ivith ihe Standard of the Engli/h Mcafures. 23? 



•C. Prony, to whom thefe refearclies were parlicu'larly intcrcft- 

 ing, as it is to him we are iaclLbted for a French tranllation 

 of general Roy's memoir on the iirfl trigonometrical Tnealure- 

 ments made in Eno-laiul, uoted down the rel'ults ; and it was 

 in the cabiiaet of that learned aiian, and by the affilinncc of 

 a comparative apparatus belonsino; to him, that the priuci^l 

 operations were made. He was lb kind as to tranfmit to us an 

 aiitlventic copy of the report given iu to the luUitute 5 a pro- 

 duction thouahtto befo,<:;eneraIly jutereding, as to be read in 

 the public fitting of ihc^Jaft q,uarler. He adds, " that this 

 report will be foon followed bv a memoir, iu which he will 

 give more circumftantial dotails rcfpecling the obfervatiaiirS 

 he made ; tofreihcr with a defcription and drawing of his 

 cf)mparative apparatus." In the mean time we ih&W lay 

 before our readers the report, afliuing them that we hax«e 

 taken every poHible care, iu reviling the proc/s, to avgid ty- 

 pographical errors. 



NATIONAL INSTITtTTE. 



Jjx/raSI from the Rcg'iflers of the Clafs ; Hitting of the 

 6th Nivofe, Year 10 [Dec. 27, 1801.)" 



A member, in name of a commiffion, read the following 

 report on a com))arifo!i of the (liindard metre of the Inltitute 

 with the Etigliih foot : 



" C. I'iclet, prtjfellbr of philofophv at Geneva, fubmilted 

 to the clafs, iu tlie month of N'endemiaire laft, an interelling 

 collection of objects relating to the fciences and the arts, 

 which he procured during his tr;ivels in England. 



" Among thefe objects was a ilandard of tlic EngUfli mea;- 

 fures on a brafs ruler, ftrona and well polifbed, about 49 

 Englidi inches in length, 36 of which make the Englifh yard, 

 and divided along its wliole length, by lines exceedingly fine, 

 into tenths of an inch. 



" This (iandard wascondvufted, at the rcqueff of C. Piftet, 

 by Troughton, an artift of London, who has the well-earned 

 reputation of dividing inflruments with grcatv accuracy : it 

 was contpared at I^ondon witli another (tandard made bv the 

 iaiiie arti(t for Sir (ieorge Schuckburgh, and it was found 

 that the did'crence between thefe two llaudards was no more 

 than tiie diHercnce between each of the divifions, that is to 

 fay, tjuantities ablonilely infeniible. 



" The ft.indard of C. Pirtet, then, ought to be confidcred 

 as identical with that of Sir George Schuckburgii : a detail 

 of the experiminils which alcertain the exactnels of tiic latter, 

 may be fctn in the Philofophical Tranfat-lions for 179^. 



" C Pidtcl had laid before the laltitute, together with 

 P 4 the 



