944 EXPERIMENT STATION RECORD. 



Progress of wood preservation in 1906, ('. G. Crawford {Forestry and 

 Irriii.. 1-i { l'.i(i7). \(). 3, iip. l.i.>-l.is. jifis. .1). — In this paper, whicb was originally 

 presented at the annual meeting of the Wood Preservers' Association, ]\Iemi)his, 

 Tenn., January, l!t(>7, the author discusses the advancement made in the preser- 

 vation of wood during the past few years. 



Prior to 1901 there were about 15 timber-treating plants in the United States. 

 At present, they number about 50, 5 having been erected in 1900 alone. The 

 author states that consumers now realize that artificial preservation nmst be 

 employed, not only because the renewal i)f certain species of wood is luiusually 

 expensive, but because such jireservation greatly reduces the amount of struc- 

 tural timber required. The investment of large sums in extensive engineering 

 enterprises is also creating a prudent regard to the future supply of timber. 



The activity in wood preservation is said to have manifested itself along the 

 following lines : An increase in the number and capacity of treating plants, 

 improvement in the existing methods, the introduction of new methods from 

 abroad, together with the development of methods peculiarly American and 

 designed to meet American requirements, and a promoting of a more careful 

 and detailed study of the technology of American woods, with an investigation 

 of the constituents and properties of the preservatives in general use. The 

 author discusses these various phases somewhat in detail. 



Forest products of the United States, 1905, R. S. Kellogg and H. JNI. Hale 

 (V. »S'. Dcpt. A(/r., Forest >Scrr. Bui. 7'/, pp. 69). — This bulletin contains detailed 

 statements upon the lumber cut, cross-ties, tight cooperage stock, tan l)ark, and 

 the wood used for nune timbers, pulp, veneer, and distillation in 1905. 



The subject-matter has been previously published in a series of Forest Service 

 circulars (E. S. R., 18, pp. 447, 448, 642, and 745). 



The timber supply of the United States, II. S. Kellogg (Forestry and 

 Irrig., 13 (1907), A'o. .'/, pp. 1S7-193). — A large number of statistics upon the 

 timber supply of the United States are brought together in convenient form for 

 comparison and reference. These statifitics are derived for the most part from 

 census reports, bulletins of the Forest Service, and lumbermen's estimates. 



Tables are given and discussed showing the lumber cut by States of the TTnited 

 States fnmi 1880 to 1900, inclusive, the estimated stumpage of the TTnited States 

 from 1880 to 1905, and the estimated stunqiage and cut of yellow ]iine in 7 

 southern States. 



DISEASES OF PLANTS. 



A text-book of fungi, G. Massee (Loiiiloii: DiirJnrnrth d- Co.. 1900. pp. 

 XI-\-Ji27, figs. I'll). — The author's object in this book is to call attention to 

 some of the more i-ecent contributions on the mori)hology, biology, and physi- 

 ology of fungi, and to indicate where further information on these lines of 

 research may be obtained. 



After a discussion of the anatomy of fungi, accounts are given of the formation 

 of spores, methods of reproduction, effects of various physical and chemical 

 agents on growth of fungi, parasitism, symbiosis, biological forms, geographical 

 distribution, ecology, etc. A special chapter is given to the author's views on 

 the phylogeny of fungi, and, after a description of the diseases due to fungi, 

 their propagation, and legislation regarding plant diseases, a general scheme 

 of elassifieation is presented, which is a modified form of that of Brefeld. 



Report of the plant pathologist, R. E. Smith (California Sta. Bill. IS.'/, pp. 

 219-2^8. figs. 12). — A review is given of the work carried on by the plant path- 

 ologist during 190G, the principal investigations having been made on jiear 

 blight, walnut blight, browu rot of lemons, beet blight, peach blight or shot-hole 



