342 EXPERIMENTS ON THE RELATION 



gen ; as also, a bulk nearly equal of an defiant gas explosive 

 mixture, without any unpleasant concussion or noise ; so com- 

 pletely does the air-chamber abate the expansive violence, as 

 well as the loudness of the report. Projection of the mercury, 

 or displacement of the gas, is obviously impossible. 



PART 



