27 S Experiineiit.' ami Oherualioiis on 



good test of the presence of potash, and has hceii long 

 known to form triple compounds with some of the srIis of 

 potash and ammonia, I made cxpesiments on all the salts 

 of potash and i'mmonia I could procure, to ascertain whe- 

 ther there were any excepiions to such decompositions. 



The aqueous solution oi muriate of platiiia, 1 found, pro- 

 duced a yellow precipitate in the acetate, phosphate, suc- 

 cinate, prussiaie, sulphate, nitrate, 8cc. of these alkalies, 

 which appeared to he in all cades precisely similar in is-i 

 sensible properties. I therefore presume, it may be stated 

 as a general fact, that the muriate of piatina occasions a 

 precipitate in all the salts of potash and ammonia; and that 

 the e:;cepiions are merely apparent, arising from tiic use of 

 diluted solutions, and founded on the solubility of the triple 

 salts formed. 



[To be continued.] 



XLVIII. Further Experhneiits and Observations on the 

 miction of Poisons on the Animal System. By B. C. 

 Brodie, Esq. F.R.S. Conununicated to the Society for 

 the Improvement of Animal Chemistry, and by them to 

 the Royal Society *. 



OiNCE I had the honour of communicating to the Royal 

 Society some observations on the action of certain poisons 

 on the animal system, I have been engaged in the lurther 

 prosecution of this inquiry. Besides some additional ex- 

 periments on vegetable poisons, I have instituted several 

 with a view to explain the effects of some of the more 

 powerful poisons of the mineral kingdom. The former 

 correspond in their results so nearly with those which are 

 already before the public, that, in the present communica- 

 tion, 1 shall confine myself to those which apjicar to be of 

 some importance, as they more particularly confirm my 

 former conclusions respecting the recovery of animals ap- 

 parently dead, where the cause of death operates exclusively 

 on the nervous system. In my experiments on mineral 

 poisons, I have i'ound some circumstances wherein their 

 effects differ from those of vegetable poisons, and of these 

 1 shall give a more particular account. Whatever may be 

 the value of the observations themselves, the subject must 

 be allowed to be one that is dcservipg t^f investigation, as it 

 does not appear unreasonable to expect that such investi- 

 gation may hereafter lead to some improvements in the 



* From Philosophical Transactions for 1812, part i, 



healinj: 



