428 Scientific Intelligence. 
point of the chlorid of calcium. The calcination may even be made in 
glass vessels. The production of oxygen from this source is very regular 
and unattended with danger, The process is moreover economical as 
compared with those commonly employed by chemists;—in the experi- 
ments of the authors the cubic metre [35°316 cubic feet] of oxygen when 
epdess from black oxyd of manganese cost about four francs, from chlo- 
rid of lime five francs, while from chlorate of potash it could not be ob- 
tained for less than ten franes; but the process is nevertheless far more 
expensive than their sulphuric acid method, the cubic metre of oxygen 
aving cost in this case not more than one or two francs,—and in prac- 
tice the price would probably be much less than this, since the sulphurous 
acid might readily be utilized. 
orthy of remark that the oxygen Lah geass —_ — acid 
—e 
3 
the simplest explanation of the shinidistouk appearances which mr be 
noticed and the precautions to be followed in the preparation 
butter, was to be found in the supposition that the original ‘albuminous 
m - 
offers experimental results, of which the following table is an abstract: 
As Mitscherlich proved long ago, ether dissolves only mere traces of fat 
when shaken with milk as it comes from the cow, and dissolves so muc 
the more fat in proportion to the length of time that the milk hes been 
t. 
ep 
This milk, which for the be % Wii hel had been diluted with 
an equal volume of water, ether in the mth hour after milking, 
in the vth hour after it had pee hitated with water, and after it had been 
mixed with ether for one hour,* / per cent of fat. 
No. m. v. Fi 
la. 2 1 O65: 
bo By 14 13 FAG soe 
2a. 18 z 085 
b. 38 21 1°52 
¢ 61 44 2:08 
3a, Gh 2: x 2°56 
b. 86 1 4°52 
oi 109 1 4°56 
The temperature of the laboratory during these experiments was 15° C. 
[=59 F.]. No. 3a, eurdled while being shaken with ether, 36, and 3c, 
were aces sour; the other samples were fresh and sweet when treated, 
[* spt ain with ether the author shows that h 1 
i oe ee porate 
amounts of inpen dodinaied ie in the table “00 ied Sacinalond 
ever no ccockeon: Saag aniston point in a : 
