Proceedings of the Roijal Society of Edinburgh. 425 
FeK 19. — -i)r Andrew Duncan junior^ read a paper On 
Nosdgraphic Lines for exhibiting to the eye the progress of cer-^ 
tain symptoms of disease. 
A paper by Hugh Murray, Esq. was read. On the Encroach^ 
mentqfthe Sea on the shores of the Frith of Forth, 
At the same meeting, Dr Kennedy read a Notice respecU 
ifig the working and polishing of Granite m India^ which is 
published in this Number, p, 349. 
March 5 , — Colonel Straton read the remainder of his paper 
On the Temples of Egypt. 
A letter from Major Hennell to Dr Brewster was read, On 
ihe Current of the LaguUus, 
A paper by Dr Brewster w^s read, O 71 the Mineralogical 
Structure of Apophyllite^ as detected by the microscope^ 
At the same meeting there was laid before the Society draw.r 
ings and a description of a twenty-five feet Reflecting Tele- 
scope, constructed by Mr John Bamage, Aberdeen. 
This magnificent telescope, which does honour to Scotland, 
as well as to its ingenious author, is the largest reflecting tele- 
scope, we believe, that was ever constructed, excepting those pf 
the celebrated Sir W* Herschel. The specplum is 25 feet focal 
length, and 15 inches in diameter. The method of observing 
is by the front view ; the power is from 50 to 1500 ; and the 
mechanism by which the observer and the instrument are 
moved, is so simple and well contrived, that it can be iqcianaged 
and directed to any part of the heavens as readily as a three 
feet achromatic telescope. 
The following gentlemen were elected member s of the So^ 
ciety : 
Foreign. 
V J. G. Oersted, Secretary to the Royal Society of Copenhagen. 
Ordinary. 
The liight Honourable the Earl of Hopetoun. Edward Earl, Esq. Chairman of 
John tt. Wishart, Esq. President of the the Board of Customs, 
Royal College of Surgeons. John Cay, Esq. advocate, 
John Lizars, Esq. 
