Chemistry and Physics. 65 
SCIENTIFIC INTELLIGENCE. 
I. CHEMISTRY AND PHyYsICcs. 
1. On Alloys of Gallium with Aluminum.—Lxcog DE Bots- 
BAUDRAN has been studying the alloys which gallium forms with 
lium, owing to electric action, Surfused gallium dissolves alumi- 
num even below 15°, forming very brilliant liquid or pasty alloys, 
which decompose water with great energy. Ordinarily this 
decomposition is spontaneous; but sometimes a globule of alloy 
is inert when thrown into water, while another fragment of the 
Same mass is immediately active, and even renders the first so 
and which do not act on water. After their removal, the alloy is 
less active; but if the whole is re-melted by the heat of the hand, 
the alloy regains its activity.—C. R., lxxxvi, 1240; Bull. ‘ 
iserded is completely explained by the equation Pt,Cl,=2Cl,+ 
2=6 volumes, two volumes being platinum vapor. oreover 
Am. Jour. Sc1.—Tuirp SERIES, — No. 109.—Jan,, 1880. 
