ANNOUNCEMENT 



THE PLANT WORLD 



The publication of The Plant World under its present name and management is dis- 

 continued with the issue for December 1919. The subscription list and good will of the jour- 

 nal have been transferred to The Ecological Society of America, and it will appear hereafter 

 as an illustrated quarterly under the title Ecology. All correspondence regarding the new 

 journal, subscriptions, changes of address, etc., should be sent to Dr. C. Stuart Gager, 

 Brooklyn Botanic Garden, Brooklyn, N. Y. 



THE PLANT WORLD COMPANY 



The members of the Plant World Association who have been financially interested in the 

 journal will retain their organization under the name The Plant World Company. All 

 orders for back volumes and single numbers of The Plant World, and all correspondence 

 in connection with the old journal should be addressed to The Plant World Company, Tucson, 

 Arizona. All books, separates, maps, lettering sheets and other publications heretofore 

 advertised may be secured from the Company. 



ORDERS FOR APPARATUS 



Orders for auxographs, dendrographs, light filters and all other apparatus handled by 

 The Plant World, except that relating to atmometry and auto-irrigation, should be sent to 

 The Plant World Company All orders for atmometers, rain-correcting mountings, auto- 

 irrigators, porcelain spheres and cones, and cobalt chloride paper and clips, should be ad- 

 dressed to the Laboratory of Plant Physiology, Johns Hopkins University, Baltimore, Md. 



PROFESSIONAL ADVANCEMENT SERVICE 



This service, formerly maintained by The Plant World, has been transferred to the 

 pages of the American Journal of Botany, and all correspondence regarding it should be 

 addressed to Dr. C. Stuart Gager, Brooklyn Botanic Garden, Brooklyn, N. Y. 



CACTI AND DESERT PLANTS 



Orders for ornamental cacti, desert shrubs and plant material should be addressed to 

 The Plant World Company. A price-list of cacti will be sent on application. 



THE PLANT WORLD COMPANY, 



TUCSON, ARIZONA 



