ON THE EQUIVALENCY OF STARCH AND SUGAR IN FOOD. 427 
Turning first to pen 4, in which all the foods were taken separately and 
at will, it is seen that the highly nitrogenous lentils constituted a considerably 
larger proportion of the total food in this pen than in either of the others. 
The animals first began, pig-like, with an excessive quantity, which seems to 
bare amounted for the time to a surfeit; for in the second period they do 
not take two-thirds as much as in the first, though afterwards they gradually 
increase to the original amount, but taking then considerably less of the also 
highly nitrogenous bran than at the commencement. In this pen 4, indeed, 
the consumption of bran is at the commencement only about one-third as 
peat as in the other pens, and it gradually reduces as the experiment proceeds, 
*t amounts to little more than 1 oz. per head per day. Although, 
ii- rerorc, so much more of the nitrogenous lentils is consumed in pen 1 than 
ir ‘ j U " er °* the others, yet it will afterwards be seen, that, taking the lentils 
together, the proportion of total nitrogenous constituents in the 
. ot pens 1 and 2, especially, is not so much less than in pen 4 as would 
» ret sight be assumed from the larger consumption of lentils in the latter; 
in' II T y obserm l that this proportion of nitrogenous compounds was 
U’ ii ° t * 1er cases 8t '^ n °tably higher than in the cereal grains. 
V 1 tegard to the more general indications of this Table (IV.), it may be 
allow ii • i 1 ' n k )rmer experiments, where fattening animals have been 
tion d i aiH * *°' v nitrogenous foods separately and at their own discre- 
niirotr SCre 138 ^ e . en a vor y marked increase in the proportion of the non- 
ohvS en - U8 u COnstituenU consumed as the animals matured. This is not 60 
ordinR 8 't- j Present instance; but in this case the foods were not of an 
bistinc? pi and ' vere ouch as to give more scope for the exercise of the 
their n„° . , P a ' a to. The result is that those animals which were allowed 
and tl . 0 c . 00 a ^ the foods, took first an excessive amount of the lentils, 
dental ar ?° IJl ^ to l * ie ot * ,er extreme, of the Sugar; so that, with this inci- 
aiiimal «, l L 0re ^ an usuu * interference of the palate with a naturally greedy 
foi-minlr i° i t,le mere progress of the respiratory requirement and fat- 
tlieir fL eiKl(;nc y ^ ie animals less clearly indicated in the selection of 
In TR h.!T din & t0 * ts ult ‘«»atc composition, 
live-wpiul t * Wc * luve amount of gross food consumed per 100 lbs. 
l,| etotaK! • , nimul l^r week during each of the successive periods, and 
by the P r n ° d °. f tlie cx Poriment; also the amount of gross increase obtained 
Tai l V 8Um P t,on ° y ^0 lbs. of food during the same periods. 
0f?ncr;7 0 Sh0Win « the rate ofthe consumption of food, and of the production 
—— tn weight , during the successive peri ods of the experiment. 
description of the Average weekly consumption of total food, per 100 lbs. 
_live-weight of animal. 
/ Dentils. 
I bran....; 
■{Dentils.. 
I bran. 
(Dentils,. 
I bran . 
None .. 
Sugar ... 
Starch ... 
Sugar ... 
Starch ... 
Lentils... 
bran ... 
Sugar ... 
Starch ... 
1st 
period. 
14 days. 
2nd 
period. 
14 days. 
3rd 
period. 
14 days. 
4th 
period. 
14 days. 
5th 
period. 
14 days. 
Average 
of total 
period. 
36-2 
31-8 
279 
26-6 
23-2 
290 
37-6 
31-9 
28*4 
28-5 
26-5 
30-5 
j-38-8 
36-5 
• 32-9 
325 
26-5 
330 
i- 41*3 
31-8 
331 
31-9 
30-2 
326 
38-5 
330 
30-6 
29-9 
266 
31-3 
