CojjL Parlby's Rifle Rockels. 75 



muriatic acid, muriate of barytes was added till it ceased to 

 yield a precipitate ; the quantity of sulphate of barytes show- 

 ing that no other sulphate existed in the water. 



Table of the Results reduced to centesimal Proportions. 



Silliman's Journal, vol. vii. p. 344. 



CAPT. PARLEY S RIFLE ROCKETS. 



To those interested or curious in the important matter of 

 yesterday's (Dec. 13, 1823) exhibition at Dum-Dum, where 

 the first practical experiment of Capt. Parlby's rifle rocket 

 was undertaken by express desire of authority, the result must 

 be most gratifying. The display took place in presence of 

 General Hardwick, Commandant of the Bengal Artillery, 

 who is now on the eve of embarking for Europe, of Colonel 

 Casement, and many civilians and officers, who could not fail 

 to experience a pleasing and proud satisfaction at the com- 

 plete success of an experiment of which the ingenious and 

 scientific individual has himself just cause for exultation, and 

 his masters good reason to be gratified. The short notice, only 

 a few days since, on which Capt. Parlby had to prepare, 

 speaks much for the activity and ready resources of the depart- 

 ment, which is directed under his sole management. 



The range of the rockets from their respective distances of 

 600, 800, 1000, and 1760 yards, was in general most beauti- 

 ful ; and, in the ultimate result, establishes unquestionably 

 the superiority of Capt. Parlby's rifle rocket. A very small 

 portion of them exploded, from causes attributable, we under- 

 stand, to the great haste in which at so short a notice they 

 were necesiariTy prepared: A few were fired from a tube 

 K 2 plated 



