TO OUR READERS AND CORRESPONDENTS. 



The drawings, illustrating the construction of a Blow-pipe, are not 

 sufficiently accurate to enable us to publish them. Our Correspondent 

 •will observe that we have noticed another part of his letter. 



We regret that we are unable to offer our Correspondent, upon the 

 subject of Gas Works, any precise information. There can be no doubt 

 tliat an atmosphere tainted by coal gas is injurious to animal and vege- 

 table life, but much will depend upon the extent of the contamination, 

 and other causes, of which our hmits prevent mention. To say nothing 

 of danger from fire and from explosion, it has always been matter of 

 surprise to us that gas-works are tolerated by the government in close 

 and confined situations — that the Thames is suffered still to be polluted 

 with their offal, and that they are sometimes placed close by the road 

 side, (as at Brentford,) to the nuisance of every one who passes. These 

 matters want looking into. 



Q. will find an answer to his question, in the *• Gazette of Health" for 

 last July. 



F. R. S. must remain unanswered till after St. Andrew's Day. 



Dr. Heinecken's paper is disposed of as he desired. 



