422 MEMOIR OF THE LATE DR THOMAS CHARLES HOPE. 
carbonic acid, 1 of calcareous earth, and a little of phosphate of iron and man- 
ganese, which probably gives it colour.” This would lead the unsuspicious 
reader to infer that ScumeEIssEeR had been the discoverer of the new earth, which 
is certainly not the case; but this is only one of the many plagiarisms of this 
writer. The only chemist who has the slightest claim to the merit of an original 
detecter of Strontian earth, besides Dr Horr, is M. KiarrotH; who, in the 
Chemische Annalen for 1793-94, compared Strontianite with Witherite. In his 
first paper, KLAPRoTH conjectured that the two minerals differed in composition, 
because the salts of Strontian colour the flame of combustibles red, while those 
of Barytes do not; and this conclusion was afterwards confirmed by some expe- 
riments of SutzeEr and Brumenspacu. Neither Kiaproru nor Hore seem to 
have been aware of what the other had discovered, and both may therefore be 
considered as original discoverers, but the first full investigation of the subject is 
undoubtedly due to Dr Hope. . 
The success of these investigations, and the popularity of Dr Hopr’s Chemical 
Lectures at Glasgow, suggested to the celebrated Dr Brack, then in declining 
health, the idea of having his promising pupil Dr Horr associated with him, as 
his assistant and successsor in the Chemical Chair. He accordingly made the 
proposal to Dr Hore in 1795, obtained the concurrence of the Patrons, and on 
the 4th of November of that year, the latter body chose Dr Hore in that capacity. 
In that session but a few of the lectures were delivered by Dr Hore: But in the 
session of 1796-97, after Dr Buack had concluded his admirable Lectures on 
Heat (as I find from M.S. notes of a friend who attended that course), the 
venerable Professor introduced Dr Hore to the class in the following terms :— 
“‘ After having, for between 30 and 40 years, believed and taught the chemical 
doctrines of Staut, I have become a convert to the new views of chemical 
action; I subscribe to almost all M. Lavorsrer’s doctrines; and scruple not to 
teach them. But they will be fully explained to you by my colleague and friend 
Dr Horr, who has had the advantage of hearing them from the mouth of their 
ingenious author.” Accordingly, Dr Hore delivered a considerable portion of that 
wintercourse to a large audience; and in the summer of the year 1797, he also 
gave a three months’ course of Chemistry. 
The eminent men who were at that time the ornaments of our University, 
were Professors Monro secundus, BLAcK, GREGORY, Rogpison, DucaLD STEWART, 
and PLayrair—and Hore always remembered with much satisfaction his earlier 
intercourse with Principal Ropertson, ApAmM Smits, and especially with 
Hutton the geologist—a constellation of names that shed a lustre on the society 
of Edinburgh at hat period. 
It would seem that the subject of our memoir still intended to conjoin the 
practice of medicine with his academical duties. For this purpose, he became a 
Fellow of the Royal College of Physicians in November 1796; and, until some 
