370 Scientific Intelligence. 
gen or carbonic acid. It is not volatile, and does not melt under 
ordinary pressures, but is decomposed by heat into pentachloride 
and dichloride. At the melting point of zinc, hydrogen reduces 
it to metal. Water gives a brown oxide (we, ?) and chlorhy- 
dric acid. The dichloride, WCl,, is prepared by moderately 
of a br ox 
chlorides WCl and awe, 
The two oxychlorides, “wWecl, and W®,Cl,, are well known. 
The monoxychloride, W OCI “ forms ruby red needles, which melt 
at 210°:4, solidify at 206°°7, and boil at 227° C. Its he! 
density corresponds with theory (171). The dioxychloride is 
quid at na ft heating the brown oxide in chlorine. It remains 
Br,, but whieh’ is very readil etic te. iving a DI 
powder, which is the ery a two oxy web 
and W®,Br,, are formed reese spumeter4 by heating a mixture 7“ 
two parts of the dioxide and one part of the metal in bromine, @ 
may easily be separated by sublimation, the monoxybromide big 
much the more volatile, fusing at 27 7°, and boiling at 327 es 
is readily decomposed by water, while the dioxybromide sub 
, 18. 
n the Decomposition of Potassium Chlorate. _Bava ‘ab 
mont has investigated the conditions under which potent srith 
rate is pre when heated both alone aie when org a 
oxide, p pared by nites ipt ication, its oxygen 18 ev: voly : 
¢ 60° "wet than before) wena y but be Leet the sole solid pe 
uct being potassium chloride. No perchlorate is prod unde 
appears t that sonia substances, bach _ platinum sponge” io the 
tic oxide, and mercuric oxide, = in the least fa 4 cuprie 
ecomposition ; ; while others adnate ese dioxide ap mange 
oxide, and, in a less degree, fectio oxide, cobaltic oxide, 
