On the remarTiahle 'Efficacy of Carrots. 251 



termincd by the vibrations. Hence it is evident that this 

 cause is the true one; and according to the heautitiil re- 

 mark of M. La Place, there is an absolute necessity to pay 

 attention to it in the malhemalical theory of the propaga- 

 tion of sound, ahhougb it cannot be verified by uieanS of 

 the thermometer, as it is an instrument not to be affected 

 by successive and moraenlary variations of heat, similar 

 to the l)aron)eter, which does not show the instantaneous 

 changes of the clastic force, the cause of sound, and yet 

 the reality of those changes is acknowledged by the viholc 

 world. 



XL. Observations on the remarkable Efficacy of Carrots, 

 under a 7ieiv Mode of application, in t lie Cure of Ulcers 

 and Sores. By Mr. Eichakd Walker *, 



J- HE carrot poultice is an application which has been long 

 in use to correct the disposition and improve the discharge 

 of the putrid or scorbutic ulcer. 



The inanncr in which it is usually applied, is by grating, 

 or scraping the carrots fine, and laying them on raw. 



I .have lately had reason to believe, that the effects of it 

 rriay be considerably increased, by varying the mode of ap- 

 plication. 



Several cases occurred in the Radcliffe infirmary, during 

 the summer and beginning of the winter last year, of the 

 true, malignant, scorbutic ulcer. 



All the common methods of treatment were adopted, and 

 of course the carrot poultice was not omitted. 



'Jlie inefficacy of it however was too evident. 



In consequence therefore of the ill success attending this 

 practice, several of the cases terminating fatally, and as 

 fresh instances were continually occurring, the following 

 change was at length tried, in the use of this remedy. 



The carrots being previously cleaned by scraping and 

 washing, were split and boiled till quite tender, in a small 

 quantity of water ; the liquor was then strained, or poured 

 off, and the carrots beaten in a mortar, to the consistence 

 of an uniform soft moist pulp. 



The ulcers were first washed clean with tlic liquor rather 

 warm, in which the carrots had been boiled, sonjetimes 

 fomented with it, and the carrot poultice being previously 

 spread ready, that the sore might be as little exposed to the 

 ^:r as possible, applied cold. 



This was repeated night and moining, and oftener when 



* Comnitnicatcd by tlie Author. 



the 



