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C 424 j 
XXIV. Some additional experiments and observations on the 
relation which subsists between the nervous and sanguiferous 
systems. By A. P. Wilson Philip, Physician in Worcester. 
Communicated by T. Andrew Knight, Esq. F. R. S. 
Read June 15, 1815. 
In a paper which I had the honour to lay before the Royal 
Society, I observed that M. le Gallois founds his explanation 
of many of the phenomena which he describes in his Treatise, 
Sur la Principe de la Vie , &c. on the supposition that the circu- 
lation nearly ceases in any part when that portion of the spinal 
marrow from which it receives its nerves is destroyed. The 
accuracy of this supposition many circumstances led me to 
question. It is easy to subject it to the test of experiment. 
Exp. 1 . The spinal marrow of a frog was destroyed by mov- 
ing, in various directions, a wire introduced into the spine by a 
hole made in the lowest part of it, and passed up into the brain. 
The animal was immediately deprived of sensibility and 
voluntary motion, and appeared to be quite dead. After it 
had lain in this state for several minutes, part of the web 
of one of the hind legs being brought into the field of a 
microscope, the blood was seen circulating in it as rapidly as 
in the web of a healthy frog. In making such experiments 
it is necessary to be aware, that handling and stretching the 
web tends to impair the vigour of the circulation in it. If 
this experiment is objected to on account of its being made on 
