New YorK AGRICULTURAL EXPERIMENT STATION. 71 
N. free Fats (ether 
Protein. Fiber, extract. extract). 
Ground flaxseed....... Acie stent iets - OL. 60. 5D. 86. 
Buckwheat middlings....... Sree ohsee 78. 35. (ie 85. 
Bee TE SILOUTS hc estes ce ee we oe ‘teeta 83. 41. 67. 90. 
MIRON © cag he gik vim ns's e's hg cs 6 ache 58 54. 64 55. 
SOUL BN A a 49, De. 63. ae. 
PRR MOTPRET LW. oe tick al Pay ehmrege ois eye cha, S.510,0pe ole 42 49 57 b4. 
J EE Re Ao a ee ee nr OL 69 cap 84. 
Pe SeEMILOUA PO csc ee cat ce ele clay eee 67 53 78. 64 
aterm pea 1orare.. fo 2.2. cel. 78 57 65 (e% 
orn forage... ..... 5 ab We ee el ee 974 ae 15 Ts 
Nae os aa Sa ces cui ce ss 88 71. 95 50. 
reat SUA SS) WAY eis ig deteie owe wit es Fe ip 60. oes se: 
NMRERIRIOIEL OILY ovine Seas es es se es 0 81 OT. 66. 74. 
MSEMEIYVGE © a A! Wy selene sae cece e ¢ 36. G4. 58. 70. 
See ARTOMPOUN ST Oiag. 2 coat ok os wseye sc ne 47. 59 74. 74. 
MEME Ene pein s silk anu es C4 es 74 83 %3. Gis 
MPEG ee. vg Ant tee cee esc ee 48 60. 70. Gt. 
Peeeieenind Carrots. seis ec eS: , 84 80. O55 Che 
As a basis for comparison, the normal rate of shrinkage in 
milk flow that would usually occur under an efficient average 
unchanged ration was assumed to be, for every period of one-half 
month, about 2 per ct. during the third month of lactation, about 
2.5 per ct. during the fourth and fifth months, about 8 per ct. 
during the sixth and seventh months, about 3.5 per ct. during 
the eighth month and about 4 per ct. during the ninth and tenth 
months. In making this estimate, data from this Station were 
considered in connection with some from the Cornell Experi- 
ment Station, and some records published a number of years 
ago by Dr. Sturtevant. 
The amount fed was always about all that could apparently be 
used by the animal. As a rule there was a gain in live weight 
which indicates a usually sufficient amount of food. The cows 
were mostly of medium size and less than 1,000 Ibs. in weight. 
The average weight per cow for all periods was 932 Ibs. 
An idea of the prevailing composition of the rations and of 
their efficiency is given by the following data: Under 1 is the 
average from 90 individual records for one month with rations 
having a fuel value of considerably less than 30,000 Cal., and 
supplying less than 15.5 lbs. of total digestible organic matter. 
