14 CHAPTER 27. 
feventh volume of the Philofophical T ran/- 
aBions. This opinion was contefted, and 
drew him into a controverfy with his friend 
and colleaglie. Dr. Whytt. Having con- 
tinued his experiments, and enlarged his 
obfervations, he publiflied, in 1752, his 
Differtation on Quick-Lime and Lime 
V/ater;'* republifhed in 1754, and in 
1757; in which he replies to Dr. Whytt's 
Strictures; and, after enumerating a va- 
riety of difeafes, in which lime water has 
proved efficacious, confirms the opinion of 
his colleague, relating to its lithontriptic 
powers. 
Dr. Alston's Ledlures on the Materia 
Medica were prepared for the prefs before 
his deceafe, and were publiilied under the 
following title : 
Ledtures on the Materia Medica ; cori-^ 
taining the Natural Hiftory of Drugs, 
" their Virtues and Dofes : alfo, Directions 
for the Study of Materia Medica ; and 
an iippendix on the Method of Prefcri^ 
bing, Publi(hed from the Manufcript 
of the late Dr. Charles Alston, Profef- 
for 
8 
