ACTION OF POISONS ON THE ANIMAL SYSTEM. [ 



sight. To mention one singular instance of this kind. The Remarkable 

 very simple improvement of expressing the powers and roots J^p" ta ^ ion 

 of quantities by means of indices introduced a new and general in a child. 

 arithmetic of exponents ; and this algorithm of powers led the 

 way to the invention of logarithms, by means of which a'l 

 arithmetical computations are so much facilitated and abridged. 

 Perhaps this child possesses a knowledge of some more important 

 properties connected with this subject ; and although he is 

 incapable at present of giving any satisfactory account of the 

 state of his mind, or of communicating to others the know- 

 ledge which it is so evident he does possess, yet there is every 

 reason to believe, that, when his mind is more cultivated and his 

 ideas more expanded, he will be able not only to divulge the 

 mode by which he at present operates, but also point out some 

 new sources of information on this interesting subject. 



The profits of the present print will be given to the father of 

 this child, in order to enable him to provide a more suitable 

 education for his son : and it is hoped that the friends of science, 

 and the public in general, will promote a plan, which promises 

 to be attended with such advantages. 



III. 



Farther Experiments and Observations on the Action of Poisons 

 on the Animal System. By B. C. Brodie, Esq. F. R. S. 

 Communicated to the Society for the improvement of Animal 

 fihemistry, and by them to the Royal Society. 



{Concluded from p. 268.) 



IV. Experiments with the Muriate of Barytes. 



Baryt.es poi- 

 HEN barytes, is taken into the stomach, or applied to a sonous, but 

 wound, i>t is capable of destroying life j but when in its 8 aits!° 

 uncombined state its action is very slow. The muriate of ba- 

 rytes, which is much more soluble than the pure earth, is (pro- 

 bably on this account) a much more active poison. ' Exp 3 jyr u . 

 Experiment 5. Ten grains of muriate of barytes rubbed very 



fine, 



w 



