Harvard University, 
Cambridge, Mass. 
My Dear Sir,- 
The proposed ravisicn of Dr.Sray's Manual 
in which revision you 
ars to taka an important part - is to bs conducted in the following manner, by 
agreement v?ith ail concerned in the revision. 
1. The field of the Manual is to be extended westward to the 100th meridian, 
without changing its present southern boundary , 
2, The nomenclature and the descriptions of range are to be revised, and the new 
species are to be added; but the present form and style of the Manual are to be 
preserved. 
3. Ine revision Is to be finished by January 1st, 1889, wl th such accuracy and coro- 
pleteness as can be attained within that iimit of time. 
4. ine first revised copy is to.be prepared by Professor John M .Goui ter, wi th ths 
probable exception of the compos 1 tae, wi 1 1 ows, sedges. and ferns, and with other pos- 
sible exceptions to be agreed upon. by you and Professor Coulter. 
o . 
me whole copy is to be revised by you. 
