CORRESPONDENCE, 18,16-40. 151 



not destroy the power of reflecting upon the basis of mathe- 1845. 

 matical knowledge, or physical. Strongly objecting, as I do, 

 to that system in many points, I should admit the Cambridge 

 Transactions as a decisive fact against me if there were more of 

 it, so that the contents could be cited as a proof of the general 

 consequences of the system. 



You should not forget the Cambridge * Mathematical Journal.' 

 It is done by the younger men. Four octavo vols. are published. 

 It is full of very original communications. It is, as is natural 

 in the doings of young mathematicians, very full of symbols. 

 The late Dr. F. Gregory, whom you must notice most honour- 

 ably I send you a mem. of him, which please to return gave 

 his extensions of the Calculus of Operations what used to be 

 the separation of the symbols of operation and (quantity) in it. 

 He was the first editor. He was the most rising man among 

 the juniors. 



Yours very truly, 



A. DE MORGAN. 



To the Master of Trinity. 



7 Camden Street, June 9, 1845. 



MY DEAR SIR, I am much obliged to you for the misprint 

 and the supposed misprint. 1 



' Nineteenth century ' is a bad misprint ; and I ought to have 

 detected it by the absence of the words * march of intellect ' in 

 the immediate neighbourhood, for how can the first phrase come 

 in without the -second ? 



As to the second, I may say with Fouchy, * C'est pire qu'une 

 crime, c'est une faute.' For it was Rheticus who published it, 

 the work being Copernicus's. But I have phrased it as if 

 Bheticus wrote a work of his own with the title cited, whereas I 

 meant to say that he had published one of Copernicus's, who 

 was like Newton, and wanted a kind of half -godfather, half-mid- 

 wife, for all he published. 



There is another misprint which vexed me more, because context 

 will not help. It is the old accusative decenniom for decennmm 

 in the title of the canon. This was the printer's doing, after 

 revise returned, I fully believe, for I know that I read the title 

 most carefully. 



1 I have not found these misprints. I suppose them to be in one 

 of his Cambridge tracts. ED. 



