Foreign Literature and Science, 393 



a right to a proof of each of the plates purchased by the so- 

 ciety ia the course of the year. The objects of art, acquir- 

 ed by the society will be exposed to view, before the 

 drawing of the lots. Although the society is in its infancy 

 the number of shares subscribed for already, amounts to 

 150. A number of distinguished foreigners have taken 

 shares. 



32. Wire Drawing. — The common method of drawing 

 cylindrical wire, consists in forcing the metal through circu- 

 lar openings in plates of iron, steel, or some other metal; 

 but it is soon observable, that the whole gets worn or de- 

 formed, and that the wire then ceases to have the desired 

 regularity. Mr. Brookedon of London has nearly remedied 

 this inconvenience by passing the metallic thread through 

 conical holes made in diamonds, sapphires, rubies, or other 

 hard gems. It appears to be unimportant whether the wire 

 be introduced at the large or the small opening of the con- 

 ical hole, but the best results, upon the whole, are obtained 

 when the wire is entered by the smaller base, and drawn 

 through the larger one. 



33. Hops. — The valuable discovery of Dr. Ives of New- 

 York, on the powder of the Hop, as announced in his me- 

 moir, published in volume II. p. SOi. of this Journal, has 

 excited considerable attention in Europe. M. M. Payen 

 and Chevalier, two French chemists, have made some re- 

 searches upon the yellow powder (the Lupulin of Dr. Ives,) 

 which they consider as composing one tenth of the hop. 

 They recognize in it the follovvfing principles. 



Essential Oil, about - - - .02 

 Sub. Acetate of Ammonia - - - 

 Gum - - - . - , 

 Malate of Lime . _ . 



A bitter principle - - - . .125 

 A well characterised resin - - .525 

 Silex ----.. .040 

 Traces of a fatty matter, and some salts. 



We limit ourselves (say the editors of the Annales de 

 Chimie,) to a statement of these results, without any other 



Vol. VL— No. 2. 60 



