IV PREFACE. 



it receives from the public, I have obtained the co- 

 operation of Mr. Richard Taylor, a gentleman 

 from whose exertions, in conjunction vv^ith my own, 

 — and none I am sure will be wanting, — I may, with- 

 out presumption, hope that The Philosophical 

 Magazine and Journal will increase in interest and 

 general utility. 



ALEX. TILLOCH. 



London, July 31, ISSiJ. 



(fj* Communications for the Philosophical Magazine and Journal 

 are requested to be addressed in future to the Editors, care of 

 R. and A. TAyi,OR, Shoe-Lane. 



