27G THEORY OF THE MOTION OF ROCKETS. 



IV. 



On the Motion of Rockets both in Nonresisting and Resisting 

 Mediums, By W. Moore, Esq. ; comnmnicated by the 



Author. 



SIR, 



To Mr. NICHOLSON. 



oHOULD the following Essay on the Motion &c. of 

 Rockets be considered sufficiently interesting for your 

 valuable and well conducted Journal, you are at liberty to 

 make use of it. 



I ana. Sir, 



Yours very respectfully, 



W. MOORE. 

 Royal Military Academy, Woolwich, 

 Novembers, 1810. 



Tlie theory of '^^^ theory of rockets is a subject, which has never yet 



rockets not engaged the attention of mathematicians ; a circumstance 



maihemaTi- ^ ^^^ich perhaps is partly to be ascribed to their not having 



cians. been used until very recently as implements of warfare. 



The practice however of throvving them into besieged places, 



to cause their surrender, is now nearly universal among the 



English, and indeed is almost confined lo them. 



Their military '^^*^ invention of the military rockets* (as they are now 



wae. called) as it regr.rds the exemption of our troops from the 



enemy's power of annoyance, is to be esteemed as valuable. 



By the help of these machines the capital of Denmark and 



the well fortified town of Flushing, together with much of 



the French navy have within a few years been taken and 



destroyed with scarcely the loss of a single mau : on which 



account, it is a matter of no small moment to bring the 



rules lor discharging them and the methods of estimating 



their effects under various circumstances into one general 



* 'I'be inverition of the militarv rocket is exclusively clue to William 

 (.kingreve, Esq.; a gentleman well known and esteemed by the public 

 fav his i;ig nuity. 



and 



