No. 3, April, 1921] FORESTRY 239 



1620. Anonymous. The British Empire forestry conference. Nature 105: 759-760. 1920. 

 — •Commission organized Nov. 1919, met in London July 7-22. Proposal to organize an 

 Imperial Forestry Bureau to act as a clearing house of information; to establish a research 

 institute to deal with cultural problems and another for utilization problems. Conference 

 held that an institution for training forest officers should be established.— 0. A. Stevens. 



1621. Anonymous. Gymnospermic history. (Rev. of: Seward, A. C. Fossil Plants: 

 A text-book for students of botany and geology. Vol. 4, Ginkgoales, Coniferales, Gnetales. 

 xvi + 54S p. University Press: Cambridge, 1919.] Nature 105:97-98. 1920.— See Bot. 

 Absts. 7, Entries 379, 383. 



1622. Anonymous. Oil, sugar and alcohol from an African tree. Sci. Amer. 123: 175. 

 1920. — 'A brief note concerning the sump tree, Balanites aegyptiae Del. — -Chas. H. Otis. 



1623. Anonymous. State to grow nursery trees. Amer. Nurseryman 32^: 120. 1920. — • 

 The Pennsylvania department of forestry plans to grow several thousand young forest trees 

 in nurseries at various state institutions. After the trees are 3 years old they will be planted 

 by private interests and by the department of forestry. — J. H. Gourley. 



1624. Berry, E. W. The ancestors of the sequoias. Sci. Amer. Monthly 2:207-208. 

 1920.— See Bot. Absts. 7, Entry 385. 



1625. Bertrand, Gabriel. Des conditions qui peuvent modifier I'activite de la chloro- 

 picrine vis-^-vis des plantes superieures. [The conditions which frequently modify the effect 

 of chloropicrine upon the higher plants.] Compt. Rend Acad. Sci. Paris 170: 952-954. 1920. — 

 See Bot. Absts. 7, Entry 439. 



1626. Burns, George P. Eccentric growth and the formation of redwood in the main stem 

 of conifers. Vermont Agric. Exp. Sta. Bull. 219. 1-10, PL 4, 10 fig. 1920.— See Bot. Absts. 

 7, Entry 318. 



1627. Chaney, Ralph W. The flora of the Eagle Creek formation. Cont. Walker Mus. 

 2^: 115-182. PL 5-22. 1920.— See Bot. Absts. 7, Entry 389. 



1628. CoRREA Mendes, F. C. A panheira. [Silk cotton.] Bol. Agric. Nova Goa [Portu- 

 guese East India] 1 : 37-44. 1919. — 'Three species of trees yielding the product known as silk 

 cotton or kapok are briefly described, Bovibax malabaricum white or red silk cotton tree, 

 Cochlospermum gossypium yellow silk cotton tree, and Eriodendron anfractuosum ( Ceiba pen- 

 tandra) silk cotton tree or kapok. A general discussion follows covering seed collection, nur- 

 series, formation of plantations, collecting the cotton, its preparation for market, uses and 

 yields. — John A. Stevenson. 



1629. CoRRicA Mendes, F. C. Viveiros. [Nurseries.] Bol. Agric. Nova Goa [Portu- 

 guese East India] 1 : 45-49. 1919. — 'A popular discussion of nurseries for forest tree seedlings, 

 including choice of site, preparation of the soil, cultural directions, and transport of the 

 plants when ready for final planting. — -John A. Stevenson. 



1630. Coville, Frederick V. The influence of cold in stimulating the growth of plants. 

 Proc. Nation. Acad. Sci. [U. S.] 6: 434-435. 1920.— See Bot. Absts. 7, Entry 434. 



1631. CowELL, Arthur Westcott. Awbury Arboretum Address. Bull. Geog. Soc. 

 Philadelphia 17: 98-102. July, 1919.— See Bot. Absts. 7, Entries 88, 1619. 



1632. Dacy, G. H. How a state may grow a timber supply. Sci. Amer. 123: 199. 3 fig. 

 1920.— An article dealing with a bill submitted to the state legislature of Massachusetts con- 

 taining a practical and profitable plan for remedying the timber crisis in that state. — Chas. 

 H. Otis. 



