36 DEPARTMENTAL KEPOETS. 



During the year 1,677 unmounted photographic prints were given 

 away in response to requests from 28 different States, chiefly to 61 

 educational institutions and for illustrating 57 books and articles on 

 forestry. Two hundred and ninety-seven prints were received by 

 exchange. 



One hundred and fourteen prints, 209 slides, 23 transparencies, and 

 8 bromide enlargements were sold. 



The lantern-slide collection contains 3,581 slides, 700 of which were 

 added during the year. One thousand slides and 31 transparencies 

 were colored this year. The colored slides made by the Forest Serv- 

 ice greatly surpass in truthfulness any others known to us. 



Loans of 2,355 lantern slides were made for educational use to 56 

 applicants from 26 different States, as against 1,861 last year. 



EXPOSITIONS. 



The exhibit made by the Forest Service at the Lewis and Clark 

 Exposition was closed October 15, 1905, and the material returned to 

 "Washington. 



About 200 transparencies and bromide enlargements were sent to 

 the New England Forest, Fish and Game Exhibit at Boston, Mass., 

 beginning December 27, 1905. 



WOEK FOR THE ENSUING TEAR. 



It is planned to continue for the regidar period of three years dur- 

 ing which a turpentine crop is worked, the study begun in 1905-6 of 

 the effects of shallow and deep chipping and varying width of faces 

 on the flow of resin and the life of the trees. 



Much inquiry has been received from Western timberland owners 

 as to the possibility of turpentining Western pitch pines. An inves- 

 tigation of this question will be undertaken. A study of the charac- 

 teristics of turpentines will be continued. One result will be to show 

 that untried pines may be profitably worked for commercial turpen- 

 tine. 



In connection ^^ith the experiments in basket willow growing 

 already under way, an attempt will be made to ascertain whether, by 

 the use of Eurojsean stock, strains superior to any now grown here 

 can be made available. 



Special studies of various forest tree species and of forest types 

 and their distribution Avill seek more accurate knowledge and data 

 for mapping our forests and for regional manuals. 



FOREST PRODUCTS. 



The year has been marked by a higher standard of efficiency, com- 

 bined with simpler and less laborious methods. The work is classified 

 under the four sections of Wood Preservation, Dendro-Chemistry, 

 Timber Tests, and Lumber Trade. 



AVOOD PRESERVATION. 



The importance of preservative treatment of wood — railroad ties, 

 mine timbers, telephone and telegraph poles, cross-arms, piles, fence 

 posts, and even shingles and other forms exposed to rapid decay — 



