CENTURY VIII. 417 



dissolve the iron in the aqua fortis, and weigh the 

 dissolution ; and you shall find it to bear as good 

 weight as the bodies did severally : notwithstanding 

 a good deal of waste by a thick vapour that issu- 

 eth during the working ; which sheweth that the 

 opening of a body doth increase the weight. This 

 was tried once or twice, but I know not whether 

 there were any error in the trial. 



Experiment solitary touching the super-natation of 

 bodies. 



790. Take of aqua fortis two ounces, of quick 

 silver two drams, for that charge the aqua fortis will 

 bear, the dissolution will not bear a flint as big as a 

 nutmeg ; yet, no doubt, the encreasing of the weight 

 of water will encrease its power of bearing ; as we 

 see brine, when it is salt enough, will bear an egg. 

 And I remember well a physician, that used to give 

 some mineral baths for the gout, c. and the body, 

 when it was put into the bath, could not get down so 

 easily as in ordinary water. But it seemeth the 

 weight of the quicksilver more than the weight of 

 a stone, doth not compense the weight of a stone 

 more than the weight of the aqua fortis. 



Experiment solitary touching the flying of unequal 

 bodies in the air. 



791. Let there be a body of unequal weight, as 

 of wood and lead, or bone and lead, if you throw it 

 from you with the light end forward, it will turn, 

 and the weightier end will recover to be forwards ; 



