232 Zircon.— Op/ilkalmla. " 



legist has also found it in Banffshire, crystallized, of a uhite co- 

 lour, and occupying cavities in a granite vein. It has further 

 occurred to him in the gneiss of Sutherland near the eastern ex- 

 tremity of Loch Shin. It is here also of a purple colour, and is 

 Often diffused in such a manner among the other ingredients of 

 tlie rock, as in some measure to form an integrant part of its ge- 

 neral structure : in other instances it is accumulated in lumps 

 among its laminre. 



ZIRCON. 



This mineral has, we understand, been discovered by Dr. Mac- 

 Culloch in Sutherland. It occurs in a compound rock formed of 

 copper-coloured mica, hornblende, and felspar. 



This rock forms one of the occasional beds in the gneiss, and 

 bears a resemblance in its composition to the zircon syenite of 

 the north of Europe ; the crystals are a quarter of an inch in 

 length and well defined, and their colour is an obscure crimson 

 ai)))roaching to that of cinnamon. 



OPHTHALMIA. 



Sir William Adams having had the honour to be nominated by 

 His Majesty's Government to superintend that part of York Ho- 

 spital, Chelsea, wJiich has been appropriated to the reception of 

 the blind pensioners belonging to the army, navy, and artillery, 

 feels it a duty fully to lay open to the profession at large his new 

 modes of treating them. This duty is suggested as well by the 

 peculiar confidence which has been reposed in him, as by the 

 high sanction thus conferred upon his improvements in ophthal- 

 mic surgerv. He therefore freelv'invitcs all medical practitioners 

 and students who are interested in the advancement of this branch 

 of surgerv, to attend his operations at York Hospital, which for 

 their convenience will be performed in future on Tuesdays and 

 Fridays, between the hours of seven and nine in the morning. 



To remove all dou'ot or misconception with regard to Sir Wil- 

 liam Adams's practice, he proposes on each of these days to give 

 a description of the nature of one of the diseases to be ope- 

 rated upon — the general modes of performing the operation — 

 his pecidiar mode — and his reasons for deviating from the usual 

 practice, where such deviation has been found necessary. 



The records kept of each case, from the ])atient'3 admission 

 into the hospital to his final discharge, will be open at the periods 

 already mentioncfi, for the inspection of such gentlemen as at- 

 tend; so that tl'.e profession will be enabled faiily to appreciate 

 the character of I he new as compared with the oul modes of 

 practice. 



It is expected that from Jifleen hundred to two thousand pa- 

 tient^ 



