534 ME. J. B. lAWBS AXD BE. J. H. fflLBEET ON THE CO.IPOSITION OF 
It is obvious that the coi-rectness of the indications of these Tables wiU entirely 
ditions), to which the dheot analytical data are tobe apphech 
r. :;;s « .. j.... 
pZrL of dry substance than leaner ones, and as their dry 
larger proportion of fat, and less of nitrogenous and mineral matters, u is c e , 
increme itself must contain a higher pei-cent^e °y°*’^ fj^^' ^Xof“he fattened 
rrvtv well “It we might Lticipate ; and they are, with some sUght qualifica- 
tions, in the main consistent with the dis-ect results arrived at, 
the increase of the individual fattened pig. It should be remaiked that p 
“ tie limals analysed, which form the basis of these estimates of the comp^- 
tion of increase are given (see Table VII.) on the fasted hve-weight, so as to eh 
nate as far as possible the influence of the variable amount of contents of stoma': is am 
intestines The percentages thus calculated to the fasted Ine-vieig it, aie,^ , 
the umposes of fhe Tables now under consideration, applied to the original and fin 
weights of animals, in the imfasted condition. The tendency of , 
this head, would be slightly to rediwe our estimated percentages oifai and o 
matter and slightly to raise those for the nitrogemus and mineral matteis. 
1^^7e.JJoren, it was difficult to find the record of experiinents, in which tte 
anlllt imd been fed over a period of time sufficiently long to 
condition equal to that assumed between the Bullock taken as . 
analysed as “ fat.” As is seen, in Table VIII., the calculation has, in all been mad 
for ninety-eight a n ; m a,1s ; twelve of which were fed for nearly nineteen weeks , . 
“eks Ld thh-ty-six for 26i weeks. It is probable that the estimate is the m^t 
nemly correct for the thirty-six animals, whose period under experiment w as the s • 
all whose proportion of increase upon 100 of their original wnight was the high^t 
The mean of all the ninety-eight animals gives for the composiUon of w mat 
per cent, of total di-y substance, of which 66-2 was fat, 7-67 dry “*tog™ous “niiMun^^^ 
and 1-47 mineral matter. These figures may, perhaps, be taken as pirtty nu 1 
sentiim the average composition of the increase over the concluding peiio o > ' ■ . 
r mme, of animtls well fed on fattening food, and brought at last to a to- ^ 
of maturity and fatness. In passing a judgment as to the P-b"ecf n f nun 
error, we should say, that the fat and total dry matter are moie likely 
somewhat too high, and the nitrogenous matter somewhat 1°° 1°"'^ 
For sheep, the composition of the increase has been calculated fo 
