68 Scientific Intelligence. 
a a large proportion of water is contained in the porous structure of 
meteorites, and he and Prof. Smith have also detected es air 
of carbonaceous substances in ae odies. hen meteor 
is raised to a high temperature by coming into nthe with our 
orm 
meteorite would thus enclose gases at a high pressure. Since all 
the planets are also immersed in the supposed atmosphere—of Dr. 
Siemens, an erial current should form constantly in the northern 
hemisphere from the northeast, and in the southern from the 
southeast. These currents wou e opposed to the “return 
trades.” Mr. Cook discusses the dissociation effects in the atmos- 
phere of the sun, and finds that the oo of the gases pro- 
jected into space would be very different from that supposed 
Dr. Siemens. The s ectroscopy of the pve moreover affords no 
evidence of Dr. Siemens’ hypothesis.— Phil. Mag., June, — Bi 
400-405. 
8. Lffect of Pressure on the melting point of ice. Thee 
ment of Bottomley, which apparently oe the fact char ih in- 
creased pressure lowers the freezing point of water, is well-know 
A wire weighted at both ends is thrown over a cake of ice saa 
cuts through it. The ice melts beneath the wire and freezes pis 
creased pressure lowers the freezing point. A silk wire, weighted 
to the same amount as a metallic wire, will not cut ae a 
9° of ic 
pha eh 293 | i 12 
V, Die galvanischen Batterier Accumulatoren und Thermo- 
oa en, eine Beschreibung der hydro- und thermo-elektrischen 
Stromquellen mit bent igice! Reocksicht ~~ die Bediirfnisse der 
raxis von W. Ph. Hauck. 320 pp. 1 
XI, Die elektrischen Beuacbiears 4elage en mit besonderer 
Bercksicht pa, ri ihrer ee ne dargestellt von 
Dr. banitzky. 240 pp. 12mo.—The first volume of this 
bine series of works on the cent applications - 5 proraaay 
was noticed in the February number, and the special’ design of 
the series was there alluded to. The four volu i te gs ntly re-_ 
ceived cover some of the most important of the topics, and their 
scope will be gathered fon the titles which are given above in full. 
