MEMOIR OF THE LATE DR. HENRY. 107 
woven with intense delight in the subject matter 
of his instructions, and, especially, with a glow- 
ing admiration of that successful inductive pro- 
cess, which had guided to the discovery of La- 
tent Caloric. Dr. Henry was no less fortunate in 
his other instructors, both in general and pro- 
fessional knowledge. The important chair of 
Practical Medicine was then filled by Dr. Gre- 
gory, whose marked originality of thought and 
humour, and whose happy talent of arresting 
attention by illustrative cases, narrated with 
dramatic effect, threw around the descriptions of 
disease a fascinating interest, to which they would 
seem naturally most alien. On Dr. Henry’s second 
visit in 1805 to the University, he found the chair 
of Physical Science adorned by the profound 
mathematical learning of Playfair, and that of 
Moral Philosophy occupied by Stewart, whose 
pre-eminence as a teacher has been beautifully 
celebrated by the most competent judge of 
modern times.* Of the invaluable instructions 
of Mr. Stewart, Dr. Henry was prevented from 
availing himself by the necessity of following at 
the same hour some professional lectures; but 
he has confessed that he not unfrequently de- 
serted the Clinical Theatre for the impressive 
*Sir James Mackintosh, Preliminary Dissertation, p. 386. 
