59 
had been coloured by the action of ozone. On the 26th of 
November, the day of the colliery explosion at Hindley* 
Green, this bleaching power was unusually active, and was 
made the subject of experiments both at his residence in 
Cheetham Hill, and at Mr. Worthington’s observatory 
The next day, on hearing of the explosion, he could not 
avoid regarding it as remarkable that it had occurred at a time 
when the bleaching power of the atmosphere was so excep- 
tionally active, and he appended a note of it to his observa- 
tions, though he was unable at the time to conceive how 
the two phenomena could be connected. The valuable 
suggestion, however, just thrown out by the Chairman 
showed how such a connection might exist. If, as some 
chemists suppose, the discolouration of the ozone paper is 
simply due to the vaporisation of the iodine which had been 
in combination with the starch, it is evident that when the 
state of the atmosphere was unusually favourable to the 
rapid diffusion of vapours and gases through it, the car- 
buretted hydrogen in a mine would diffuse itself through 
the air in the workings, and the iodine of a coloured ozone 
paper would evaporate much more rapidly than under 
ordinary circumstances. 
“Researches on Di-Methyl,” Part II., by William H. 
Darling, Dalton Scholar in the Laboratory of Owens Col- 
lege. Communicated by Prof. H. E. Roscoe, Ph.D., F.R.S. 
In a communication made to the Society in April last I 
showed that ethyl chloride was obtained by treating with 
chlorine, the gas di-methyl obtained by electrolysis and 
that from this substance ethyl alcohol was prepared. 
In continuation ot that paper I beg to lay before the 
Society the results of the examination of the properties of 
the di-methyl obtained by two other processes; first by 
that of Schiitzenberger, and finally by that proposed by 
Frankland, 
