- -.--- -----
aI N V 4 I % I F
L W. Kalch
>gricultural Extension Service
Plywood-1/ x 2' x 4', AA Exterior.
Glass-.1 piece 3/16" x 15" x 17" (front of incuba
1 piece 3/16" x 12" x 17" (top of ineubatol
-i" hardware cloth -12" x 16" (bottom of egg tran
Nails-1 lb cement coated box nails.
Metal trim or molding-72" (holds glass in place).
Sheet aluminum or tin-2 discs, each 1" diameter (
for ventilation holes).
OPERATIONN OF A
Sfiii and educational project for both wmiI:e
,,ii,,I observation ..- the 1.':. 0I*, 1,'i', of the
truction and operation of a -1.,.1! incubator.
1ials cost of -' i to --.. Some students may
.ess p i.. : .- incubators can be constructed.
J / [ Htl ,,:i .n < d odZ ro/'o
:0j. canl of name in color, of yo Fl choice.d,
shellaec-3n oz. can.
-approximately 6" wide, 8" long and 2" deep.
nri and control unit.
rnrww : AUUL
From the 2'
the following size
One piee ]
0ne })i.< 1
As:eueiille as jl
(i 1' I Ii IicLi~ia-ij
i" 'ic~ tv 'aic'ts
lip ii: .
ouDiainn; in nI naiteii s or i roin any poltry
rno slers arie uhelr' kept wlth ithe ihn :. }'g e
froiit '(('(id store arc not fertil: anti therefo
HIatcliig ('Ss< Ishould be incubated as lsooni
aftN r they arte lai. They can, however be
siven days with oad resuIts when Iteld at a i
of 50' to (0'F and a relative humidity of 70 to
Temperature of Incubator
Iperlit7Of \Wni DUt UOle LU uceermluie Sne oest operating con-
litions for his particular incubator. For example, if the
irst hatch of chicks comes off at 20 days instead of the
normal 21 days, the incubator was too warm and the
operating temperature should be lowered a bout one de-
free F for the next hatch. If the chicks are requiring
nore than 21 (lays to hatch, the incubator i. too cool and
he I .. r-i, should be raised about one degree F.
'.r.,, y chicks pip the shell on the 19th day, emerge
rrom the shell on the 20th day, and are dry and I ,1il.
>ut and ready to be removed from the incubator on the
Do not place the incubator in drafts or .irect sunlight
0r 1n.-f t n 4 e nrhir4+nd it th4r a nni+^o t-T)' w++1 + -+ h
To prevent the eggs from (
ure must be added to the air.
he small pan with water to a c
Sunder the egg tray.
1 ,,1. 2 shows the comp:
epth of one inch and placing
arative size of the air cell
111 0I1tuuu11 nu1. XX Ilide sa irl '1 100 SlUU oIVW I1 UlElnIIig, LUU
nuch moisture is present. On the other hand, if the air
ell is too large, more moisture is needed. Size of the
air cell can be determined by ,.11r'lt.11 (placing the egg
beforee a strong light).
It may be necessary to sprinkle the eggs I ,Itrl;. with
varm water at the time of hatching to prevent the chicks
rom sticking to the shell. This is done when the first