
          interesting appx. [appendix] on Geograph. [Geographical]
 distribution. 


 Sprague is to work at 
 the cuts (all original) of
 my new elementary book  
 Lessons on Bot. & Veg. Physiology [Lessons in botany and vegetable physiology], 
 which I must drive at on my 
 return. He is also to do all
 he can on Whipple plates,
 as your desired. I have put 
 in his hands the following 
 plants, to be figured in the 
 order in which they stand in 
 the accompanying list. 


 I hope to be back about 
 the end of October, 2 months
 hence, if not sooner. 


 I am glad I consented to go. Mr. 
 Loring seems so much gratified by it.
 He pays the expenses & gives me 
 a good rest, & shutting up the house 
 saves us something in the domestic way.
        