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List of publications
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Forest Products Laboratory (U.S.)
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The Laboratory
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Ceased with: Jan. 1/June 30, 1967.
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Description based on: July 1/Dec. 31, 1928; title from caption.

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UNIV. OF FL Li.


l.. DEPOI ATOi

U.S. DEPROMTOfY


LIST

S OF

PUBLICATIONS


July 1


to December 31, 1965


FOREST PRODUCTS LABORATORY
FOREST SERVICE
U S DEPARTMENT OF AGRICULTURE
MADISON. WISCONSIN 53705























CONTENTS


Chemistry of Wood ar

Derived Products.


* & a a U a a 0 a a


Fire Properties ........

Fungus and Insect Research .

Glues, Glued Stock, Plywood

and Veneer. ....

Packaging. . ...

Plastics. . ...

Sandwich .. .

Seasoning. . ...

Timber Mechanics ...

Wood Fiber Products .

Wood in Construction .

Wood Preservation. ..

Wood Residue Utilization .


.......

. S

.......


.....m.

.......





....e...




.......
. S S .

* 5 S .

. .

. .S .
* 5 5 6

* S 5 0

* S S S

S S U S

S S S S

6 S 6 5


Wood Structure and Growth Conditions.

Miscellaneous . .








LIST OF PUBLICATIONS


JULY 1 TO DECEMBER 31, 1965


In this semiannual list of publications, items
marked with a number are available free at the
Forest Products Laboratory while the supply
lasts. To request publications simply circle the
number of the item desired on the accompanying
postcard and mail to the Laboratory. Blanket
requests for publications cannot be filled. Publica-
tions not marked with a number are unavailable
at the Forest Products Laboratory. They may be
consulted at most public and college libraries.
Reports of slight interest to the layman are listed
under the caption "Highly Technical."


Chemistry of Wood and Derived Products


Highly Technical

1. Chemotaxonomy as an aid in differentiating
wood of eastern and western white pine, by
Margaret K. Seikel, Stan S. Hall,
Linda C. Feldman, and Robert C. Koeppen.
Amer. Jour. Bot. 52(10): 1046-1049, Nov.-
Dec. 1965.
Heartwoods from eastern and western
white pine can be separated, with about
95% accuracy, by subjecting their acetone
extracts to simple paper chromatography.
This differentiation is possible because the
relative proportions of certain flavanones
vary in the two species, and when these
are treated with the chromogenic spray,








distinguishing colors are produced.


Dimensional stabilization of hardboard by
combined acetylation and heat treatment,
by Leif 0. Klinga, Harold Tarkow, and
Ernst L, Back. Svensk Papperstidn. 68(17):
583-587, 1965.
Heat treatment followed by acetylation
of Asplund hardboards gives the greatest
reduction in water absorption, equilibrium
moisture adsorption, and dimensional move-
ment. Reversing the treating order gives
smaller reductions in these properties.

2. Dynamic osmotic pressure measurements
on low molecular weight polymers, by
William C. Feist. Jour. Polymer Sci. B3(10):
875-878, Oct. 1965.
With the aid of a high-speed, dynamic
osmometer and a highly selective mem-
brane, it has been possible to accurately
measure the IT (number average molecular
n
weight) of several well-characterized, nar-
row molecular weight distribution poly-
styrene samples. The range of M meas-
n
ured was 1,200 to 78,000.

Enzymatic dehydrogenation of lignin model
phenols, by John C. Pew,.WilliamJ. Connors,
and Alice Kunishi. Chim. et Biochim. de la
Lignine, de la Cell. et des Hemicell. Int.
Symp. Proc., pp. 229-245, Grenoble, France,
June 29-July 4, 1964.
Guaiacyl- and syringylpropane-type lignin
model compounds, with and without conju-
gation in the side chain, were dehydro-
genated with peroxide and peroxidase. Bi-








phenyl and diphenyl ether dimers were
obtained with guaiacyl compounds, while a
portion of both guaiacyl and syringyl com-
pounds became hydroxylated in the side
chain through direct formation of quinone
methide intermediates.

3. Structure of contortadiol (agathadiol), con-
tortolal (agatholal), and hydroxyepimanool
(epitorulosol), by John W. Rowe and
Gary W. Shaffer. Tetrahedron Lett. No. 30,
pp. 2633-2637, 1965.
The structures of three labdane diterpenes
previously isolated from lodgepole pine
bark have been completely elucidated. Alter-
nate names are suggested. Agathadiol is a
known natural product. The agatholal and
epitorulosol have not been found previously
in nature.

4. Triterpenes of pine barks: Naturally occur-
ring derivatives of serratenediol, by
John W. Rowe and Carol L. Bower. Tetra-
hedron Lett. No. 32, pp. 2745-2750, 1965.
Pine barks have been found to contain a
series of new triterpenes related to the
unusual serratenediol. The complete proof
of structure of six naturally occurring
derivatives of serratenediol has character-
ized two isomeric diols, a monomethyl and
a dimethyl ether, and methoxy and a hydroxy
ketone.



Fire Properties


5. Corridor wall linings-Effect onfireperform-
3








ance, by E. L. Schaffer and H. W. Eickner.
Fire Technology 1(4): 1-13, Nov. 4, 1965.
During December 1964 and January 1965,
research was conducted to determine the
effects of three types of wall linings on fire
performance within a partially ventilated
corridor. Temperature and light transmis-
sion data were recorded, and gas samples
were collected for immediate and later
analysis.


6. Effect of wall linings on fire performance
within a partially ventilated corridor, by
E. L. Schaffer and H. W. Eickner. U.S.
Forest Serv. Res. Paper FPL 49, 29 pp.,
Dec. 1965.
Presents the results of three full-scale
fire tests within a partially ventilated 73-
foot corridor, where the first test was
made with essentially noncombustible wall
and ceiling linings, the second test with
1/4-inch prefinished wood-grained hard-
board wall linings, and the third test with
the walls lined with red oak flooring.

7. Predicting maximum surface temperatures
of wood in exterior exposures, by
Eugene M. Wengert. Forest Prod. Jour.
15(7): 263-268, July 1965.
An equation for predicting the maximum
temperatures of products was developed
from fundamental energy balance consider-
ations. The derivation, applicability, and
limitations of the energy balance equation
are discussed.








Fungus and Insect Research


8. Determining resistance to soft-rot fungi, by
C. G. Duncan. U.S. Forest Serv. Res.
Paper FPL 48, 13 pp., Dec. 1965.
A laboratory procedure is outlined that
incorporates techniques found to promote
soft rot by several fungi. The principal
findings of experiments underlying the pro-
cedure are also presented.

9. Fundamental characteristics of wood decay
indicated by a sequential microscopical
analysis, by W. W. Wilcox. Forest Prod.
Jour. 15(7): 255-259, July 1965.
Very thin cross-sections of pine and
sweetgum sapwood, in progressive stages
of decay by a brown-rot and a white-rot
fungus, were examined microscopically.
The development of attack on the various
segments of the cell wall, with the four
combinations of wood and fungus types, is
described in detail.

10, Fungi associated with principal decays
in wood products in the United
States, by Catherine G. Duncan and
Frances F. Lombard. U.S. Forest Serv.
Res. Paper W'O-4, Oct. 1965.
Data on the associations between almost
2,000 Basidiomycetous fungi and various
decayed wood products are given. The data
indicate the associations between the type
of decay, the host wood and product, its
preservative content, if any, the geographic
area where the decayed product was found,
and the decay fungus.








Glues, Glued Stock, Plywood, and Veneer


11. Accelerated aging of adhesives in plywood-
type joints, by R. H. Gillespie. Forest
Prod. Jour. 15(9): 369-378, Sept. 1965.
Adhesives in plywood-type joints were
subjected to accelerated aging to deter-
mine the effects of the degrading influences
of heat, moisture, and cyclic swelling and
shrinking stresses. The rates of shear
strength loss with time of exposure were
shown to follow laws commonly associated
with chemical reactions.

12. After two decades of service glulam timbers
show good performance, by M. L. Selbo,
A. C. Knauss, and H. E. Worth. Forest
Prod. Jour. 15(11): 466-472, Nov. 1965.
Reports on 12 laminated bridges in serv-
ice from 6 to 20 years. Douglas-fir and
southern pine timbers laminated with resor-
cinol and phenol-resorcinol adhesives,
treated with oil-borne preservatives, were
excellent. Timbers in one bridge glued from
wood treated with water-borne preserva-
tives showed checking and delamination.

13. A comparison of the block shear, cross-lap
tension, and glue-line cleavage methods of
testing glued j o i n t s, by A. G. Stanger and
R. F. Blomquist. Forest Prod. Jour. 15(12):
468-474, Dec. 1965.
Glued joints of radiata pine and tawa
lumber were tested in the conventional
block shear, cross-lap tension, and a mod-
ified cleavage procedure. The cleavage test
gave the lowest percentages of wood failure.









The simpler-to-fabricate tension and shear
specimens gave higher percentages of fail-
ure with the glues used.

14. Device for estimating wood or glue failure in
glue block shear test, by Forest Products
Laboratory. U.S. Forest Serv. Res. Note
FPL-0102, 3 pp., Sept. 1965.
The new device is a rectangular piece of
clear plastic material the size of the glue
joint area of a shear-block specimen.
Marked off on it are areas of various
shapes, each representing 5 percent of the
total glued area. By use of this device the
wood failure can be estimated with reason-
able accuracy, regardless of the shape of
the breaks.

15. Performance of melamine resin adhesives in
various exposures, by M. L. Selbo. Forest
Prod. Jour. 15(12): 475-483, Dec. 1965.
After 20 years' outdoor exposure, mela-
mine glue joints in Douglas-fir beams were
excellent, and gave as high block-shear
strength values as resorcinol and phenol-
resorcinol glue joints similarly exposed.
On oak, melamine glue joints showed pro-
gressive deterioration in continued salt-
water soaking, and were near failure after
16 years, while phenol-resorcinol glue joints
maintained their strength.


Packaging


16. Comparison of two specimen shapes for short
column test of corrugated fiberboard, by








J. W. Koning, Jr. U.S. Forest Serv. Res.
Note FPL-0109, 11 pp., Oct. 1965.
A comparative evaluation of short column
test specimens of corrugated fiberboard
indicated that the difference in average
compressive strength was not significant
between rectangular and necked-down
shapes. Based on ease of specimen prepa-
ration, however, the rectangular specimen
appears to be more practical for industry
use than the necked-down shape.

17. New tests probe cushioning properties of
corrugated board, by C. A. Jordan and
Robert K. Stern. Package Eng. 10(12): 76-94,
Dec. 1965.
D dynamic compression characteristics
(peak acceleration-static stress curves)
were conventionally determined for 4-ply
pads of corrugated fiberboard and by a new
method for 1-, 2-, 3-, and 5-ply pads. The
new procedure, involving the use of a
computer, promises important potential
savings.

18. Phenolic resin treatment improves fibre-
board compressive strength, by
John W. Koning, Jr., and Donald J. Fahey.
Package Eng. 10(10): 130-139, Oct. 1965.
The wet compressive strength of corru-
gated fiberboard containers was signifi-
cantly improved through treatment of the
paperboard components with a low-
molecular weight, water-soluble, phenolic
resin. However, the impact strength of the
containers was reduced. Problems intreat-
ing the paperboard and manufacturing the
containers were also discussed.









Highly Technical


19. Edgewise compressive strength of corrugated
fiberboard as determined by local instabil-
ity, by R. C. Moody. U.S. Forest Serv. Res.
Paper FPL 46, 9 pp., Dec. 1965.
A method is presented for predicting the
edgewise compressive strength of corru-
gated fiberboard. Local buckling was
assumed to occur in the specimens and the
edgewise compressive strength was calcu-
lated from critical buckling stresses for
the components. Theoretical or calculated
strength is compared with strength deter-
mined experiment ally.


Plastics


Compression testing the unwoven fibre com-
posite, by Karl Romstad. Reinforced Plas-
tics 4(5): 16-18, Sept.-Oct. 1965.
Tension testing the unwoven fiber composite,
by Karl Romstad. Reinforced Plastics 4(6):
16-17, Nov.-Dec. 1965
Methods of obtaining strength and elastic
properties of plastic laminates reinforced
with unwoven glass fibers were evaluated
using the criteria of the strength values
obtained and the failure characteristics
observed. Variables investigated were spec-
imen configuration and the manner of sup-
porting and loading the specimens.

20. Effect of thermal cycling on tensile and
compressive strength of reinforced plastic
laminates, by Gordon H. Stevens. U.S.
9








Forest Serv. Res. Paper FPL 37, 9 pp.,
Aug. 1965.
Presents the modulus of elasticity and
strength values of four reinforced plastic
laminates in tension and compression at
room temperature and at 5000 F. Prior to
evaluation at these temperatures, the test
specimens were exposed to thermal-shock
cycling.

21. Thermal conductivity temperature relation-
ship for nine glass and asbestos fiber-
reinforced aircraft plastics, by
Wayne C. Lewis. U.S. Forest Serv. Res.
Paper FPL 36, 14 pp., Aug. 1965.
The coefficients of thermal conductivity
for mean temperatures ranging from about
-300* to +500* F. were determined for nine
combinations of asbestos fiber or glass
fiber and cloth reinforcement, with epoxy,
phenolic, silicon e, phenyl silane, and
epoxy-novalac resins.


Sandwich



Highly Technical

22. Effect of core thickness and moisture con-
tent bn mechanical properties of two
resin-treated paper honeycomb cores,
by Paul M. Jenkinson. U.S. Forest Serv.
Res. Paper FPL 35, 25 pp., Sept. 1965.
Presents results of compression and
shear evaluations of two resin-treated paper
honeycomb cores. The cores had densities
of 1.7 and 3.7 pounds per cubic foot. Cores









were evaluated in thicknesses of 1/4 tc
2 inches and at several moisture contents
ranging up to 80 percent.

23. Minimum weight structural sandwich, by
E. W. Kuenzi. U.S. Forest Serv. Res. Note
FPL-086, 15 pp., Rev. Oct. 1965.
Presents theoretical analyses for deter-
mination of dimensions of structural sand-
wich of minimum weight that will have
certain stiffness and load-carrying capabil-
ities. Includes a brief discussion of the
resultant minimum weight configurations.



Seasoning



Highly Technical

24. Longitudinal permeability of green eastern
hemlock, by Gilbert L. Comstock. Forest
Prod. Jour. 15(10): 441-449, Oct. 1965.
A technique for measuring the longitudinal
permeability of green wood is described.
The variations within and between trees
and the correlation between permeability
and other physical properties were deter-
mined. The effect of steaming and extraction
on heartwood permeability was investigated.



Timber Mechanics



25. Beam strength as affected by placement of
laminae, by Peter Koch and BillyBohannan.
Forest Prod. Jour. 15(7): 289-296, July 1965.
11








The study showed that beams glued up
from southern pine veneers were strongest
and stiffest when assembled with the stiffest
laminae in the outer portions and the most
limber in the center. The beams, 100 inches
long, were laminated from twenty-one 1/3-
inch-thick S4S veneers, 3 inches wide.

26. Derivation of fiber stresses from strength
values of wood poles, by L. W. Wood and
L. J. Markwardt. U.S. Forest Serv. Res.
Paper FPL 39, 9 pp., Oct. 1965.
Presents and discusses the authors' rec-
ommendations and modifications on fiber
stresses made in Sectional Committee 05
on Wood Poles of the American Standards
Association. Factors of variability, round
form, moisture content, and effect of pre-
servative treatment that influence fiber
stress values for wood poles are discussed.

Effects of seven variables on properties of
southern pine plywood. Pt. 3. Maximizing
dry strength, by Peter Koch and
P. M. Jenkinson. Forest Prod. Jour. 15(12):
488-494, Dec. 1965.
Discusses effects of seven variables on
the strength properties of southern pine
plywood evaluated at 11 percent moisture
content. Properties studied were strength
in true rolling shear, compression parallel
to the grain, and modulus of elasticity
parallel to the grain.

27. Evaluation of commercially made end joints
in lumber by three test methods, by
Billy Bohannan and M. L. Selbo. U.S. Forest
Serv. Res. Paper FPL 41, 41 pp., Oct. 1965.








An evaluation of commercially fabricated,
end-jointed laminations of various softwoods
using three test methods to compare the
tensile strength values as determined by
each method and to investigate the correla-
tion between tensile and bending strength.
Both scarf- and finger-jointed type speci-
mens were studied.

,8. Exploratory development of tension test
method for structural-size lumber,
by Billy Bohannan. U.S. Forest Serv. Res.
Paper FPL 40, 13 pp., Sept. 1965.
Wedge-type tension grips that have a
slight taper over part of the contact surface
between grip and specimen produced good
anchorage characteristics to load tension
specimens having a uniform cross section
throughout their length. Such grips per-
formed very well for material having
approximately 12 percent moisture content.

19. Nondestructive testing of wood-status, needs
and possibilities, by R. L. Youngs. Mate-
rials Evaluation 23(8): 372-376, Aug. 1965.
Discusses characteristics and specific
mechanical and physical properties of wood
and wood products requiring nondestructive
evaluation, together with significant prac-
tical advances and potential or promising
techniques that should be given further
consideration.


0. Structural property estimation from den-
sity samples for western woods, by
R. L. Ethington. Forest Prod. Jour. 15(10):
422-425, Oct. 1965.








The methodology of Phase IV of the
Western Wood Density Survey makes it
possible to evaluate all species on a rea-
sonably equitable, continuing basis by means
of specific gravity sampling. Guidelines
are drawn for combining species into any
desired groupings, with appropriate
description of the corresponding hetero-
geneous property distributions.



Highly Technical

31. Buckling of simply supported plywood plates
under combined edgewise bending and
compression, by John J. Zahn and
Karl M. Romstad. U.S. Forest Serv. Res.
Paper FPL 50, 21 pp., Dec. 1965.
Theoretical buckling coefficients for sim-
ply supported, flat plywood plates under
combined edgewise bending and compres-
sion are derived by treating plywood as an
orthotropic plate. Curves of buckling coeffi-
cients are presented along with two examples
of their use.

32. Deflection and stresses of tapered wood
beams, by A. C. Maki and E. W. Kuenzi.
U.S. Forest Serv. Res. Paper FPL 34,
55 pp., Sept. 1965.
Approximate mathematical relationships
based on elementary Bernoulli-Euler theory
of bending are developed for the general
cases of shear and vertical stresses exist-
ing in flexural members with varying cross
sections. Experimental evaluation substan-
tiates the theoretical analysis and good
correlations are observed between the the-








orethical and observed deflection relation-
ships studied.

33. Lateral stability of deep beams with shear
beam support, by John J. Zahn. U.S. Forest
Serv. Res. Paper FPL 43, 33 pp., Oct. 1965.
An analysis of the stability of roof and
floor systems whose proportions allow lat-
eral buckling of the supporting beams, with
particular attention to the stabilizing influ-
ence of the shear stiffness of the attached
deck. Numerical results are presented in
the form of curves for four cases.



Wood Fiber Products



Highly Technical

34. Determination of the relative bonded area of
handsheets by direct-current electrical con-
ductivity, by William E. Smith. Tappi 48(8):
476-480, Aug. 1965.
Discusses the determination of relative
bonded area of pulp handsheets using direct-
current electrical conductivity. Values for
handsheets ranged from 23 percent for
unbeaten pulp to 99 percent for pulp beaten
60 minutes.

35. Drying restraint: Its effect on the tensile
properties of 15 different pulps, by
Vance C. Setterholm and Warren A. Chilson.
Tappi 47(11): 634-640, Nov. 1965.
Explains how handsheets from various
pulp furnishes respond to the effect of
restraint during drying, permanence of the
15







effects induced, and some basic density-
property relationships for handsheets made
from widely used papermaking furnishes.

36. Engelmann spruce, subalpine fir, and lodge-
pole pine mixtures for bleached ground-
wood, kraft, and sulfite viscose-grade pulp,
by Forrest A. Simmonds. U.S. Forest Serv.
Res. Paper FPL 38, 9 pp., Sept. 1965.
Describes pulping and bleaching experi-
ments which show that good quality bleached
groundwood and kraft pulps and sulfite
viscose-grade pulps can be produced from
a mixture of Engelmann spruce, subalpine
fir, and lodgepole pine, with the exclusion
of the pine from the mixture for the viscose
pulp.

37. Sulfite pulping of Douglas-fir heartwood by
two-stage processes using sodium, magne-
sium, and magnesium-ammonium bases,
by Necmi Sanyer and E. G. Keller. Tappi
48(1): 545-552, Oct. 1965.
Douglas-fir was pulped by several of the
newer modified sulfite processes. The
results indicated that bleachable pulps can
be produced and that pulp yields and strength
vary with the process and degree of cooking.

38. Wood characteristics and kraft paper prop-
erties of four selected loblolly pines, by
Von L. Byrd, E. L. Ellwood, R. G. Hitchings,
and A. C. Barefoot. Forest Prod. Jour.
15(8): 313-320, Aug. 1965.
A study of the interrelationships between
the physical properties of pulp, the chem-
ical composition of the wood, and wood
fiber morphology. The results showed no








indications that chemical constituents of
wood exerted any specific effect on hand-
sheet paper properties independently of
their relationship with fiber morphology.




Wood in Construction



39. Development of an improved system of
wood-frame house construction, by
L. 0. Anderson. U.S. Forest Serv. Res.
Paper FPL 47, 13 pp., Oct. 1965.
A new system of wood-frame house con-
struction promotes the use of low-grade
wood. Doubling wall studs and roof trusses
permits wider spacing of these members.
Roofing, siding, and interior covering mate-
rials are prepared as prefinished compo-
nents and are designed to span the wider
spacing of framing members.

40. Guides to improved frame walls for houses,
by L. O. Anderson. U.S. Forest Serv. Res.
Paper FPL 31, 28 pp., Aug. 1965.
Research indicates specific construction
details to make stronger and more rigid
walls for wood-frame houses.

41. Houses can resist hurricanes, by
L. 0. Anderson and Walton R. Smith.
U.S. Forest Serv. Res. Paper FPL 33,
49 pp., Aug. 1965.
Contains details of construction, including
fastenings, to provide hurricane-resistant
wood-frame buildings. Existing and
improved building requirements are
17








covered, as well as two systems utilizing
embedded poles and timbers.



Highly Technical

42. Distribution of wheel loads on timber bridges,
by E. C. 0. Erickson and K. M. Romstad.
U.S. Forest Serv. Res. Paper FPL 44,
65 pp., Oct. 1965
The results of research of distribution
of truck wheel loads on typical National
Forest timber bridges are presented:
(1) load testing of full-size bridge decks
under controlled laboratory conditions;
(2) load testing of Forest Service bridges
in the field; (3) the development of a
mathematical analysis of lattice systems
for bridges.



Wood Preservation



43. Effects of various preservatives of field
boxes on nail holding, by John A. Scholten.
U.S. Forest Serv. Res. Paper FPL 42,
9 pp., Oct. 1965.
A study of the effects of various types of
preservative treatments for ponderosa pine
on the withdrawal resistance of sixpenny,
cement-coated nails. Specimens were
obtained from field boxes subjected to
5 years of outdoor exposure and subsequent
indoor conditioning.

44. Effects of wood preservatives on electrical
moisture-meter readings. U.S. Forest Serv.


GPO 823 -86-2








Res. Note FPL-0106, 21 pp., Aug. 1965.
Describes the effects that some commonly
used wood preservatives have on readings
of electric moisture meters when the meters
are used to determine moisture content of
preservatively treated wood.


Wood Residue Utilization

45. Technical, economic and practical aspects
of wood-residue utilization, by
Wayne C. Lewis. Forest Prod. Jour. 15(8):
303-307, Aug. 1965.
Analyses of amounts of residue produced
and used in the United States in 1962 as
compared to 1952 are made in terms of
changed practice, improved primary manu-
facture, and residues remaining unused by
kind and by area. Examples are given for
the practice of residue utilization as it has
developed.


Wood Structure and Growth Conditions


46. Rapid measurement of tracheid cross-
sectional dimensions of conifers: Its appli-
cation to specific gravity determinations,
by Diana M. Smith. Forest Prod. Jour.
15(8): 325-334, Aug. 1965.
A technique is described, using a dual-
linear traversing micrometer,, that offers
distinct advantages over previously avail-
able methods for measuring cell diameter
and wall thickness. The emphasis is on
developing methods of measuring and cal-








culating cross-sectional tracheid dimen-
sions and determining specific gravity solely
on the basis of cell measurements.

47. Sawing to reduce warp of loblolly pine studs,
by Hiram Hillock. U.S. Forest Serv. Res.
Paper FPL 51, 53 pp., Dec. 1965.
A study to evaluate the relation of sawing
methods, log diameter, juvenile core diam-
eter, log position in the tree, presence of
compression wood, log eccentricity, and
position of the stud in the log to warp in
2 by 4 studs sawn from small loblolly pine
logs.

48. Western wood density survey report No. 1,
by Forest Service. U.S. Forest Serv. Res.
Paper FPL 27, 60 pp., July 1965.
Mean specific gravities by Forest Survey
Units are presented for 9 species of the
23 sampled by the Western Wood Density
Survey. Environmental relationships and
strength-property relationships with spe-
cific gravity are discussed.

49. What can be done about mineral stain in oak?
by E. H. Bulgrin. South. Lbrman, 211(2632):
162, Dec. 15.
Mineral stain in oak costs the flooring
industry an estimated $95,000 per week in
degrade. Little is known about the initiation
or formation of stain in oak, and less is
known about preventive or remedial meas-
ures. This article outlines a coordinated
program to solve the problem.

50. What has research done for the sawmill? by
F. B. Malcolm. Northern Logger (14): 3,









16-17, 36, 39, Sept. 1965.
The invention of the inserted-tooth saw
and the bandsaw made possible developing
sawmilling into a major industry within less
than 100 years. Developments since have
been principally on equipment improvement.
This was accomplished through empirical
research. More recently controlled
research has developed improved sawing
methods.



Miscellaneous



51. List of publications on thermal properties
of wood, by Forest Products Laboratory.
4 pp., Dec. 1965.
Contents indicated by title.

52. Wood and the homemaker, by Forest Products
Laboratory. U.S. Forest Serv. Res. Note
FPL-0107, 5 pp., Sept. 1965.
The important role played by wood in
our homes is emphasized by descriptions
of the many applications of wood and wood
products encountered by the homemaker in
her daily routine.













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