MR. B. CLARKS HIPPODONOMIA. 
631 
shewing the rapidity with which this substance traversed the 
lungs. 
Nine grains of sub-carbonate of ammonia in water were then 
injected, when the indications of drunkenness immediately dis¬ 
appeared, and a very remarkable comatose state succeeded. The 
animal lay down, and continued so a long time. The horse 
seemed to be frequently attempting to swallow, and he sneezed 
often with cough. In four hours all these appearances ceased, 
and he ate with appetite. 
This experiment was twice repeated, with similar results; but 
after the last injection, the breathing became exceedingly laborious, 
and the horse manifested symptoms of water in the chest: on ap¬ 
plying the ear to the trachea on the side of the chest, the fluctuation 
of the water could be distinctly perceived. The animal died on 
the following day. 
On opening him w T e found a large quantity of bloody serum 
effused in the chest. The pulmonary tissue was hepatized in 
some parts, and emphysematous in others, and there were innume¬ 
rable miliary tubercles in the parenchyma. The trachea was much 
flattened at its entrance into the chest, and the tissue of the heart 
was pale, and torn with the greatest ease. The internal membrane 
of the right auricle and ventricle was of a deep red colour. The 
brain was almost fluid, the white pulpy substance was spotted with 
red, and the cerebellum and spinal chord were-yet more softened, 
The cinerititious part w as of a deep brow n-red colour. 
[To be continued,] 
Quid sit pulchrum, quid turpe, quid utiie, quid non.—H ok. 
Hippodonomia ; or the true Structure , Laics , and Economy of the 
Horse's Foot: also Podophthora, or a ruinous Defect in the 
Principles of the common Shoe detected and demonstrated by 
experiments , with a proposition for a new principle of shoeing , 
which abundant practice has since confirmed. By Bracy 
Clark, F.L.S. Member of the Royal Institute of France, 
fyc. Second edition, enlarged and improved. 
Five parts of this able work now lie before us, and the con¬ 
venient division of it into “ the structure of the foot” and “ the 
• 
effect of shoeing” enables us, without injury to the author, to 
yield to the impatience of many our readers, and to give a critical 
analysis of the first portion of this very important publication. 
Mr. Bracy Clark has long been known among us as an excellent 
classic, a good naturalist, and a perfect devotee to his profession. 
His literary and his scientific acquirements have all been brought 
