856 Abstract of .Mr. Faraday’s Experiments on the 
tllation, onee or twice in this way, it was found, on after-ex- 
amination, that very little of the salt remained undecompo- 
sed. 'The|process requires care. . I have had many explo- 
sions occur with very strong tubes, and at considerable risk. 
.{ When. the tube is cooled, - itis — to contain _ 
fluids, and a very com compressed atmosphere. The. hea 
fluid, on examination, proved to be Sates: with a little seid 
ope nitrous oxide in solution; the other was nitrous oxide. 
t appearsin.a very liquid, limpid, colourless state ; and 
50 volatile that.the warmth of the hand generally makes it 
disappear in vapour. — application of ice and salt con- 
denses abundance, oto the liquid’state again. . It boils 
ee sie the differenee of temperature between, 50° and 
| It does' not appear to have any tendency to solidify at 
salons Lis refractive power is very much less than that of 
water; and less than any fluid that has-been yet obtained in 
these experiments, or than any known fluid. A tube being 
opened: in, i air, ben nitrous oxide immediately burst into 
va 
» Rhe he pressure of it its s vapour is equal to above fifty atmos- 
pheresiat 48° iin ¢ 
iat Si pure eyanuret of mercury was heated 
was then inetosed in snap 
id; notyappear to be very great; and npr hi wen ot 
Lager showraess into the. state of vapour, pa 
ed up wit with; event Shaan at one 
, and.a-drop of water at the sciene: the fluid cyanoge? 
=a epeogaes ineontact with, the Rupe vt sg iv 
in} considerable ¢ quantity, w t, Bure; 
but floated on. it,cbeing., lighter, though. apparently not S° 
much, $o,as, ether a ‘In the course of some day sy syac- 
tion had. taken, place, the water had become black, and 
cliiages, ptohably stich as are _kngwn to take place in a" 
