METHODS OF INVESTIGATION. 65 
Ox. Sheep. Swine. 
Half Fat,| Fat, Lean, Fat, Lean, Fat, 
Per Cent.|/Per Cent./Per Cent.|/Per Cent.|Per Cent.|Per Cent. 
Wahine duces oiueren viene 56.1 48.6 61.0 46.2 58.2 42.9 
Dry matter...........4. 43.9 | 51.4 | 39.0 | 53.8 | 41.8 | 57.1 
100.00] 100.00] 100.00] 100.00] 100.00| 100.00 
5.1 4.1 3.4 2.9 2.8 1.7 
20.7 31.9 19.9 37.9 24.6 44.0 
Other organic matter 
by difference........ 18.1 15.4 | 15.7 13.0 | 14.4 | 11.4 
43.9 51.4 39.0 53.8 41.8 57.1 
Total nitrogen.......... 3.0 2.4 2.55 2.1 2.3 1.9 
Per cent. of nitrogen in 
“other organic matter” | 16.58) 15.59) 16.24] 16.19) 15.97) 16.66 
flesh of cattle, sheep, and swine, after extraction with ether for 
480 hours, computed ash-free, were: 
Carbon ccecaiwied seeanaakeai see reRO Ns 52.84 
HydrOgeniccs. adden aia wen eee 7.22 
Nitro petives peeve eke iS an eet meat deinen 16.46 
ORYGOD icc. ete eee ae eee eh Ses 22.89 
Sulphuts occu cays ee ate eee es 0.59 
100.00 
Considering the indirect method by which Henneberg’s result 
was reached, the agreement as regards nitrogen, both with Kohler’s 
results and with those of Rubner, Stohmann, and Argutinsky just 
cited, is remarkably close. Henneberg assumed the following 
round numbers to represent the average composition of the total 
protein of the body, and his example has been generally followed 
-by subsequent investigators: 
@arboni sits: ceed eee een yee ees 53 per cent. 
PiyOtoRen.cocken doi wareweka Teton cto 
Nitrogen... 1... e cee cece eee e eee neee 16° « 
Oxygen..... beissS dinners sen aunkesaareea ote areata ed 23s 
Sulphur........ ein aataustana cree henner wae doe Se 
100 
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