I7itelli"ence and Miscellaneous Articles. 



233 



position of the animal matter, and contained in the air, expels the 

 chlorine from its combinations ; and as it acts slowly, the chlorine 

 is less capable of acting upon the animal oeconomy, but readily de- 

 composes putrid miasmata; it is in fact a true fumigation of chlo- 

 rine, only it is not strong, and much longer continued. — Annates 

 de Chim. et de Phys. Nov. 1826. 



WR. Leslie's instrument for ascertaining the specific 



GRAVITY OF POWDERS. 



In the Annals of Philosophy for April 1826, an account was given 

 of the above-mentioned instrument. The following remarks upon 

 it are copied from Ferussac's Bulletin, Dec. 1826. 



In the Bulletin des Sciences, 8^c. for September 1826, it will be 

 seen that Mr. Leslie had recently contrived an instrument for mea- 

 suring the density of powders. The description of this instrument 

 agrees perfectly with that of the stereometer invented twenty-nine 

 years since by Mr. H. Say, a highly distinguished French engineer, 

 who unfortunately fell in Egypt: it is proper to inform Mr. Leslie 

 that he has committed an error in claiming the honour of this dis- 

 covery, which he will find recorded, with the drawings and complete 

 descriptions, in the 23rd volume of the Annates de Chimie, 1797, p. 1. 

 In addition to this, the instrument has been made and frequently 

 used to ascertain densities, especially those of gunpowder, and it 

 still exists in the Ecole Poly technique. 



PRODUCE OF COPPER MINES IN CORNWALL, 



Sold at the public ticketings. 



For Six Months ending Slst Dec. 1825. 



Average produce per cent of the ores . . 7?, 



Average standard of copper £137 



2 II 



For 



