544 EXPERIMENT STATION RECORD. 



Progress report on -wood-paving experiments in Minneapolis, F. M. Bond 

 {U. 8. Dcpt. Agr., Forest Serv. Circ. lOJi, pp. 19, figs. 5). — This circular gives 

 the results obtained after 4 years of heavy traffic in a service test on wood 

 paving blocks of various species laid in cooperation with the city of Minne- 

 apolis, Minn. (E. S. R., 19, p. 951). 



From the results thus far secured the species used are tentatively grouped 

 in order of their value for creosoted paving material as follows: (1) Longleaf 

 pine; (2) Norway pine, white birch, tamarack, and eastern hemlock; (3) 

 western larch; and (4) Douglas fir. At the beginning of the summer of 1911, 

 nearly 5 years after laying the test pavement, the Douglas fir blocks were in 

 such bad condition that it became necessary to re-lay this portion of the pave- 

 ment. This was done partly with first-class Douglas fir paving stock and 

 partly with regular southern yellow pine blocks. 



Specifications of the city of Minneapolis for good paving block oil for the 

 years 1906 and 1911, together with records of the treatment of the blocks made 

 in 1911 and travel records for different years, are appended. 



Dry rot investigations, TV(Haus'iclnvammforschungen, IV. Jena. 1911, pp. 

 95, figs 19). — The present part of Hausschwammforschungen, edited by A. 

 Mciller (E. S. R., 23, p. 254), comprises a report of the fourth and fifth ses.sions 

 of the Prussian Advisory Commission for investigations relative to dry rot; 

 the results of tests made by Falck with various chemical solutions used for pro- 

 tecting wood from dry rot ; and the following articles : 



The prevailmg methods for protecting timber used for pile work from, fungus 

 injury, Briistlein (pp. 15-47). — ^This describes the methods of protecting the 

 wood in the forest during transportation and at the sawmill, and includes 

 painting, absorption, and impregnation processes. 



The protection of construction timber from rot, H. C. Nussbau^ (pp. 48- 

 69). — This deals with methods employed during actual construction work. 



Condensed tcater formation as a factor in the destruction of beam ends in 

 exterior walls by wood-destroying fungi, R. Niemann (pp. 70-95). — A theoret- 

 ical and technical discussion of this subject, including suggestions relative to 

 improved methods of construction for the purpose of lessening the formation 

 of condensed water and for protecting beam ends from decay. 



Forest products of Canada, 1910. — Lumber, square timber, lath, and 

 shingles, H. R, Macmillan, B. Robertson, and W. G. H. Boyce [Dept. Int. 

 Canada, Forestry Branch Bui. 25, 1911, pp. 39, figs. 2). — ^The statistics here 

 reported are based upon the reports of 2,763 firms operating nearly 3,000 saw- 

 mills. The data show the quantity and value of lumber, lath, and shingles 

 used throughout the Dominion of Canada and its sevei'al Provinces, including 

 also the quantity and value of the wood of each species used and square timber 

 exported. 



The lumber, square timber, lath, and shingles produced in Canada during 

 1910 had a total value of $83,989,197. 



Manufacture and utilization of hickory, 1911, C. F. Hatch (U. S. Dept. 

 Agr., Forest Scrv. Circ. 187, pp. 16). — In continuation of a previous investiga- 

 tion of the commercial hickories in the United States (E. S. R., 24, p. 243) the 

 Forest Service in cooperation with the National Hickory Association conducted 

 an investigation to ascertain the present methods employed in the manufacture, 

 marketing, and utilization of hickory with a view to suggesting improvements. 

 The results of the investigation are embodied in this circular, including recom- 

 mendations relating to a closer and better utilization of the hickory stumpage. 



