202 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



The nitrous oxide thus solidified was rather more granular 

 than the corresponding modification of carbonic acid, and, 

 unlike the latter, would melt and boil before reassuming the 

 gaseous state. In contact with the skin it produced painful 

 blisters. Its melting-point was found to be 120 below zero. 

 Wills also made a variety of observations upon nitrous oxide 

 in the liquid state, when it appears to be very compressible. 

 Its specific gravity is about nine tenths that of water. It is 

 not mixable with the latter liquid, and it may be frozen by 

 the evaporation produced by simply blowing a current of air 

 through it. 21 A, January, 1874. 



MIXTURE OF LIQUIDS WITH EXCLUSION OF AIR. 



An apparatus for this purpose, designed by G. Schleiden, 

 consists of a glass tube drawn out to a capillary point at one 

 end, which is bent at a right angle, and then hermetically 

 sealed. This end is then fused into another wider tube, which 

 narrows toward its other end, and in which a loose fragment 

 of glass is placed. The two tubes may be filled with differ- 

 ent liquids, even at different temperatures, if desirable, and 

 then fused together; and by shaking, the fine bent point of the 

 one may be broken by the loose piece of glass, and the mixt- 

 ure of the liquids be accomplished. lSC\Dec. 31,1873, 818. 



THE ACTION OF WATER UPON OZONE. 



A very interesting paper has recently been published by 

 Schone upon the mutual action of water and ozone. Apart 

 from the details of his experiments, his results are worth no- 

 ticing, since they must be taken into account in all future 

 speculations concerning the functions of atmospheric ozone. 



Schone finds, in the first place, that not only is ozone per- 

 ceptibly absorbed by water, but that it is also partially de- 

 stroyed. Even by collecting dry ozonized oxygen over a 

 pneumatic trough, the quantity of ozone in it is diminished 

 about one fourth. Upon longer contact of the gas with the 

 water this loss may be increased, amounting in three days to 

 about one half, while at the end of fifteen days every trace 

 of ozone has vanished. 



Secondly, what is the cause of this disappearance of ozone? 

 The idea that water can be oxidized to hydrogen peroxide 

 by the ozone is disproved. In brief, it is shown that, by con- 



