16 A Decimal Scale of Money proposed. 



Having determined the direction of the lines without varia-" 

 tion, it is necessary to fix the other hmits of the phaenomena, 

 that is, to trace the series of places where the variation is 

 greatest. In this we find lines quite as irregular, which inter- 

 pose themselves hetween the former. The greatest of all the 

 variations that have heen observed in the southern hemisphere^ 

 was by Captain Cook in latitude GO" 49', and in 93° 45' of west 

 longitude, reckoned from the meridian of Paris; it was 43" 45'^ 

 The greatest of all those that have been observed in the northerr* 

 hemisphere was also by Captain Cook, in 70=' 19' of latitude, and 

 161° 1' of east longitude ; it was SG'' 19' east. 

 [To be continued.] 



II. Eemark'! and Suggestions, for improving the British Coin, 

 and the keeping of Monejj Accounts, preparatory to the entire 

 Introduction of Decimal Money. By Mr. John Farey 



Sen. 



To Mr. Tilloch. 



Sir, — JL HJi great importance of simplifying our Coinsj and 

 money transactions and Accounts, by assimilating all of these 

 with the decimal notation of our arithmetic, will I trust plead 

 my excuse, for transcribing and sending for insertion in your 

 work, two Letters and a Paper of suggestions, which, during the 

 parliamentary di.scussions last summer, as to anew coinage, I ad- 

 dressed to a member of His Majesty's Privy Council, to whom 

 science and the useful arts, are under no ordinary obligations. 



I have nothing further to add, except to inform the purchasers 

 of the two former volumes of my Derbyshire Report, herein re- 

 ferred to, that I am utterly unacquainted with the reasons which, 

 since June last, have delayed the apjjointment of a Publisher and 

 the sale of the 3d and concluding volume, and unable to say, 

 when they may complete their sets of the work, of 

 feir, 



Your obedient humble servant, 



Howland-strcet, Jan. 1, 1817. JoHN FarHY Sen. 



" S7, Tlowland-strcct, Fitziov-«qiinre, June 14, 1816. 

 " Sir, — The subject of our national Money appears to me a 

 matter of such very great importance, Xlisit although at this time 



tlic fifiure. Now tliis will always be the case when the number of divisions 

 of tlic circle is even ; but it will be otiierwise when the Dumber of them is 

 udil. It is tlierefore cxtrLin«ly probable, tiiat there are on the snrface of 

 the earth an even number of lines of no variation, as Humboldt has re- 

 marked. 



eSceedinglv 



