TO CORRESPONDENTS. 



We hope to insert the Communication on the Measurement of the 

 Hills of Swaledale, Yorkshire, in our next. 



The "Lines to Caleb Mainspring" have been received. We do not 

 recollect that we have ever before been favoured with a poetical commu- 

 nication ; and must therefore obtain the opinion of some who are more 

 familiar with the Muses. As Prize Chronometers and Trial Numbers 

 are, we believe, themes which have not before been sung, (though we are 

 aware there are musical clocks,) we give the following sample of our 

 Correspondent's numbers. 



" Variety is pleasing — but a pest 

 The same dull rate of sameness; — so to find 

 Six * eighty right is wrong. — Caleb, you jest. 

 I've added up your ratiocination, 

 And find the product to be botheration.' 



* 6"'80, the mean monthly rate of Caleb's Common Watch. 



%* The Editors request that all Communications intcndedjbr immediate 

 insertion may he sent to the care of Mr. Richard Taylor, Printing Office, 

 Red Lion Court, Fleet Street, London, at furthest by the \5ih day of the 

 month, or they will be too late to appear in the ensuing Number. 



TRANSACTIONS OF THE GEOLOGICAL SOCIETY OF 

 LONDON. 



1'^ilE SUPPLEMENT, completing the Second Volume, and The 

 • First Pakt of The Third Volume, Second Series, are this day pub- 

 lished. 



Price of the Supplement 35. 6d.; to the Fellows, 3s. First Part of 

 Vol. III. (illustrated with Thirty-one Plates) 2l. ; to the Fellows, 1/. 12s. 

 To be had at the Apartments of the Geological Society, •Somer.«:et- 

 Ilouse. and of all the Booksellers. 



