106 MEMOIR OF THE LATE DR. HENRY. 
esteem and permanent friendship, which were 
strongly evidenced, by his confiding, during ill- 
ness, his medical duties to Dr. Henry, and also 
by his making choice of him as his own attend- 
ant in the successive seizures which preceded 
his death. 
After having been thus initiated in those pur- 
suits, to which his after life was to be mainly 
dedicated, Dr. Henry was removed in the winter 
of 1795-6 to the University of Edinburgh, at 
that time in its highest repute as a school of 
medicine and of the natural sciences. The chair 
of Chemistry was still occupied by the venerable 
Dr. Black, whose discovery of the facts, that 
establish the existence of heat in a latent form, 
and whose successful discrimination between the 
caustic earths and their carbonates, had raised 
him to the highest rank among chemical philoso- 
phers. Dr. Henry was an eager hearer of the 
beautiful proelections, in which Dr. Black, with 
calm and simple dignity, unfolded in exact and 
perspicuous order, the truths of a science, which 
may almost be said to have been first called into 
existence by himself and his contemporaries. 
Dr. Henry’s early kindled love for science was 
strengthened by lessons so impressively taught, 
in which, reverence for the teacher was inter- 
