British, French, and Dutch Weights. 



G7 



It is said that Dr. Kelly found a copy of a very accurate 

 standard kilogramme, sent over from France to the British 

 Mint, to weigh 15.433 British troy grains, but as I do not pos- 

 sess the Universal Cambist, I take this information at second 

 hand. 



Dr. Weber of Berlin was furnished with a brass standard of 

 the British imperial troy pound, procured by Professor Schu- 

 macher, with one of Mr. Robinson's balances, and with a pla- 

 tinum kilogramme belonging to the Prussian government. He 

 found 1 Ib. British troy, or 5760 grains =373.2484 grammes *: 

 this makes the kilogramme equal to 15432.08222 grains, 

 leaving a difference with Mr. Van Swinden's kilogramme of 

 0.183 grains. It is natural and just to suppose that Dr. 

 Weber paid due regard to .the circumstance, that the platina 

 kilogramme, if equal to the weight of the two platina kilo- 

 grammes kept at Paris, one in the Archives Nationales, and 



* Poggendorff s Annalen der Physik und Chemie, 1830, vol. xviii., No. 4, 

 P. 608. 



F 2 



