414 Scientific Intelligence. 
ing the part of Soo a sheaths, whether the extremities of 
these tubes are closed o 
(9.) Still the eiliuntiodal of ozone resulting from the passage of 
air over the naked metallic electrodes (direct ahead with the pla- 
tinum wires) is greater than that which arises from the passage of 
the air round the same electrodes, when dheiahed and closed, (no 
oN contact of the air with the naked metallic electrodes). 
Vith closed sheathed electrodes the production of ozone 
Lier cease with the length or surface of the metallic wre 
The production of ozone increases considerably w im- 
inition of the temperature at which the electrification of aks air is 
oer) “All conditions being —— = quantity of ozone produ- 
ced with a definite volume of oxygen, is always much more con- 
wid 
cm oo eight or ten times) haat that furnished by the 
e of a 
rea): The ozone predated by the obscure electrification of air, 
is accompanied by small ena: of nitrous compounds, while 
that ars is furnished by pure oxygen under the same cireum- 
stances, contains only traces. By attention to the conditions above 
described, the author has been able to construct a new apparatus, 
tract is tak en.— Comptes Rendus, lxx, 
2. Researches on Wakud —Souti TZENBERGER has communica- 
ted to the Academy of Sciences frcthice investigations of the re- 
markable compounds of platinum with carbonic oxyd, already 
noticed in this Journal, and has in addition — some new 
series of great interest and theoretical importance. Setting out 
with the view that the two compounds anand described, 
CO 
CO == PtCl,, and bey >PtCl,,* may be regarded as the chlorids 
of two diatomic radicals, the author found that ammonia unites 
each compound, forming the two new chlorids represented 
tapbattiely by the formulas, 
N,H,.CO.PtCl,, and N,H,.(CO),.P 
When heated these compounds fuse, ibding Ns ‘platinum, 
nitrogen, hydrogen and sal-ammoniac, together with a volatile 
t td eth nef pace = perris 
Phos; rid, PCl,, like carbonic oe unites — 
* Pt==19T C—=12 O=16. 
