New Fourth Edition Revised and Enlarged Suplee's Mechanical Engineer's Reference Book A Hand-book of Tables, Formulas, and Methods for Engineers, Students and Draftsmen By Henry Harrison Suplee, B.Sc., M.E. Member American Society of Mechanical Engineers; Membre de la Société Des Ingénieurs Civils de France; Mitglied des Vereines Deutscher Ingenieure; Member o The Franklin Institute. Illustrated. 964 pages. 16mo. Full limp leather, round corners, gilt edges, thumb index. $5.00 net HIS book is intended to form a standard hand-book TH for the mechanical engineer and the designer of machinery, supplying in convenient form the general information which is constantly required. In the new fourth edition the few errors in the previous edition have been corrected and an Appendix of forty pages added, containing a variety of useful information. Several features make this the one up-to-date complete accurate work for mechanical engineers,-more space has been devoted to Mathematics than in any other similar reference book in English,—the subject of machine design is very amply treated,—the arrangement of the matter is unexcelled, and fully illustrated, which together with the complete thumb index, makes it just the book for quick reference. Send for Bulletin of New Scientific Books J. B. LIPPINCOTT COMPANY Publishers Philadelphia Your courtesy in mentioning the Journal will be appreciated of AUG 1 2 1915 The Franklin Institute DEVOTED TO SCIENCE AND THE MECHANIC ARTS Edited by R. B. OWENS, E.E., M.A., D.Sc., F.R.S.C. The Effect of the End Connections on the Distribution of Stress in Certain Modern Theories of Magnetism. By George Flowers Stradling A Flicker Photometer Attachment for the Lummer-Brodhun Contrast Photometer. By E. F. Kingsbury . Notes from the U. S. Bureau of Standards: No. 2 129 173 199 215 The Use of Sodium Salts in the Purification of Clays and in the Casting Process. 225 227 The Brightness-difference Sensibility of the Eye under Various Brightness of Test- 235 Energy-density in the Eye-media 237 Visual Pattern-discrimination in the Vertebrates: III.-Difference-threshold for 238 |