SCIENTIFIC NEWS. 





159 



f 







in vegetables a peculiar and distinct principle, to which che- 

 mists have given the generic name of extractive. 



Ought we to retain the old classification of pharmaceutic 

 extracts; divided, according to Rouelle, into gummy, re- 

 sinous, gummy-resinous, resino-gu m my, and saponaceous? 



Can we establish a more methodical and ace urate, classifi- 

 cation by the help of chemical experiments on the princi- 

 pal substances, that furnish the apothecary with extracts? 



To indicate, from the nature of their different constitu- 

 ent principles, the mode of preparation that agrees with 

 each of them, and the nature of the menstruums that should 

 be employed. 



2. What is the present state of pharmacy in France? 

 What part does it take in the art of healing? and of what 

 improvements is it susceptible? 



The prize for the first is a gold medal of the value of 200 

 francs [^8 Gr. $d.] ; for the second, a gold medal of the 

 value of 100 f. [\£4 3s. Ad.]. The answers to each are to 

 be sent, post-free, to Mr. Sureau, secretary to the society, 

 rueFavart, No. 18, before the 1st of October next. 



Dr. George Pearson, F. R. S., senior physician to St. MedicaUnd 

 George's Hospital, recommences his course of lectures on l u ^ 

 Physic and Chemistry, at No. 9> George street, Hanover 

 square, on the 4th of June, at the usual morning hours; 

 namely, the medical lectures at 8, and the chemical at 9. 

 A chemical lecture on the cases of patients of St. George's 

 hospital is given every Saturday morning at 9; and the 

 practice of vaccination is carried on in Broad street, Golden 

 square. 



chemical leo- 



rt 



To Correspondents, 



Mr. Verschoyle's paper, dated the l6th of April, did not 

 come to hand till the 26th of May, I shall be happy to 

 receive an account of his progress, and at the same time 

 should be glad of a more precise representation and de- 

 scription of his apparatus. Perhaps Articles IX and X of 

 our present number may afford him some hints on the sub- 

 ject of his inquiry. 



METEOROLOGICAL 



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