C 785 ] 
All thefe comparifons fhew Greaves’s meafure of 
the London.foot to have been fhorter than Graham’s, 
But they are not all of equal authority. The mea- 
fures of Sneilius depend upon the corredtnefs of three 
feveral feet ; that is to fay, his copy of the iron ftan- 
dard, the Rhynland, and the Paris foot; whereas 
the reft (except Norwood’s) depend only on the 
Paris foot, applied to the fame magnitudes that 
Greaves himfelf had meafured. Norwood’s meafure 
is rather to be wondered at, that, notwithftanding all 
the difficulties he had to encounter, it fhould come 
fo near to the true magnitude of a degree, than to 
be depended on for the exadt meafure of the iron 
ftandard ; and is an inftance of what the diligence 
and fagacity of a private and obfcure man, unaffiffed 
by the public purfe, or the contributions of friends, 
could accomplifh ; whofe labours may, perhaps, be 
forgotten, when the meafures of the French, taken 
under a royal commiffion, fhall be known to the latefl 
pofferity. 
The three more immediate comparifons of Greaves’s 
meafure with the Paris foot, are by the meafures of 
Auzout, Defgodetz, and Hardy, which afford as clear 
a proof as can well be expedted in this matter, that his 
meafure of the iron fiandard was about 2 parts in 1000 
deficient of Graham’s London foot. 
Mr. Greaves found the foot on the monument of 
Statilius to contain 972 fuch parts as his London foot 
contained 1000 ; and that on the monument of Cof- 
fhtius 967 ( 1 ). Thefe meafures reduced to Graham’s 
foot, are 970, and 967. 
(1) G/eavcs, p. 2c8, 209, 
Auzout s 
