'^ Oil the 'Efetts of Opiiim 



of eath oth^r. As by those conclusions if w^ s 

 proved that opium produced an effect upon 

 the body similar to stitilulants, attd'^^s it isrnow 

 proved by conclusions 4th, 5th & eth, p. 9^5/^ 

 that the sedative effect of cold e^ibits ap- 

 pearnces and induces a condition of the body 

 opposite to those which were observed under 

 the operation of stimulants, that'as the analogy 

 held' good betwixt stimulants and^ opium in 

 every instance where' we -subjected theni to 

 experiment; and that in those instances, 

 where we have compared the effect of sedatives 

 as exhibited likewise by experiment, the analogy 

 has altogether failed; it is to lie inferred frbm 

 thence, that the effect of opium is inversely as 

 the effect of sedatives, and directly as the effect 

 of stimulants. 



To trace the analogy somewhat further, ft 

 appears by experiment 47, 48 & 4^, as has al- 

 ready been observed, that frogs and other ani- 

 mals whose excitability is abundant, can sustain 

 life in a temperature beneath the freezing 

 point, and also by experiment a. b. c. section 

 2d. — ^That young animals whose excitability is 

 more abundant than adult ones, can support 

 life under greater degrees of cold than adult 

 animals; we further conclude, that the effect of 

 sedatives is directly at the excitement, and 

 inversely as the excitability: Furthefi a^ it i^ 



