I 



NOTES AND COMMENT 



It is often difficult, under existing conditions, for a young man who 

 is seeking a position in botany, or any of the alUed sciences, to bring 

 his quaUfications to the attention of those who might wish to secure 

 his services. Those upon whom it devolves to fill the vacant posts and 

 chairs in our profession, or to secure men for new developments, often 

 experience an equal difficulty in learning who are the eligibles from 

 whom they might select. With a view to aiding both sides of this 

 situation The Plant World has inaugurated a Professional Advance- 

 ment (Johunn, which will be maintained continuously in its advertising 

 pages provided it is given any support whatever. This column is 

 designed primarity to serve the men who are seeking professional posi- 

 tions, but it may also be of utility to those who are desirous of adver- 

 tising for men of particular qualifications. Further details of the plan 

 will be found in the advertising pages of the present issue. 



The sixth volume of the Memoirs of the New York Botanical Garden 

 is devoted to the publication of some thfi-ty-six papers which w'ere pre- 

 sented at the Twentieth Anniversary of the Garden in September, 1915. 

 The following titles will serve to indicate the scope of the contents: 

 The mechanism and conditions of growth, by D. T. MacDougal; Obser- 

 vations on inheritance of sex-ratios in Mercurialis annua, b}' Cecil 

 Yampolsk}^; Triassic plants from Sonora, Mexico, by Edwin W. Hum- 

 phreys; A white cedar swamp at Merrick, Long Island, and its sig- 

 nificance, by Nonnan Taylor; On the nature of types in Pediastrum, 

 by R. A. Harper; Endemism as a criterion of antiquity among plants, 

 by Edmund W. Sinnott; The development of Lepiota, by George F. 

 Atkinson; Plant ecolog}- and the new soil fertility, by Charles B. Lip- 

 man ; Self- and cross-pollinations in Cichorium intyhus with reference to 

 sterility, by A. B. Stout; Vegetative life zones of the Rocky Mountain 

 region, by P. A. Rydberg; The embiyo-sac and pollen grain as colloidal 

 systems, by Francis E. Lloyd; The vegetation of Anegada, by N. L. 

 Britton. 



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