434 
Facts and Observations. 
ON THE PRESENCE OE IODINE AND BROMINE IN WATER 
OBTAINED EROM THE ATMOSPHERE. 
M. Marchand, from a series of experiments instituted 
by him, has come to the conclusion that both iodine and 
bromine constantly exist in atmospheric water, whether 
obtained from snow or rain. The greater quantities of these 
elementary bodies would appear to be present during storms. 
4 
CHLORATE OE POTASH LOTION IN CANCEROUS AND 
OTHER ILL-CONDITIONED ULCERS. 
Mr. Weedon Cooke, of the Royal Free Hospital, is in 
the habit of successfully employing a lotion, for the healing 
of various kinds of ulcers, which is composed of — 
Chlorate of Potash, ^ss ; 
Hydrochloric Acid, I7\xl ; 
Sedative Solution of Opium, 5ij ; 
Water, Oj. 
In veterinary practice it has been common to use the 
nitrate of potash for the same purpose. If to its solution 
from forty to sixty drops of nitric acid be added, a more 
effective compound will be obtained. 
It is somewhat singular, that all the therapeutics employed 
as excitants to wounds are compounds into which a highly 
electro-negative enters, this being either oxygen, chlorine, or 
iodine. 
Go through the whole list, you will find this to obtain. 
And in addition, it may be observed, that the greater the 
relative amount of the electro-negative agent present, so will 
be the stimulating influence of the compound. 
Of these, perhaps, oxygen plays the most important part. 
It has therefore been thought that their influence depends 
upon the communicating of these elements to parts in which 
there is a deficiency indicated by sluggish action and an ill- 
conditioned appearance of the wound ; and thus it is that the 
healing action is brought about. 
On the other hand, when there is a redundancy of this 
