ON THE FORMATION OF FAT AND MUSCLE. 
505 
drical consolidation. A large bone maintains a coarse bred animal, 
a dull feeder, with a torpid vascular action, that only tardily irri- 
gates the frame with the living* stream. Such animals have a 
greater disposition to lay on more muscular than fatty substance. 
Having concluded my observations on the external structure, re- 
lative to the propensity animals have of making fat, I shall now 
offer a few opinions on the arrangement of the internal organs for 
that purpose. 
The lungs should be large, but not occupying the chest too 
much posteriorly; the chest capacious and deep anteriorly; these 
being the organs for preparing the arterial blood that nourishes 
every part. 
I have also remarked, from inspection after death of hundreds 
of animals, that the roots of the lungs do not diminish in size so 
much as that portion which is in contact with the midriff in the 
fattening animal : lungs over large are not more productive of 
fat than those which are of a moderate size. My solution of this 
fact is, that if the lungs occupy too much of the chest in the 
posterior part, there is a limitation to the expansion of the ru- 
men or first stomach, and the animal does not enjoy so much 
lengthened quietude in rumination, a circumstance very essen- 
tial to the fattening beast. This substantiates what I have 
before stated. The chest cannot be too deep nor yet too broad 
in its anterior external conformation ; therefore, instead of at- 
tributing the full, spreading, wide-ribbed chest, posteriorly, as 
instrumental to the lungs, the space for the expansion of the 
stomach must not be overlooked, a large digestive apparatus 
being required for all large herbivorous animals. The heart is 
an important organ in the animal frame. It is rarely found over 
large in the fat animal. It is the forcing pump by which the 
whole of the body is irrigated through the arterial tubes. If 
symmetrical organization pervades throughout the animal, the 
chances are that the vascular action will harmonize over every 
part, and the deposit of fat will equalize over the whole of 
the body. On the contrary, an animal with disproportionate 
parts will have a greater disposition to lay on muscle or fat on 
those parts respectively that have the greatest share of vascular 
action. 
I am now proud to state some indisputable facts. I have many 
times examined animals by mediate auscultation, with capacious 
chests anteriorly, and the lungs duly inflating them. Previous 
to their being stall-fed, they have, when slaughtered, lungs 
small posteriorly. It is also certain that if an animal dies well 
the lungs will be found disproportionate to what they must have 
been in the living animal. 
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VOL. XVI. 
