Cir. 19--Progress in timber physics: Bald cypress (_Taxodium distichum_). By Filibert Roth, 1898, pp. 24. Y.B. Extr. 288--Tests on the physical properties of woods. By F.E. Olmstead, 1902, pp. 533-538. Unnumbered Cir.--Timber tests. [1903], pp. 15. Unnumbered Cir.--Timber preservation and timber testing at the Louisiana Purchase Exposition. 1904, pp. 6. Cir. 32--Progress report on the strength of structural timber. By W.K. Hatt, 1904, pp. 28. Bul. 58--The red gum. By Alfred Chittenden. Includes a discussion of The mechanical properties of red gum wood, by W.K. Hatt. 1905, pp. 56. Cir. 38--Instructions to engineers of timber tests. By W.K. Hatt, 1906, pp. 55. Revised edition, 1909, pp. 56. Cir. 39--Experiments on the strength of treated timber. By W.K. Hatt, 1906, pp. 31. Revised edition, 1908. Bul. 70--Effect of moisture upon the strength and stiffness of wood. By H.D. Tiemann, 1906, pp. 144. Cir. 46--Holding force of railroad spikes in wooden ties. By W.K. Hatt, 1906, pp. 7. Cir. 47--Strength of packing boxes of various woods. By W.K. Hatt, 1906, pp. 7. Cir. 108--The strength of wood as influenced by moisture. By H.D. Tiemann, 1907, pp. 42. Cir. 115--Second progress report on the strength of structural timber. By W.K. Hatt, 1907, pp. 39. Cir. 142--Tests of vehicle and implement woods. By H.B. Holroyd and H.S. Betts, 1908, pp. 29. Cir. 146--Experiments with railway cross-ties. By H.B. Eastman, 1908, pp. 32. Cir. 179--Utilization of California eucalypts. By H.S. Betts and C. Stowell Smith, 1910, pp. 30. Bul. 75--California tanbark oak. Part II, Utilization of the wood of tanbark oak, by H.S. Betts, 1911, pp. 24-32. Bul. 88--Properties and uses of Douglas fir. By McGarvey Cline and J.B. Knapp, 1911, pp. 75. Cir. 189--Strength values for structural timbers. By McGarvey Cline, 1912, pp. 8. Cir. 193--Mechanical properties of redwood. By A.L. Heim, 1912, pp. 32. Bul. 108--Tests of structural timbers. By McGarvey Cline and A.L. Heim, 1912, pp. 1231. Bul. 112--Fire-killed Douglas fir: a study of its rate of deterioration, usability, and strength. By J.B. Knapp, 1912, pp. 18. Bul. 115--Mechanical properties of western hemlock. By O.P.M. Goss, 1913, pp. 45. Bul. 122--Mechanical properties of western larch. By O.P.M. Goss, 1913, pp. 45. Cir. 213--Mechanical properties of woods grown in the United States. 1913, pp. 4. Cir. 214--Tests of packing boxes of various forms. By John A. Newlin, 1913, pp. 23. Review Forest Service Investigations. 1913. [Outline of investigations.] Vol. I, pp. 17-21. A microscopic study of the mechanical failure of wood, by Warren D. Brush. Vol. II, pp. 33-38. Bul. 67, U.S.D.A.--Tests of Rocky Mountain woods for telephone poles. By Norman deW. Betts and A.L. Heim, 1914, pp. 28. Bul. 77, U.S.D.A.--Rocky Mountain mine timbers. By Norman deW. Betts, 1914, pp. 34. Bul. 86, U.S.D.A.--Tests of wooden barrels. By J.A. Newlin, 1914, pp. 12.