TO CORRESPONDENTS, g3g 



TO CORRESPONDENTS. 



Philochemicus does not seem to be aware, that the ob- 

 ject of the galvanic troughs he mentions was to get rid of 

 the cement, all the disadvantages of which vecur in the 

 plan he proposes. Any danger to be apprehended front 

 the use of earthenware or glass may readily be obviated by 

 the simple and cheap defence of a case of common wooc^. 



With regard to the use of the word particle, when he de- 

 fines it, in one place, the smallest portion of any com* 

 pound substance into which it can be resolved without 

 decomposition; and, in another, the smallest portion of any 

 compound body, which we can procure by mechanical 

 means ; these two definitions are obviously not consistent 

 with philosophical precision. The fact appears to be, 

 that the word particle, or small part, a word with a cer* 

 tain laxity of signification in common use, cannot well 

 therefore be confined to one precise and definite meaning 

 on all occasions; but like many other terms, will have its 

 exact sense to be determined in general by the context. 



L. O. C.'s paper will be inserted the earliest opportunity. 



As a request formerly made appears not to have been 

 seen, or to have been overlooked, by some of ray more 

 recent correspondents, I beg leave to repeat it. It is, that 

 they would leave in their manuscript a margin for the in- 

 sertion of the side notes. It is also desirable, that, when 

 a paper requires drawings for its illustration, none of it 

 should be written on the back of the drawings. 



METEOROLOGICAL 



