544 THE CENTURY, 



vent in the end must be no bigger than a pinhole.&quot; 

 &quot; Heat the same well in the fire, and then put it into a 

 vessel of cold water, and it will suck some of the water 

 into it, you may heat the same so often, till by the 

 peize (poise ?) thereof you may be assured that it is 

 more than half full. Then set this ball on a few 

 glowing coals, and you shall find the same to give a very 

 strong blast. ... I make no question but that the same 

 may be made so large as that they will blow one whole 

 hour together without any intermission.&quot; Page 25. 



In the second edition of Dr. French s &quot; Art of Destil- 

 lation,&quot; 1653, page 150, he describes the &quot;Philosophi- 

 call Bellowes :&quot; one is to blow a furnace fire ; another a 

 candle, serving as a blow-pipe ; and the third for a 

 common fire. He notes &quot; that these kind of vessels 

 must be made of copper, and be exceedingly well 

 closed, that they may have no vent but at their noses.&quot; 

 He recommends, in preparing them for use, that &quot; you 

 must first heat them very hot, then put the noses there 

 of (which must have a very small hole in them, no 

 bigger than a pin s head may go in) into a vessel of 

 cold water, and they will presently suck in the water, 

 of which being then full turne the noses thereof 

 towards the candle or fire which you would have 

 blown.&quot; 



The third figure, instead of being a copper ball is 

 formed like the human face, and is held by a long 

 stick or handle attached to the back. It is represented 

 and described by Schwenteri, in his u Delicia3 Physico- 

 Mathematicge,&quot; 1638, along with two tubulated balls for 

 similar use. 



Such then were the suggestions the Marquis had before 

 him to excite his experimental inquiries, independent of 

 other sources. But whatever he may have known on the 

 subject of these applications of steam, however much 



