ctt'ritractmg 23 times in a minute, was immersed into an Effects of 

 ounce of the above solution, of the temperature of the j*^^^^™ y^^p^^ 

 room ; "four jniftutcs after immersion, it exhibited eighteen 

 ''Contractions in a minute : ten minutes after immersion, six 

 ^"i^glit contractions, and after twelve minutes had entirely 

 ''deased, and could not be excited anew to contract. 

 ^^"Exp. 3.* Another heart immersed in an ounce of a 

 ^tfonger sokition, only exhibited three or four strong con- 

 tractions, on the period of immer&ion, and afterwards wa* 

 Irritated in vain. 



"^ Exp. 4.+ The heart of another rabbit was placed in a 

 'Iji^ne glass and three drams of the strong solution poured 

 o'tt, whilst contracting 50 times in a minute: after three 

 minutes spontaneous contractions had ceased, but irritated 

 Vith a needle' a few contractions were excited : after the 

 "tapse of five minutes no contractions could be excited. 



In order to examine how far the opium contained in the 

 solution contributed to produce the above rapid exhaustion 

 of irritability, 



Exp. 5.+ The heart of a frog, contracting 24 times in 

 a minute, was placed in half an ounce of water, temper- 

 ature 44^. It continued to contract in the vrater for 16 

 minutes, and when removed, contractions could be excited 

 in the organ, by mechanically stimulating it, for the space 

 «>f six minutes longer. 



Exp. 6.§ The heart of a rabbit contracting 50 times in a 

 /ninute, was placed in water of the temperature of the room. 

 It contracted spontaneously for 20 minutes, and when re- 

 moved contJRued irritable for the space of 10 minutes 

 longer. 



Can the Effect of Opium be communicated to distant Paris 



independeut of the Assistance of the Circulation? 



Exp. 7. II The sternum of a frog was carefully elevated 



xftd the heart removed, forty drops of the strong solution 



w«re injected into the stomach. In 15 minutes the aaima! 



- * Vid. p- 10. Inaugural Dissert. Exp. 7. 



t Vid. p. 10 & 11. Exp. 8. 



% Vid. p. 6. Exp. 3. Inaug. Dissert. 



§ Vid. p. 8. Exp. 6. II Vid. p. 28. E.vp. SO, 



YoL. X\a,-JMAy^ 1807. 5E was 



