Intelligence and Miscellaneous Articles, 405 



procured in Paris in sufficient quantity for the preparation of tellurium, 

 is of the variety called in collections Blatter-erz and Auro-plumbiferous 

 tellurium -, but it is not the same as that analysed by Klaproth, and 

 ought to form a peculiar species. 



This mineral comes from Nagiag j it is in curvilinear and inter- 

 crossing laminae, disseminated in crystallized rose carbonate of man- 

 ganese and white quartz ; its colour is iron black, approaching lead 

 gray ; it is shining. When it contains no gangue its specific gravity 

 is 6*84. It gave by analysis, 



Gold 67 or Telluretted gold 19*7 



Tellurium 13-0 Sulphuret of lead 72*9 



Lead 63*1 Sulphuret of antimony 6 2 



Antimony 4*5 Sulphuret of copper J '2 



Copper 10 



Sulphur 117 100-0 



100-0 



Ann. de Chim. et de Phys., torn. li. p. 150. 



ACTION OF CHLORINE UPON GUM. 



M. Simonin caused chlorine to act upon gum, and obtained results 

 which differ from those described by M. Guerin. Four ounces of 

 white gum Senegal were dissolved in about a quart of water, and the 

 solution was put into a long-necked flask f in twenty-four hours more 

 than 12000 cubic inches of chlorine gas were passed through it; the 

 solution became gradually colourless, was afterwards turbid, and had 

 an opaline tint, which it retained to the end of the operation. After 

 repeated operations, and the separation of the muriatic acid formed, 

 M. Simonin obtained an acid which he thinks was somewhat ana- 

 logous to that obtained by M. Guerin from the action of nitric acid 

 upon gum ; and sugar yielded when treated in the same manner a 

 similar acid. — Ann. de Chim. torn. 1. p. 319. 



MR. B. BEVAN ON COVENT GARDEN MEASURES. 



Leighton, Jan. 15, 1833. 



To the Editors of the Phil. Mag. and Journal of Science. 



Gentlemen, 



Expecting that one of your numerous contributors residing in 

 London would have favoured the public, through the medium of 

 your Magazine, with a reply to my inquiries respecting the mea- 

 sures used at Covent Garden Market, I deferred sending the result 

 of my observations on that subject. But no person appears to have 

 considered it of sufficient importance, although these measures are in 

 very extensive daily use, and though almost unknown|in the country, 

 are referred to in most of the reports on the prices of articles 

 sold at that market, both in the public newspapers and in the Gar- 

 deners' Magazine. 



I therefore hope the subjoined statement of these measures will 

 be acceptable, at least as approximations, until some person will 

 take the trouble to determine them more correctly. This state- 



