40

Continued

When we know that blood is one of the most indigestable
of all aliments. It would also reject the
ceralia as they are so dissimilar to our fluids
& solids. Now the Cerealia are among the
substances most easily converted into chyle
& Cullen must be wrong. It is not necessary
here to inquire what are the peculiar
properties or qualities of animal food the
ultimate composition is of better consequence to us
and chemistry has thrown little light on the
subject of comparative nutrition. D^r Cooper of
Carlisle has given some opinions relative to the
nutritious quality of fats et&c to which I refer you
and I hope you will not forget that the
process of digestion is partly formed by the gastric
liquor. The flesh of carnivorous animals is not
so good as others. old authors have endeavoured
to account for this on the principle of
alkalescency, but this is intirely unworthy of notice.