644 EXPERIMENT STATION RECORD. 



Forest surveying: A text-book and manual, P. Schill (Forstvermessung. 

 Bin Lchr- niid Iluiidbiich. Eisenach, I'JIl, 2>i>- ^+2-'/6, tables S, figs. 216). — The 

 l)resent work has been designed to meet the needs of forestry students and prac- 

 titioners in surveying and platting forest areas. Introductory remarks deal 

 with the general principles of surveying. Part 1 treats of the various aids 

 and necessary instruments for forest surveying; part 2 discusses the methods 

 and operations involved in making measurements; part 3 treats of map making; 

 and pai't 4 deals vk^ith the computing and division of areas. 



Wood used by the manufacturers of furniture and cars, agricultural im- 

 plements and vehicles, and veneer in Canada, 1910, H. R. MacMillan, B. 

 Robertson, and W. G. H Boyce {Dept. Int. Canada, Forestry Branch Bui. 

 2'i, li)l2, pp. Ji2). — In the present report an attempt is made to trace the 

 further manufacture of lumber after it leaves the sawmill by the above classes 

 of manufactures in Canada. The data show the amounts of wood used both 

 by species and by Provinces, together with prices paid for different species. 

 The amount of timber and veneer wood imported is also considered. 



The preservation of power transmission poles, W. R. Wheaton {Engin. 

 Rec, 65 {If) J 2), No. 3, pp. 7S-7.9). — ^An account is given of an experimental line 

 of treated western yellow pine poles set by the San Joaquin Light and Power 

 Corporation in 1908. 



At the end of 27 months 27 per cent of the ix)les given a brush treatment with 

 creosote, 29 per cent of the poles painted with carbolineum, 45 per cent of 

 those treated with crude oil, and 28 per cent of those treated with zinc chlorid 

 showed signs of decay, whereas the iwles treated with creosote in the open tank 

 (over 50 per cent of the entire line of 600 poles) were all perfectly sound and 

 showed no signs of decay. Similar results are being obtained with western 

 red cedar. Creosote is i>referred to zinc chlorid because when the poles are 

 in the middle of iiTigated fields the zinc is washed out and they have to be 

 replaced after a brief service. 



Treating seasoned v. unseasoned ties, F. J. Angieb (Engin. News, 61 (1912), 

 No. 6, p. 2Jtl). — This is an abstract of a paper presented at the annual meeting 

 of the Wood Preservers' Association, at Chicago, January, 1912, and containing 

 data showing the comparative costs and values of seasoned and unseasoned 

 ties as treated by the Baltimore and Ohio Railroad. 



In addition to the better penetration of preservatives in the seasoned ties, 

 there appears to be a difference of 1.33 cts. i)er tie in favor of treating seasoned 

 ties. 



The evaporation of creosote and cmde oils, P. E. Fredendoll {Engin. Rec, 

 Go {1912), No. 3, pp. 79, 80). — Data are given on evaiwratiou studies of rail- 

 road ties treated with creosote at different times by the Atchison, Topeka and 

 Santa Fe Railroad. Tiaboratory tests of different mixtures were also con- 

 ducted. 



Comparing the analyses of the creosotes before and after evaporation, those 

 showing the largest loss were the ones originally having the largest per- 

 centages of the low-boiling oils. The author concludes that there is need of 

 more work toward finding some oil or tar that mixed with creosote will lessen 

 the rate of evaporation of the creosote from the mixture. The exact effect of 

 the addition of a high-boiling crude oil has not been determined as yet in these 

 tests. 



Scientific management of timber treating plants, D. Burkh alter (Engin. 

 Rec, 65 (1912), No. 3, p. 78). — This i>aper briefly discusses the general prin- 

 ciples of scientific management of industrial plants, and points out the appli- 

 cation of certain of these principles to specific problems of timber treating. 



