Gi BULLETIN 610, U. S. DEPARTMENT OF AGRICULTURE. 
This experiment was started September 12, 1916, and continued 56 
days, ending November 7, 1916. Twelve high-grade Berkshire pigs 
between 5 and 6 months of age, averaging approximately 150 pounds 
in weight, were used in this work. Those selected were very uniform 
in age, quality, breeding, and weight. The pigs were taken off pas- 
ture and put in the dry lot a week before the experiment proper 
began. They were confined in a permanent hog house and arranged 
into 4 lots of 8 pigs each. The pens used for each lot measure 6 
feet by 74 feet, and have cork-brick floors. Attached to these pens 
are outside runs of concrete ¢ feet by 39 feet. Prior to the experi- 
ment the pigs were fed a ration of 5 parts corn meal, 4 parts 
middlings, and 1 part tankage. The experimental rations were as 
follows: . 
Lot 1 (check lot), 6 parts corn meal, 1 part tankage. 
Lot 2, 6 parts dried pressed potato, 1 part tankage. 
Lot 3, 6 parts dried pressed potato, 1 part linseed oil meal (old 
process). 
Lot 4, 6 parts dried pressed potato, 1 part fish meal. 
Following are the analyses of the dried pressed potato rations as 
made by the Bureau of Chemistry, Department of Agriculture: 
Analyses of dried pressed potato ration. 
: : Ether . Crude Nitrogene 
Ration. Moisture. Ash. ertniees Protein. aS) See 
Ss lb | |__| 
Per cent. | Per cent. | Per cent. | Per cent. | Per cent. | Per cent. 
11. 83 3.04 0.80 11.03 2.29 
Dried pressed potato and tankage......... 71.01 
Dried pressed potato and oil meal......... 11.91 1.65 . 67 5. 96 2. 98 76. 83 
Dried pressed potato and fish meal........ 10. 96 4.04 2. 87 | 13.09 1.85 67.19 
The lots were fed three times daily (7 a. m., 11.30 a. m., and 4.30 
p. m.). For each meal the feed for each lot was weighed and put 
into a bucket with enough water to make a thick slop. The feed 
was mixed with water one-half hour before feeding, so as to allow 
it to soak. Just after the feed was mixed live steam was turned into 
each bucket of feed for a few minutes to facilitate soaking. A 
fresh supply of water was given to the pigs about the middle of the 
forenoon. The hogs were weighed on the scales located inside the 
permanent hog house; the weighing was done about 9.30 a.m. Indi- 
vidual weights were taken for three consecutive days (one day pre- 
vious to the beginning of the experiment and each of the first two 
days of the experiment). The average of the three weights was 
taken as the weight of the second day or the beginning of the experi- 
ment. Individual weights were taken every Tuesday thereafter 
until the conclusion of the experiment. 
