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The Knox Arboretum and Botanic Garden, between Thomaston 
and Warren, Maine, is being developed under the auspices of the 
Knox Academy of Arts and Sciences. This institution, established 
in 1908, now has sixty acres, but the director, Mr. Norman W. 
Lermond, states that this area will, in time, be increased to 100 
acres and possibly more. There is a growing library and her- 
barium, and the trees are to be grouped systematically by families, 
There has already been published a “ List of trees and shrubs in 
Knox Arboretum. 
La Societe National d’Horticulturc, France, held on May 26 to 
June 2, at the Jardin d’Acclimatation, the first of two international 
horticultural exhibitions for 1922. The exhibition was devoted to 
roses, flowering shrubs and herbaceous plants, forced fruits, le- 
gumes, horticultural industries, and horticultural beaux-arts, etc. 
The second exhibit, to be held from October 26 to November 5, 
1922, will be reserved for chrysanthemums, flowering plants of the 
season, fruits, fruit-tree arboriculture, legumes, and horticultural 
industries and beaux-arts. All horticulturists, arboriculturists, 
kitchen gardeners, tradesmen, professionals, and amateurs of every 
allied and neutral country are invited to participate. There will 
be a congress, excursions, horticultural conferences, etc. A full 
program may be obtained by writing to 84 Rue de Grenelle, Paris— 
7°: 
World List of Sctentific Periodicals—The Conjoint Board of 
Scientific Societies, Burlington House, London, W. I., has issued, 
under date of February 27, 1922, a circular letter which reads, in 
part, as follows: | 
“The Conjoint Board of Scientific Societies proposes, if suffi- 
cient support is obtained, to arrange for the issue of a world list of 
periodical publications which contain the results of original scien- 
tific research. 
“The list will be an octavo volume containing, in alphabetical 
order, the titles and places of publication of all such periodicals in 
existence on January TI, 1900, and of all issued after that date. 
“Libraries in London, Oxford, Cambridge, Edinburgh, Dublin, 
and Aberystwith which take in these periodicals will be indicated 
in the list, and, in the case of rare periodicals, not taken in by any 
