44 Appearance exhibited by Hoar Frost. 



same appearance ; but that I had never observed it before, and 

 have never seen it since the winter of 1818, when this note was 

 made. 



The sketch only pretends to represent the general effect of this 

 appearance to the eye. To have given the true position of the 

 crystallization with respect to the sides of the bars, would 

 have required a more highly finished engraving than was here 

 admissible. A section of a bar is added for that purpose. All 

 those intricate appearances, which it was thought unnecessary to 

 represent, may easily be understood from the -description. 



Art. VII. A Letter from A. Copland Hutchison, Esq., 

 to Sir Everard Home, Bart., containing an Account of a 

 successful Case of the High Operation for the Stone. 



[Communicated by Sir Everard Home, Bart.] 



Bear Sir, 8^ August, 1825. 



As your two successful cases of the high operation for the stone, 

 published in the third vol. of Strictures, have encouraged me to 

 adopt that mode of operating ; and finding, also, that you have 

 since that time operated in the same manner twice at St. George's 

 Hospital ; these being the only cases, I believe, that have occurred 

 in England since the days of Cheselden*, I am induced to send 

 you an account of the following case and operation, with full per- 

 mission to make any use of it you may think proper. 



* In one case upon a man 54 years of age, October 29th, 1824, in which the 

 stone was'extracted entire, weighing about 3| ounces, though its texture was so 

 loose beneath the external crust, that it afterwards broke to pieces in the 

 hands of a gentleman who was examining its surface. In this case the patient 

 died on the third day after the operation ; but upon examination after death, 

 the operation, in itself, was not the cause, the bladder having suffered so 

 much by disease from the presence of the calculus, as not to admit of his 

 recovery. 



The other case was a boy eleven years of age ; the operation was performed 

 on the 3rd December, 1824, and the patient got well, though the wound, from 

 his bad state of health, did not completely heal for two months. From his 



