338 ON FRENCH WEIGHTS. 



ous columns in the tabic, which you gave in your 4to 

 Journal, vol. I, p. 332, for reducing grammes of the new 

 French system of weights into English grains, and vol. II, 

 p. 284, foF reducing English grains into grammes. 

 The Trench The errours here alluded to seem to have originated at p. 



frammeerrone- jqq f y OUr fj rs £ volume, where one gramme is stated to be 

 ously given. J 



22*966 English grains, instead of 15*457, which results 



from multiplying 18-841, the number of French grains, by 

 ♦8204. 

 Corseted in Since the above determination of the gramme, the corn- 



Cyclopaedia, pletion of the meridional measurements has introduced a 

 small correction, which occasions, I suppose, the gramme 

 to be stated at 15*444, in the article Gramme in your new 

 British Cyclopcedia, which is the proper reciprocal of 

 •OG475, stated therein, under the article Weight, as equi- 

 valent to 1 grain troy ; but in your 4to Journal vol. II, 

 p. 284, the whole column is calculated from '04354 instead 

 of the above. 

 Corrections of Permit me here farther to remark on the article Weight, 

 other weights. ; ft the i astp art of the British Cyclopedia just published, that 

 1 pound troy is 288 scruples ; and not 283 ; that 1, scruple 

 is 1*295 grammes and not 1*395; 1 ounce avoirdupois is 

 28*328 grammes, and not 28*32 ; 1 dram is 27*34375 grains, 

 and not 37*975: and 1 dram is also 1-7705 grammes and 

 not 1*81. The English troy pound contains or equals 7021 

 Paris grains nearly, and not 702 ; the English avoirdupoise 

 pound is 8532-5 French grains, and not 8538, according 

 to the table on the opposite page thereto : the first column 

 of which table is inconsistent with (as not a true reciprocal 

 to) the second column ; for 1 French grain is 0*8204 

 English grains, as is rightly stated on the preceding page, 

 and not «8203 ; 10000 French grains are 8204 English 

 grains, and not 8233, as there stated. 



As unfortunately the conclusion of the British Cyclopaedia 

 prevents the errata being there given, I have set them down 

 here, and am, 



SIR, 

 Your obedient humble Servant, 



JOHN FAREY. 



12, Upper Crovn Street, Westminster \ 



l<Uh January 1809. 



VII. 



