Medicinal Leeches. 389. 
plates, at five francs upon common paper. In an economi- 
~ point of view this process deserves to be recommended. 
{Other extracts from Foreign Journals.} 
3. Medicinal Leeches.*—A report has lately been laid be- 
Pc ‘thie French Academy of Sciences, b uméril and 
Latreille, on a memoir by MM. Pelletier and Huzard, jun., 
containing researches upon leeches, 
The authors of this memoir had been commissioned to ob- 
tain said ome for the civil authorities relative to the means 
ics the little wens made by hse satinats difficult to 
cure. 2dly, To examine the circumstances under which cer- 
tain leeches do not penetrate the skin to which they are ap- 
lied. On the first point authors agree with physicians in 
acknowledging that the inconveniences ascribed to leeches 
ought most frequently to be desis Bt either to the tempera- 
ment of the patient, or to the of the malady, or the 
means employed to detach shia rom the wound, or to the 
= substances employed for — the blood and 
osing the wound. With regard to the second point, MM. 
Hepa and Pelletier have found that there are offered for 
3; Qdly, in tne eantirmatis an of their stomach and 
= ocat canal. The experiments of the authors have 
proves to them that the spurious leeches cannot be employ- 
_* This article, and the next succeeding, are copied from the London 
Philosophical Magazine and Journal. 
