316 New Patents. [Oct. 



an analysis by Klaproth of what he called the gonggong. 

 (Geklen's Journal, Second Series, vol. ix. p. 408.) From the 

 account which he gives of this instrument, and the result of his 

 analysis, there can be no doubt that it was the same as that of 

 which I gave an account in the last Number of the Annals of 

 Philosophy. Klaproth found the specific gravity of the gong 

 which he examined 8*815. It was not so heavy as my speci- 

 men, the reason of which probably was that it contained more 

 tin ; for he found it composed of 



Copper 78 



Tin 22 



100 



IX. Extract nf a Letter from Dr. IVollaston. 



The following letter was received too late for insertion in our 

 last Number: — 



DEAR SIR, August 24, 1813. 



In the continuation which you have promised of the experi- 

 ments of Messrs. Delaroche and Berard I hope you will cor- 

 rect a mistake they are under concerning the invention of the 

 gazometer they employ. 



I believe that the contrivance which you see ascribed to me 

 (p. 91, of the Ann. de Chimie) was invented at Paris by Messrs. 

 Girard as a means of giving uniform pressure in a hydrostatic 

 lamp, that was brought into this country about two years since. 



Believe me ever truly yours, 



W. H. VVOLLASTON. 



Article XV. 



List of Patents. 



Charlks Wilks, of Ballincollig, Cork; for certain im- 

 provements in the naves of wheels for carriages, and for centres 

 of wheels for carriages, and for centres for wheels of machinery 

 for various purposes. Dated June 29, 1813. 



James Penny, Low Nuthwaite, Lancaster, and Joseph 

 Kendae, Cockershell, Lancaster; for an improved principle or 

 plan for making pill and other small boxes. Dated June 29, 

 1815. 



John Curr, Sheffield ; for methods of applying flat ropes to 

 horse-gins, and perpendicular drum shafts of steam engines, for 

 drawing coals, minerals, or water, out of mines, whereby the 

 horses'' labour is greatly diminished, and flat ropes working on 



