98 



been enabled to determine by this means some cases of supposed 

 amaurosis to be in fact cataract, and has treated them successfully 

 by operation. 



Dr. Mackenzie, an eminent ophthalmologist of Glasgow, has also 

 employed this means to determine the condition of the eye in glau- 

 coma. Dr. Hays remarked that he had resorted to the catoptric 

 examination of the eye in many cases, and believed that it would 

 prove as valuable a means of diagnosis in some of the diseases of the 

 eye, as auscultation is in those of the chest. 



Dr. Hays exhibited and explained several models, designed and 

 constructed by Dr. John Neill, resident surgeon at Wills' Hospital, 

 for the purpose of illustrating the catoptric phenomena just explained. 



Dr. Patterson communicated verbally a method of using 

 thin sheets of lead by the blind, in writing, reading, and 

 musical notation, invented by Mr. Joseph Saxton. The sheets 

 of lead are three thousandths of an inch in thickness. Dr. 

 Patterson presented specimens of the writing and musical 

 notation. 



Dr. Bache communicated the decease of Mr. George 

 Pollok, a member of the Society, who died in April last. 



Stated Meetings May 17. 



Present, twenty members. 



Mr. Du Ponceau, President, in the Chair. 



Letters were received from Mr. Thomas Townsend, and 

 Mr. G. Riboni, and referred to committees. 



The following donations were received : — 



FOR THE LIBRARY. 



Proceedings of the Committee of Agriculture and Commerce of the 

 Royal Asiatic Society, from April, 1837, to November, 1838, 

 London, 1837-38.— From the Society. 



