324 MifieUanea Curiofa. 



Subject, Intituled, L 'Art dejctter les Bombes % been 

 Pubiifhed by Moufieur Blonde!, wherein he gives 

 the Solutions of this Problem by Mcffieurs Bitot, 

 Burner and dc la Hire : But none of them being 

 the fame with Mine, or, in my Opinion, more 

 eafy, and ^molr. of them more Operofe, and be- 

 fides mine finding the Tangent, which generally 

 determines the Angle better than its Sine, I thought 

 my fe f obliged to Print it for the ufeof all fuch, 

 as deiire to be informed in the Mathematical part 

 of the Art of Gunnery. 



Now theie Rules were rigidly true, were k 

 nor, as 1 (aid before, for the Oppofition of the 

 Medium, whereby not only the direcl; imprefl: 

 Motion is continually retarded, but likewife the 

 incieafe of the Velocity of the Fall, fo that the 

 Spaces defcribed thereby, are not exa&ly as the 

 Squares of the Times : But what this Oppofition 

 of the Air is, againfl: feveral Velocities, Bulk.*, 

 and vVeights. is not fo eafie to determine. 5 Tis 

 certain that the weight of Air to that of Water, 

 is nearly as 1 to 800, whence the weight thereof, 

 to that of any Prcjctt is given 5 'tis very likely, 

 that to the fame Velocity and Magnitude^ but of 

 different Matter, the Oppofition {hould be recipro- 

 cally as the weights of the Shot ; as likewife that 

 to Shot of the lame Velocity and Matter, but of 

 different Si^es, it (hould be as the Diameters reci- 

 procally .- Whence generally the Oppofition to Shot 

 with the fame Velocity, but of differing Diameters, 

 and Materials, {hould be as their Specific^ Gra- 

 vities into their Diameters reciprocally j but whe- 

 ther the Oppofition, to differing Velocities of the 

 fame Shot, be as the Squares of thofe Velocities^ 

 or as the Velocities themfelves, or otherwife, is 

 yet a harder Queftion. However it be, 'tis cer- 



tain, 



