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XXXVIII. — Continuation of an Account of 

 some Experiments 'performed with an Appa- 

 ratus for Discharging Ordnance, without the 

 Use of a Light or Match-lock ; in which se- 

 veral Inferences are drawn with regard to the 

 Nature and Source of the Flame, 



By John Deuchar, M. W. S., P. A. It. P. S. ; 

 Lecturer on Chemistry in Edinburgh, 



(Read 10th February 1821. ) 



I have now to lay before the Society, a continua- 

 tion of the account of my experiments with Colo- 

 nel Yule's apparatus for discharging ordnance. 



Since last hazarding a few observations on this 

 curious subject, I have not been able to allot to it 

 that time which the investigation deserves ; yet 

 still the facts at which I have arrived, may proba- 

 bly justify the consumption of the Society's time for 

 a little longer. From these facts 1 have endeavour- 

 ed to draw several conclusions with regard to the 



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