25 
REVIEW. 
Quid sit pulchrum, quid turpe, quid utile, quid non.— Hon. 
The Microscopic Anatomy of the Human Body, in Health 
AND DISEASE. Illustrated with numerous Drawings in Colour. 
By Arthur Hill Hassall, Author of a “History of the 
British Fresh Water Algse;” & c. &c. Highley, 32, Fleet- 
street, London, 1846. Parts I & II. 
Works performed in that department of anatomy denominated 
“ general/' in which category comes the one whose title is super- 
scribed, interest equally students in veterinary and human me- 
dicine. Bones, muscles, membranes, fat, hair, See. are essentially 
the same substances, examine them in what animal we may. The 
several component tissues and structures of the higher classes of 
animals — the mammalia — are found to present a striking unifor- 
mity of aspect and composition ; insomuch that any person who 
has once inspected bone or muscle or membrane in one of these 
animals, immediately recognises the correlative part in another. 
Nay, should he prosecute his inquiries in the character of physi- 
ologist as well as of anatomist, he will discover analogy between 
such parts in use as well as in composition ; and may, in a general 
manner, safely deduce inferences, in these respects, from one ani- 
mal body to another. Making allowances for circumstances, he 
will, as he widens his sphere of inquiry, discover that Nature, 
ever true to her purpose, has kept all through the congeneres the 
same wise end in view, though the means and appliances may have 
been modified to suit the convenience or advantage of the species. 
The analogy which strikes our observation as existing between 
the correlative solids of different animal bodies is yet more con- 
spicuous between the corresponding fluids, it not being in the lat- 
ter, as in the former, liable to disturbance from any special pecu- 
liarities. Blood to our ordinary vision is the same red homogene- 
ous-looking fluid, be it seen flowing out of the veins of a man or 
an ox, a horse or a dog : bile possesses much the same yellowness 
and viscidity in one as in the other of these animals ; milk, the 
same white aspect ; urine, the same outward characters. Nor are 
we apt to perceive any differences between these fluids, respect- 
ively, in the mammalia of different species, until we come to 
submit them to the test of chemical assay, or to more critical in- 
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