PROCEEDINGS OF THE POLYTECHNIC ASSOCIATION. 509 



tures. The author concludes that compound gases cannot exist at 

 very high temperatures. 



Platinum-coated Copper Vessels. 

 As platinum is the only metal used in the concentration of sul- 

 phuric acid, it has long been a desideratum to coat other metals 

 with platinium. All experiments in this direction have failed until 

 lately. It is now amiounced that platinum coated copper vessels 

 are manufactured in Berlin at about one-sixth of the vessels of pure 

 platinum of the same size. 



A New Saccharine Body. 

 One of the advantages arising from the typical classification oF 

 chemical compounds, is the new suggestions naturally occurring 

 to those who compare bodies in their new relations as chemical 

 structures without regard to chemical functions. An interesting 

 case, in point, is the late researches of Mr, L. Carius, of France, 

 concerning bezol Ce He earl. Viewing sugar as a hexatomical 

 alcohol, it consists of a radical Cg Hg" united with the hyrate of 

 the sixth degree, the author was led to make a series of experi- 

 ments which prove that benzol may be converted into a sugar-like 

 body which is not, however, grape, sugar, nor any other generally 

 known compound, but a new body to which he has given the 

 name of PJunose. He combines benzol directly with hypochlo- 

 rous acid [edat), and forms the compound he calls trichlor-hydrine 

 ofPheuose (earliltid.) Three atoms of hydrate of potash. Kg Hg 

 O3 {PoUimilt) will eliminate the three atoms of chlorine which 

 unite with potassium forming three atoms of chloride of potassium, 

 while three atoms of hydroxyl or tit unite Avith ilt, thus producing 

 the new compound (C^ Hg), H^ Og. Besides this compound, 

 benzoic acid is always formed. Purified Phenose has a sweetish 

 taste, like grape sugar, and is as easily oxydized as the latter body. 

 It does not, however ferment iu contact with yeast. 



New use for Napthalin. 



This compound, Cio Hs (euretl), which passed through a red hot 

 tube is decomposed, and yields mash gas, or two atoms of C H4 

 (arol), leaving eight atoms of carlion in the form of a fine soot, 

 which Klentinsky suggests might be used for Indian ink. Nap- 

 thalin (euretl), when fused, swells up and dissolves India rubber 

 with great facility. 



