Chemistry and Physics. 141 
which indicated the presence of oxygen compressed and frozen in 
the gaseous state. 
The success of this remarkable and conclusive experiment called 
forth the applause of all present. 
We understand that Messrs. Pictet & Co., of 22, Rue de Gram- 
mont, Paris, are fitting up apparatus with the intention of having 
these experiments repeated at their Freezing-Machine Works, at 
Clichy, in Paris.— Chemical News, . 4. 
‘ Liquefaction of Oxygen, Nitrogen and Hydrogen. 
Experiments of M. Cailletet. (From Nature, of January 3d 
of 300 atmospheres and at a temperature 0 This result 
was ommunicated to the Acade at t was con- 
signed to a sealed packet on account of M. Cailletet being then a 
candidate for a seat in the Section of Mineralog ence, then, 
credited to both, on the ground that the researches of each were 
absolutely independent, both pursuing the same object, creating 
compressed. The remainder of the space in the large cylinder is 
occupied by mercury. M. Cailletet’s process consists in com- 
Was at once formed. The same result has since been obtained 
Without the employment of sulphurous acid, by giving the gas 
time to cool after compression. 
