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OBSERVATIONS on GUN-POWDER. By the 

 Honourable GEORGE NAPIER, M.R.I.A. Communicated 

 by the Earl of CHARLEMONT, P.R.I.A. 



February i, 1788. 

 My Lord, 



X N compliance with your requeft, I fend you the following Read Oft. 

 obfervations on gun-powder, deduced from a feries of experi- ^5>'7 • 

 ments, in the condudling of which I was ably affifted when 

 fuperintcnding the Royal Laboratory at Woolwich. 



As I do not mean to fatigue your lordfhip's attention by an 

 elaborate pyrotechnical effay, I fhall confine myfclf to fuch fads 

 as appeared new or interefting in the courfe of my inveftigation j 

 only introducing thofe parts of the common procefs which may 

 lend to elucidate an experiment, or ferve to eftablifh the expe-- 

 dicncy of an alteration ! To eifed this with feme degree of accu- 

 racy, I fhall arrange my remarks under the following heads : 



O FiRSt. 



