170 THE PLANT WOKLD 



Dr. A. W. Evans and Mr. Charles L. Pollard, acted in an advisory 

 capacity. The subsequent history of the journal is well known to its 

 friends and subscribers. 



Dr. Knowlton struck the key-note of his policy at the outset by 

 refusing to publish, under any consideration, technical descriptions of 

 new species or articles on topics of purely scientific interest; he 

 adopted the wise policy of permitting each author to follow his own 

 preferences, without correction, but advocated the use of English names 

 as much as possible. He has always believed in the theorj' that readers 

 of the journal are entitled to the best and most accurate information on 

 all subjects, and has therefor labored unceasingly to secure the gift of 

 articles from prominent botanists throughout the country, wisely con- 

 sidering that much of the stuff sheltered under the mantle of popular 

 science is unworthy of consideration. In these opinions he has always 

 been sustained by his associates, and it is indeed the best possible tes- 

 timonial to the soundness of his editorial judgment that the policy of 

 the journal has remained the same under the different managements 

 through which it has passed. 



The writer's acquaintance with Dr. Knowlton is of eight years' 

 standing. When The Plant World was established an intimate per- 

 sonal friendship rapidly grew up, which has led to our association in 

 many literary and other ventures. It is a pleasure to record the fact 

 that through these years no single misunderstanding has ever occurred 

 to mar this friendship. As a companion, Dr. Knowlton is attractive 

 through his interest in men and affairs, and he is thoroughly well- 

 informed on many subjects. He has a keen sense of humor, which 

 some of his editorial experiences tend to develop, and he is an enter- 

 taining raconteur. 



Dr. Knowlton's principal literary works, other than the innumer- 

 able short articles that he has published in various magazines, are the 

 following, which have appeared through the U. S. Geological Survey : 

 "Fossil Flora of the Yellowstone National Park ; " "A Catalogue of the 

 Cretaceous and Tertiary Plants of North America;" "Fossil Wood and 

 Lignite of the Potomac Formation," and "Fossil Flora of Alaska." 

 His name has been commemorated in connection with a rare tree, the 

 hop-hornbeam of Arizona, Ostrya Knowltoni : a moss, Bryiim KnowUoni, 

 and many fossil plants have also been dedicated to him. 



At his charming home in Laurel, Maryland, he spends much of his 

 leisure time in his garden and greenhouse, where he has quite an as- 

 sortment of plants. In past years he has made several field trips to the 

 West, from which he has brought valuable collections. 



