124 MEMOIR OF THE LATE DR. HENRY. 
Although impelled by a strong predilection to 
the pursuit of chemical science, Dr. Henry was 
not an inactive member of the profession, to 
which he belonged. Besides contributing to 
the medical journals of the time, such interest- 
ing cases of disease as fell under his observation, 
as physician to the Manchester Infirmary and 
other public charities, he engaged in an elabo- 
rate investigation of that important class of 
maladies, which affect the urinary system,—the 
exact diagnosis of which is well known to rest 
on indications purely chemical. His inaugural 
discourse on uric acid; his analyses of many 
varieties of calculi; and his Essay on Diabetes, 
were favourably received by the profession, and 
are still cited with approbation by our best 
pathologists. Even after having relinquished 
the exercise of medicine, he continued to feel a 
deep interest in its advancement, and on a late 
occasion when the ravages of Asiatic cholera in 
neighbouring countries suggested the necessity 
of preventive measures on our own coasts, he 
established by experiments, as satisfactory per- 
haps as the nature of the enquiry admitted, the 
destructibility of various contagious poisons by 
degrees of heat, inferior to the boiling point of 
water. It is due, however, to his philosophical 
caution to state, that Dr. Henry regarded these 
