4 Igllllflllill N0. ,220
of the lysin fed would be derived from animal sources, and to
endeavor to throw more light on the subject of the value of
milk in the ration for growing chicks. \Vith these factors in
mind. eight lots of chicks were fed according to the following
plan: i
liot l—l{ation to he composed of grains relatively high in
lysin. supplemented hy skim-milk, fed to hrooder-raised chicks.
liot 2—Ration to be composed of grains relatively low in
lysin, supplemented hy protein-tree milk H11(l butter-fat, fed i
to hroodcr-raiscd chicks. .
liot Z5~Ration to he an accepted standard ration, ted to
. hrooder-raised chicks.
liot -t—Ration to he the same accepted standard ration as
l'ed to liot 2}, hut in this case to he fed to hen—raised chicks.
liot 5--Ration to he composed of grains low in lysin and
material lil'tIlll animal sources, relatively high in lysin, fed
to hrooder-raised chicks.
Lot G—Ration to he composed of grains high in lysin,
with cottonseed meal hut no animal proteins, fed to hrooder-
raised chicks.
liot T—Ration to he the standard ration fed to Idiot 3,
minus the sour Sl(llIl~llllll{, l`ed to hrooder-raised chicks.
liot tl~—l{at‘ion to he derived from grains high in lysin,
with cottonseed meal (same as Lot 6). plus skim-milk ad lib}- A
tum, ted to hrooder-raised chicks.
All ot' these lots of chicks had ground grit. o_vster shell
and charcoal het`ore them at all times and were daily sup-
plied Iihcrally with shredded cahhage and sprouted oats.
'l`he tirst part ot' this investigation, in which we studied
the etl'ect ot' these rations on the growth of chicks, extended (
over a period of 28 weeks, after which time l5 representative
pullets from each lot were selected and placed on a standard
ration and during the succeeding 12 months a record was
kept of the eggs laid hy each lot.
'l`he grains used in the rations were selected with respect
to their lysin content according to the analyses_of the separate