78 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1909. 



pari of observers and investigators. It was therefore decided to publish the 

 present volume of Mathematical Tables on ' Hyperbolic functions.' 



•' Hyperbolic functions are extremely useful in every branch of pure physics 

 and in the application of physics, whether to observational and experimental 

 sciences or to technology. Thus whenever an entity (such as light, velocity, 

 electricity, or radioactivity) is subject to gradual extinction or absorption the 

 decay is represented by some form of Hyperbolic functions. Mercator's pro- 

 jection is likewise computed by Hyperbolic functions. Whenever mechanical 

 strains are regarded as great enough to be measured they are most simply 

 expressed in terms of Hyperbolic functions. Hence geological deformations 

 invariably lead to such expression, and it is for that reason that Messrs. Becker 

 and Van Orstrand, who are in charge of the physical work of the United States 

 Geological Survey, have been led to prepare this volume." 



V. PUBLICATIONS OF THE UNITED STATES NATIONAL MUSEUM. 



The publications of the National Museum are: (a) The annual report, form- 

 ing a separate volume of the Report to Congress by the Board of Regents of 

 the Smithsonian Institution; (ft) The Proceedings of the United States National 

 Museum; (c) The Bulletin of ihe United States National Museum; and (d) the 

 Contributions from the United States National Herbarium. The editorship of 

 these publications is in charge of Dr. Marcus Benjamin. 



The publications issued during the year are enumerated in the Report on 

 the National Museum. These included Volume XXXIV of the Proceedings, 

 containing Museum papers numbered 1610 to 1630 ; Volume XXXV, papers 

 numbered 1631 to 1658; and Volume XXXVI, papers numbered 1659 to 1694. 

 Three bulletins were issued : 



62. Catalogue of the Type Specimens of Mammals in the United States Na- 

 tional Museum, including the Biological Survey Collection. By Marcus Ward 

 Lyon and Wilfred H. Osgood. 



63. A Monographic Revision of the Coleoptera belonging to the Tenebrionidse 

 Tribe Eleodiini inhabiting the United States, Lower California, and Adjacent 

 Islands. By Frank E. Blaisdell, sr. 



64. A Critical Summary of Troost's Unpublished Manuscript on the Crinoids 

 of Tennessee. By Elvira Wood. 



In the series of Contributions from the United States National Herbarium 

 there appeared : 



Volume XII, part 4. The Mexican and Central American Species of Sapiuin. 

 by Henry Pittier : Volume XII, part 5, New or Noteworthy Plants from Colom- 

 bia and Central America, by Henry Pittier; Volume XII, part 6, Catalogue of 

 the Grasses of Cuba, by A. S. Hitchcock ; Volume XII, part 7. Studies of Mexi- 

 can and Central American Plants, No. 6, by J. N. Rose : Volume XII, part S. 

 The Allionacea? of the United States, with notes on Mexican Species, by Paul C. 

 Standley ; Volume XII, part 9, Miscellaneous Papers, by J. N. Rose, N. L. 

 Britton, and William Maxon; and Volume XIII, part 1, Studies of Tropical 

 American Ferns, No. 2, by William Maxon. 



VI. PUBLICATIONS OF THE BUREAU OF AMERICAN ETHNOLOGY. 



The publications of the bureau are discussed in detail in another appendix 

 of the Secretary's report. The editorial work is in charge of Mr. J. G. Gurley. 

 The Twenty-sixth Annual Report was issued during the summer, together with 

 the usual number of separates of the accompanying papers, and also Bulletins 

 34, Physiological and Medical Observations Among the Indians of Southwestern 

 United States and Northern Mexico, by Ales Hrdli<5ka, and 42. Tuberculosis 



