EXPERIMENTS 
AND 
OBSERVATIONS 
ON THE 
EFFLORESCING PROPERTIES 
OF SOME 
SALTS OF SODA. 
By HENRY HOUGH WATSON, 
Corresponding Member of the Society. 
Communicated by Dr. Darton. (Read, March 18th. 1836.) 
Sopa being extensively used in some of the 
arts, disputes frequently occur between the 
manufacturers and the consumers of it with 
regard to its strength. When, by analysis, the 
consumer finds it to be of a less degree of 
strength than it was sold to him for, and to con- 
tain a considerable per centage of water; he 
