52 Scientific Intelligence. 
tures, but is very slow, continuing for months. The resulting — 
solution contains only normal zine sulphate, no basic salt being — 
present. A dark gray powder is deposited, however, which com — 
filled with fragments of glass. The capsule is placed in a sand 
0° to 200°; the sublimed salt attaches It 
self in brilliant crystals to the sides of the capsule and the pee ; 
cover, a portion also passing through and covering the glass. 5 
composition was verified by analysis. That this is not a dissocl& — 
tion into ammonia and nitric acid is shown by the fact that the 
paper is not attacked.— C. R., Ixxxii, 932, April, 1876. GF. Bo 
6. Additional facts concerning Gallium.——Bo1sBAUDRAN, the 
grams of the crude material. Unlike the specimen first made _ 
and which was solid owing to impurities, the author finds pute — 
gallium to be essentially a liquid metal, since it melts at 29°55 
and is therefore easily liquefied between the fingers, It exhibits 
markedly the phenomenon of surfusion, a globule remaining — 
to zero, 
though easily cut and somewhat malleable. When melted it 
adheres strongly to glass forming a whiter mirror than mercury: 
Heated to redness in the air, it oxidizes only superficially and does 
not volatilize. It isnot sensibly attacked by cold nitric acid. Its : 
density is 4°7 at 15°. Deposited on platinum by electrolysis from — 
solution in ammonium or potassium hydrate, it presents a grayish ; 
white mat surface, formed of minute globules. Cold dilute hydro 
chloric acid dissolves it, disengaging hydrogen; but the residue — 
obtained by evaporating this solution, is not colored by potassiu® — 
] 
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