122 JOURNAL OF FORESTRY 



The results of different planting methods leave us in doubt which to 

 use except that the mattock-slit method without removal of sod is not 

 to be recommended. 



The now much contested theory of tolerance receives confirmatory 

 evidence. While we hold tenaciously to the importance of light rela- 

 tions — we had not expected that the shade "afforded by grass and 

 weeds during the first two years," especially during dry weather, could be 

 made beneficial ! We are inclined to think that another reason for the 

 results of the removal of grass and weeds must be found, than that "the 

 high percentage of loss was caused by sudden exposure of the young 

 trees to hot sunshine when the protection that had been given them by 

 the grass was taken away." 



In a table the conditions of the various plantations are clearly 

 stated. When the percentage of living plants in thirteen years is still 

 60 and 65 per cent and for those of younger age lies mostly above 80 and 

 up to 95 per cent, we can say that all plantations (coniferous) have 

 prospered unusually well. The white pine weevil and the unfortunate 

 blister rust have, however, damaged the white pine in various planta- 

 tions. 



For the discussion of yields two older sets of plantations, from 15 to 

 44 years old, were available. The oldest series of plantings at White 

 Lake Corners by the late Mr. T. Dallarme was begun in 1870 with 

 white pine, European larch, Scotch pine, and sugar maple. Other of 

 his plantings were 31, 35, and 40 years old, all on Adirondack stony 

 loam, site I. 



The oldest plantations were calculated to have produced over 

 38,000 feet board measure with 408 trees per plot, the 31 -year-old 

 stand producing 18,440 board feet with 760 trees. Other plantings 

 indicate a product of around 7,000 cubic feet in 40 years, which is better 

 than any production usual in Germany. 



B. E. F. 



Protection of Life and Property Against Lightning^ 

 Although the object of this publication is "to present the informa- 

 tion at present available on the subject of protection against lightning, 

 with a view to bringing about a greater uniformity of practice in the 

 installation of lightning rods, and encouraging people to make use of 



iBy O. S. Peters, Assistant Physicist'. Technologic Papers of the Bureau of 

 Stanidards, No. 56. U. S. Department of Commerce. Washington, D. C. 1915. 

 Pp. 127. 



