BOHAN, OR BOHAN-UPAS. 281 



M. Vauquelin has also made some experiments of this hind : at 

 the end of his chemical ?miiysis of the juice of the belladonna, he 

 speaks of the effects of this substance on animals. Those which he 

 forced to swallow if, fell down as if intoxicated, in a delirium pre- 

 cisely similar to that produced by opium. 



M. Sage has reported on the ssme subject some more experiments, 

 which ciiance threw in his way, or which he collected from others, 

 and which coniirm the action of this juice on ihe nervous system, 

 and particularly on the bruin. 



A young practitioner in medicine, whose name has been men- 

 tioned in former annual reports, M, Nysten, has attemoted to ascer- 

 tain the effects of different gases injected into the blood-vessels of 

 animals : he used the greater part of the gases with which we are 

 acquainted. Atmospheric air, oxygen gas, the oxidulaied azvtic, 

 carbonic acid, carbonic, phosphuretted and hydjogenated gase&, &c. 

 are in no respect deleterious. The oxy. muriatic, nitrous acid, and 

 ammoniacal gases, seem to act by very violently irritating the right 

 auricle and the pulmonary ventricle. The sulphureth ! hydrogen, 

 oxide of azote, and azotic gases, injure the contrao'ile power of 

 these parts : others also change the nature of the blood so com- 

 pletely, that respiration can no longer convert it from teiicus blood 

 into arterial, &c. 



[Mem. de St. lnstit. Nat. I8O9. 



