StTyZseye JBtciTc^ynctn', 
Dct viti' JS.ZvzsoTv, 
(xeo yq/e R. CfxZhcn rt'. 
ZJZ.B laJcem^rt'. 
Iyison,'Blak6man & Company, ^ab Ushers, 
753 & 755 JBwadway, TfewTork. 
SOth June., 75S ^ B 
Prof. Sereno Watson, 
Cambridge, Mass. 
Dear Sir: 
We have received your favor in regard to corrections of the 
School and Field Book, and also the copy of this book, marked. 
The book was originally set up at the University Press in Cam- 
bridge, and the corrections will have to be made there. 
On looking over the copy of the book returned to us, we find 
several cases where you have omitted to correct the citations to 
agree with the nev/ edition of the "Lessons." We have turned 
down the corners of the pages and marked with pencil opposite 
these cases; and we send the book to you by mail to-day with the 
request that you will make the proper change in these places, and 
then send the book to Messrs. John Wilson & Son at the University 
Press, to whom we vn*ite also to-day, informing them that the mem- 
orandum of corrections will be sent them by you. 
We have your favor of recent date in regard to the changes 
demanded by teachers in the Field, Forest and Garden Botany, and 
we will communicate at once with leading teachers who are using 
that book, for suggestions with reference to its revision. We 
have thought that possibly the Revised Manual might be widely, if 
not generally used, in the grade of schools where the Field, For- 
