296 Remarks on Professor Wallace's reply to B. 
calls the attention of the American reader to more impor- 
tant works, particularly to the third volume of La Croix’s 
Calcul Différentiel et Intégral, 2d edition, to which he says, 
“| would refer for general information on these subjects, 
and not to the Complement des Elémens d’Algébre, however 
useful as a school book.” Now upon looking over this vol- 
me of the Calcul Différentiel, and several other works 
being Commentarti Academie Scientiarum Imperialis Petro- 
politane, sometimes in familiar discourse and writing called 
the ancient memoirs or commentaries, to distinguish them 
rom the new series of the same work. The same peculiar- 
ity of quotation occurs in page 301, vol. I. of Le Gendre’s 
Exercices de Calcul Intégral, where, in speaking of this last 
volume, he uses the familiar reference of*Tom., V. des anciets 
mémoires de Pétersbourg,” which is literally copied in French, 
by Professor Wallace. Le Gendre also refers to the article 
28 
of vol. XVI. and to the page 44 of vel. V., instead of 
using in both places the page or the arficle. This reference 
