32 BULLETIN 1138, U. S. DEPARTMENT 9F AGRICULTURE. 
THE EFFECT OF HEATING UPON THE ANTINEURITIC VALUE OF OX LIVER, HEART, AND 
: KIDNEY. 
Since liver, heart, and kidney are, of course, not used in a raw 
condition as human food, it is important to know the effect of cooking 
upon the antineuritic value of these tissues. In Table 20 are pre- 
sented the results of feeding experiments with pigeons to test the 
effects of heating upon the antineuritic properties of ox liver. The 
changes in weight are shown in Figures 32 and 33. 
TABLE 20.—Effect of heating ox liver on its antineuritie value. 
| Pigeon | Survival |Change in Result 
Liver ration. | No. period. | weight. | 
PEN 59. | 
| Days. | Per cent. 
30 per cent ox liver heated 2 hours at 100° C. 91 18  —18.5  Polyneuritis. 
DORE Ss ee Se ee 92 20 | —6.0 Died. 
DO2 hn Fae aaa SIS eee ewes fee 93 20 —18.0 | Polyneuritis. 
DOr See eee ee Bie 94 35 | —17.9 | Thin, active, end of test. 
AV OCTASC 0. tae eae een en seeneps ae eaten sees 23 —15.1 
PEN 60 
30 per cent ox liver heated 2 hours at 124° | 
CGainautoclave:. 2-6 = ies <a. gece canes 86 25 —16.8 Polyneuritis. 
On cee Shs se oee eae Ue eee oe bee 88 23 —13.9. Do. 
HD eS as pen a oe Se aye eee 89 17 —17.6 Do. 
DO ee eee ee ee eee eee 556 24) —23.7 | Do. 
UAV CLAP CO cays Seer c tae nase eee eae ee eeeeene 22 —18.0 
PEN 61 
30 per cent ox liver heated 2 hours at 130° 
Chin BULOclavesse issn nee eeee eee eee 81 25} —24.3 Do. 
OSG Sen ee See Sn ek See ee ee 82 32 —34.7 Do. 
OE = becca Soo SNS eee ee ee ee 83 30) —44.9! Do. ? 
Dorset sata c eta Cae eae tee 84 30 | —27.7 | Fair condition end of test. 
Avveraget ho) rao eae ge ares eee ee 31 | ~ —32.9'| 
PEN 62. | 
Zo per cent iried Ox liver<ss5...2-2---.-2- 5. 169 7 —4.2 Do. 
One eee ee Se ea eee ear eoe 170 43 —9.8 | Polyneuritis. 
DORA ee Se ee Se ee 2 a 171 65 —25.4 | Do. 
DGS. Base ee tes en We as ee re 172 48 —2.9 | Do. 
DO. Ben see eee eee 173 70 —1.5 | Fair condition end of test. 
A Velage. cates. ek. Se ee aa ees omens 59 —11.0 
PEN 63. 
25 per cent ox liver baked 30 minutes at 186° 
ESA ATs Rear RET) eee A ena eee 4 42; —12.1 | Polyneuritis. 
D0 See ee eae ere eee eee 5 inn | +3.7 | Fine condition end of test. 
DOE eee er are bs SE eee eee 6 55 +1.6 Do. 
ASVOTARCS = S222 sol sek eee eee a aseoee es ol | —2.3 | 
Pen 59 was fed a ration which contained 30 per cent of liver that 
had been heated two hours in live steam at 100° C. The liver was 
first dried in the usual way and then spread out in a thin layer in 
pans and heated in an Arnold sterilizer for two hours and again 
dried. The result of the feeding test with the ration containing 30 
per cent of this lot of liver indicates that the antineuritic value of 
the tissue had been largely destroyed. One pigeon developed poly- 
neuritis on the eighteenth day, another on the twentieth day, a third 
died on the same day without positive symptoms of polyneuritis, 
while the fourth bird was in fair condition on the thirty-fifth day 
when the test was concluded. ~ 
