3Tg NEW APPLE. 



suppose water to exist in ammonia, or to adopt " the hypo- 



tl^esis of unknown quantities of water in passes." 



With great respijct, 1 am, sir, 



Your humble servant, 



JOHN DAVY. 

 Edinburgh, Feb. 25, 1812. 



XIII. 



On the Compensation Pendulums of Lieut, Kateb and Mr, 

 Reid. In a Letter from a Correspondent* 



To W. NICHOLSON, Esq. 

 SIR, 



jpcCiiuium. 



JLn your 



Compensation Jj^^ your tast number 1 observed the description of a com» 



pensation pendulum by Mr. Adam Reid. But this pen-- 

 dnlum I conceive to be precisely the same in principle vvith 

 that invented by Lieutenant Henry Kater, and described 

 in vol. XX, p. 214, of your Journal. The only difference 

 appears to be, that Mr. Reid has used a rod of steel instead 

 of wood, and that his pendulum has no means of adjusting 

 the compensation. It is far from my intention to infer, that 

 •Mr. Reid borrowed the idea, but I trouble you with these 

 remarks in justice to the original inventor, 

 I am. Sir, 

 Yours with much esteem, 



A CORRESPONDENT. 



XIV. 



A short Account of a new Apple, called the Downton Pip" 

 pin, in a Letter from Thomas Andrew Knight, Esq^. 

 E. li. S. 4-c. to the Secretary*, 



DEAR SIR, 



^'ew variety A Sent last autumn a couple of dozens of a new apple, the 

 oi' the pippin. £)pwnton pippin, for the inspection of the Horticultural 



• Trans, Hort. Soc, vol |I, p. 251. 



Society, 



\ 



