VOL. XXXII.] PHILOSOPHICAL TRANSACTIONS. 637 



In the 9th, 12 should have risen to 8; for the ball 3 must have had its force 

 = 16 X 16 X 3 = 768; and if 12 received its whole force it must have risen 

 to 8, because 8 X 8 X 12 = 768. ,/ 



In the second part of the 10th experiment, 12 should have risen to near 

 5, because 12 X 12 X 2 = 288, and 5 X 5 X 12 is but 300. 



In the 11th, the ball 12, 30 times heavier than the little one, must have 

 gone to 2f inches, because the momentum of the little ball being = 1 5 X J 5 

 X 1 = 225, that of the ball 12 must be = 2,75 X 2,75 X 12 = 226 &c. 



It may be here alleged, that one ought to subtract the momentum, with 

 which the great ball comes upon the little one; but that will not mend the 

 matter much, though indeed the difference will be less. For, 

 ' In the 8th experiment, if we subtract 4 X 4 X 12, = I92, from 389,88, 

 there will remain 197,88, and the ball 12 will go but to 4; but then in experi- 

 ment 9, if we subtract the same N° 192 from 768, we shall have 576, which 

 would carry 12 to near 7 degrees, because 7X7X12 = 388. 



In the 10th experiment, there is only 48 to be subtracted; and in the llth 

 only 15; and therefore the velocity of 12 will very much fall short of what is 

 agreeable to the new opinion. 



After the experiments made, and what has been said, till these consequences 

 are overthrown, no notice ought to be taken of any objections, or new expe- 

 riments. But to give the objectors all possible satisfaction, I shall, in another 

 paper, endeavour to show the fallacies of the arguments, and solve the phaeno- 

 mena of the experiments made; showing, both by reason and experiment, that 

 the facts ought to be as they are, in consequence of the received opinion and 

 laws of resistance. 



A Catalogue of 50 Plants lately presented to the R. S, by the Company of 

 apothecaries of London. N° 376, p. 279. 



The Company of Apothecaries of London, having in the year l673, esta- 

 blished a physic-garden, which they afterwards furnished with a great variety of 

 plants, for the improvement of their members in the knowledge of botany ; 

 Sir Hans Sloane, Bart, in order to encourage and promote an undertaking so 

 serviceable to the public, generously granted to the company the inheritance of 

 the said garden, being part of his estate and manor of Chelsea, on condition 

 that it be for ever kept up and maintained by the company as a physic-garden ; 

 and as an evidence of its being so maintained, he directed and obliged the com- 

 pany, in consideration of the said grant, to present yearly for ever to the R. S. 

 at one of their weekly meetings, 50 specimens of plants, that have grown in 



