24 BULLETIN 1138, U. S. DEPARTMENT OF AGRICULTURE: 
periods and the changes in weight of the three pens of pigeons, it is 
apparent that*neither 5 nor 15 per cent of ox liver in the ration was 
sufficient to protect the birds against polyneuritis for any considerable 
time, but that 30 per cent of ox liver was sufficient to protect three 
pigeons for at least 105 days. Each of the three pigeons had gained 
in weight and was in fine condition at the close of the test, but the 
fourth bird getting the same ration developed polyneuritis on the 
ninety-third day. The changes in weight of the pigeons are shown 
in Figure 21.. 
TaBLE 13.—Experimental feeding of dried ox liver and polished rice. 
Liver ration. Eigece aaths Sean Result. 
PEN 35. Days. | Per cent. } 
5 per CONOR TIVereet = hehe eee ees oat ee, no 44 | =e Pelmeuritiss 
ORE SSCS er ee Rae ER a eR i eee fi 39 — 28. 0. 
Doses esate SIT aks hn pee ee ele Sh et | 115 45 —17.0 Do. 
DOP RS ee Se oes. See me beet ens Re a ee ey 117 40 —22.9 Do. 
TA VGTAG CH ee aie eee Fae ee ae ee 42 —20.9 
PEN 36. | 
LORD ET CEM UG OXUI VETS fc heen eee eee 116 55 | —14.8 | Fair condition at end of test. 
LD XO) os See eo ae ae Be a a ee oe Se 118 40 | -—10.8  Polyneuritis. 
HD) ENS ir Se ae eee Se Ue per eee 119 37 —1.8 Do. 
1D X0)S 50 ee te here eee CER tome a a Cec 3 | 121 45 —10.0 Do. 
FAVIGLA GO vtec ote eee Cm rape a | See 44 — 9.4 
PEN 37. 
30. per CONRORAL Vers tre. Ate. Sere esau 120 105 | +19.3 | Fine condition at end of test. 
Qaete see i ee Ee he nee 123 105 + 9.9 | Do. 
Dor aiatee tian Nia 124 105 | 4 2.412) Do: 
1D. OS See c eee Bae ee ee ene pees en We saree ee 214 93 — 1.3 | Polyneuritis. 
PALVOL ACCA ia we a cme is Ge ce Sera (eer ee eee 102 + 7.6 
PEN 26 
PEN 2S PLN F7- 
S PLR CENT LIVER 30 PER CENT LIVER 
pe | Saleen alec ou a 
FIO ce 
oe er ememnanenaee a tee AA Cader eee | 
cae fiver | \ Tt | PNT | ean 
ees TTT beP AMAT aay: ND. AD ea 
ca ca DFAS oe cc oe PER 
SSe0 VRE pos | 
§ : MEGhRReSeea . : 
Se Renan. | Le | 
LIICH HORIZONTAL SFYICLE REPRESENTS /0 DYS 
Fia. 21.—Dried ox liver; changes in weights of pigeons fed. 
TESTS WITH CALF LIVER. 
The results of the feeding tests with calf liver are shown in Table 14. 
Three pens of pigeons were fed rations which contained 5, 15, and 30 
pe cent, respectively, of calf liver. On taking into consideration 
oth the survival periods of the pigeons and their changes in weights, 
it is evident that the ration which contained 5 per cent calf liver had 
the lowest antineuritic value, followed in turn by those containing 
15 and 30 per cent of the tissue. The changes in the weights of the 
birds are seen in Figure 22. 
