Periodical Literature. 731 



Beech is most stimulated to germination by freezing on snow 

 for 5 weeks and germinating in diffuse light. 



For Black Locust the scalding with boiling water was found 

 best. 



Germination proceeds more rapidly in light than in shade and 

 is most satisfactorily accelerated in diffuse light. 



Soaking for 24 hours in room temperature proved favorable in 

 case of spruce, larch and Austrian Pine, but Scotch Pine germi- 

 nated better without such soaking. 



Dry freezing invariably improved the germination per cent, 

 White Pine increasing after 26 days freezing by 46% and after 

 five weeks on snow by 52%. 



Ueber den EinHuss verschiedener Belichtung und extremer Temper- 

 attiren auf den Verlauf der Keimung forstlichen Saatgutes. Centralblatt 

 fiir das gesammte Forstwesen. April, May, 1912. Pp. 157-172; 213-224. 



fTbose engaged in scientific research of 



Plant plant development will be interested in Dr. 



Experiment Moller's account of his "vegetation house," 



House. which he has tested for two years at the 



experiment station at Eberswalde. 



The requirements for such a house are stated. The detail of 



its construction given and illustrated. The character of the 



work done in this plant house is elucidated by a few examples. 



Bin neues V egetationshaus und seine praktische Erprobung. Zeitschrift 

 ftir Forst-und Jagdwesen. September, 1912. Pp. 528-538. 



SILVICULTURE, PROTECTION AND EXTENSION. 



H. C. Walker criticizes Troup's plan of 

 Selection adopting the uniform system of managing 



vs. teak in Burma ; Walker advocates a con- 



Uniform System tinuance of the selection system because a 

 for Teak. change would be "an elaborate and com- 



plicated matter," the transport difficulties 

 would be increased, the yield would be irregular particularly at 

 the fifth period on a 150 year rotation, natural regeneration and 

 cleanings would be more difficult, artificial regeneration difficult 

 and expensive because of the bamboo growth, an even aged stand 

 of a mixed forest such as teak is impossible, and the export trade 

 would be ruined owing to the irregular yield during the first 



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