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4 
Chemistry and Physics. 399 
with silver nitrate, an abundant precipitate of silver hyponitrite, 
AgNO, is thrown down 
hyponitrite is good and the author recommends this process as 
much preferable to that by sodium.—Ber. Berl. Chem. Ges., xii, 
1509, Sept., 1879. G. F. B. 
On the Direct Union of Calcium oxide and Carbon dioxide. 
is well known that at a high temperature, calcium oxide 
unites directly with carbon dioxide, while they have no action at 
BAU d 
weight was constant. Pure dry carbon dioxide was passed over 
lain tube, and afterward in a bulb of Bohemian glass, the heat 
being that of a paraffin bath heated from 160° to 320° C. 
five to eight hours, 100 parts of lime absorbed 4"1 per cent coO,, 
after thirteen hours 15:2 per cent, after forty hours 31-6 per cent 
i 1 
0011 grams; but farther heating did not increase this quantity. 
e temperature of union and of dissociation of calcium carbonate 
the new Element, Scandium.—CiBvE has studied the 
: : . . . AY? 7 
new earth scandia, discovered by him, a few weeks after Nilson’s 
announcement of it, in gadolinite and yttrotitanite, t 
Sc,O,, ammonio- and po : 
sulphates, and also the oxalates and selenites, establishing it. 
From eight to ten grams of scandia, by repeated decom ositions 
of the nitrate, one gram of a white earth was obtained. is was 
Converted into sulphate and calcined; 1451 grams gave 0°5293 of 
Scandia, which gives for the atomic weight of scandium 44°01, 
Scandia i 
ndi 
Weight 45°94; differing essentially from 105°83 the minimum 
