ll EDITORIAL PREFACE. 
and so they are incorporated into the letter-press, along with several original illustrations of the 
kind, such as the page of grape-seeds which illustrated Dr. Engelmann’s well-known essay on the 
American Grape-vines in the Catalogue of Bush and Son and Meisner, and the large and excellent 
figures illustrating articles which he from time to time contributed to the “ Gardeners’ Chronicle,” 
edited by his friend Dr. Maxwell T. Masters. Most cordial thanks are due to Mr. Bush and to 
Dr. Masters for the prompt and valuable gift of these electrotypes; also to the Smithsonian 
Institution for facilitating the transmission of the “ Gardeners’ Chronicle” electrotypes from 
London. 
The artotype portrait of Dr. Engelmann which faces the titlepage, made by Brimmer and Kalb 
of St. Louis from the best photograph extant, is from the same negative as that published in the 
fourth volume of the “Transactions of the Academy of Science of St. Louis,’ and is used by the 
permission of the Academy. 
It has been thought proper to append to this Preface the memorial in which the American 
Academy of Arts and Sciences expressed its sense of the loss which science had sustained in the 
death of Dr. Engelmann. But it is better that the writings should fully speak for themselves. 
That the present collection may most beneficially serve to perpetuate his memory and services 
among botanists is the hope and expectation of his surviving associate, 
ASA GRAY. 
CAMBRIDGE, MAssacHUSETTS, 
March 25, 1887. 
