FORESTRY. 535 



The investigation shows as a whole that shortleaf pine is already one of the 

 chief sources of building material on the farms. If young stands are pro- 

 tected, full stocking secured, and the stands subsequently thinned, the yield 

 of saw timber from a 40-year-old stand can be more than doubled and its value 

 greatly increased, thereby furnishing a means of permanent income from the 

 farm woodlots. 



White pine under forest management, E. H. Fbothingham (U. ;S'. Dept. 

 Agr. Bui. 13 {191Jt)y pp. 70, pis. 7). — This bulletin summarizes the most Imiwr- 

 tant facts relative to white pine with regard both to the original forest and 

 to the second growth. Yield tables for second growth stands based on meas- 

 urements made in southern New Hampshire by C. A. Lyford and L. Margolin 

 are given, and from these data tables are derived showing the value of stump- 

 age at prevailing prices and the profit or loss resulting from the management 

 of second growth under favorable and unfavorable conditions. Methods are 

 suggested for securing the successive crops and for increasing the quantity 

 and quality of the yield. Chapters on Direct Seeding and Trotection from an 

 unpublished report on white pine by A. K. Chittenden and J. S. Ames are also 

 given. 



Owing to the success with which white pine lends itself to management, the 

 relatively steady market, and the small amount of waste in lumbering, it is 

 concluded that under widely varying conditions of quality and accessibility 

 and with the prevailing tax rates, market value, and wages, the rafsing of 

 white pine to ages of from 35 to 70 years is a profitable undertaking at 4, 5, 

 6, and sometimes 10 per cent compound interest. 



Yellow poplar in Tennessee, W. W. Ashe (Tenn. Geol. Survey Bui. 10-C, 

 1913, pp. 56, figs. 8). — This embraces the results of a survey of second growth 

 poplar stands in Tennessee, conducted cooperatively by the Forest Service of 

 the U. S. Department of Agriculture and the State Geological Survey, with 

 special reference to determining the rate of growth of the young timber, the 

 possible profit in growing it, and the best methods of management for accel- 

 erating its growth and increasing its value. The principal phases discussed 

 are commercial outlook, distribution, forest characteristics, silvical character- 

 istics, growth, increasing the yield from timber land by management and better 

 utilization, and the establishment of yellow poplar plantations, including cost 

 estimates. 



The investigation as a whole shows that not only is there an assured and 

 remunerative market for the timber of small-sized trees but its rate of growth 

 is so rapid that returns are obtained at an early period for a forest tree. 



Notes on tapping- experiment at Gunong Angsi, F. G. Spring (Agr. Bui. 

 Fed. Malay States, 2 {1913), No. 5, pp. 119-123).— The second year's results 

 from tapping experiments with Para trees at Gunong Angsi (E. S, R., 28, p. 

 239) show that tapping in adjacent quarters not only gives a higher yield than 

 tapping in opposite quarters, but that it is a much more economical system to 

 adopt. A 2-year bark renewal system is more expensive and less satisfactory 

 in yield of rubber than a 4-year bark renewal system. Trees tapped in ad- 

 jacent quarters showed a considerable increase in girth over trees tapped in 

 opposite quarters. The yield of rubber and girth of trees growing at an eleva- 

 tion of 800 ft. were somewhat greater than for trees growing at an elevation 

 of 1,000 ft. In this connection attention is called to the fact that the trees 

 growing at the lower altitude are spaced 25 by 23 ft., as compared with 15 by 

 15 ft. for trees at the higher altitude. 



The cultivation of the Tung tree (China wood oil) in the United States, 

 D. Fairchild (Paint Manfrs. Assoc. V. S. Bui. 33, pp. 4-19, figs. 6).— An account 

 of the experiments of the Bureau of Plant Industry of the U. S. Department of 



