21. The history of arithmetic [electronic resource] / by Louis Charles Karpinski. Karpinski, Louis Charles, 1878-1956 [Browse] Chicago ; New York : Rand McNally, c1925. Book Online Nineteenth Century Collections Online (NCCO): Science, Technology, and Medicine: 1780-1925.
22. The history of three-color photography [electronic resource] / by E[dward] J[ohn] Wall. Wall, E. J. (Edward John), 1860-1928 [Browse] Boston, Mass. : American Photographic Pub. Co., 1925 (Hammond, Ind. : W.B. Conkey Co.) Book Online Nineteenth Century Collections Online (NCCO): Science, Technology, and Medicine: 1780-1925.
23. Illuminating engineering [electronic resource] : prepared by a staff of specialists for students and engineers / editors, Francis E. Cady, Henry B. Dates ; contributors, L.J. Buttolph ... [et al.]. Cady, Francis E. (Francis Elmore), 1876- [Browse] New York : J. Wiley & Sons, Inc. ; London : Chapman & Hall, Ltd., 1925 (Boston : Stanhope Press) Book Online Nineteenth Century Collections Online (NCCO): Science, Technology, and Medicine: 1780-1925.
24. Lighting fixtures and lighting effects [electronic resource] / by M. Luckiesh. Luckiesh, Matthew, 1883-1967 [Browse] New York ; London : McGraw-Hill book Co., 1925 (York, Pa. : Maple Press Co.) Book Online Nineteenth Century Collections Online (NCCO): Science, Technology, and Medicine: 1780-1925.
25. Matematiker kongressen i København 31. august-4. september, 1925 [electronic resource] : den sjette Skandinaviske Matematikerkongres Beretning / udgiven af Kongressens organisationskomite. Skandinavian Congress of Mathematicians (6th : 1925 : Copenhagen) [Browse] København : [J. Gjellerups forlag], 1925. Book Online Nineteenth Century Collections Online (NCCO): Science, Technology, and Medicine: 1780-1925.
26. Munsell color atlas [electronic resource]. Munsell Color (Firm) [Browse] Baltimore, Md. : Munsell Color Co., 1925. Book Online Nineteenth Century Collections Online (NCCO): Science, Technology, and Medicine: 1780-1925.
27. The origin of species by means of natural selection, or, The preservation of favored races in the struggle for life [electronic resource] / by Charles Darwin. Darwin, Charles, 1809-1882 [Browse] [New York] : Burt, [1925?] Book Online Nineteenth Century Collections Online (NCCO): Science, Technology, and Medicine: 1780-1925.
28. The origin of species [electronic resource] / by Charles Darwin. Volume I [-II]. Darwin, Charles, 1809-1882 [Browse] [New York] : Books, Inc. Publishers ; New York Boston, [1925?] Book Online Nineteenth Century Collections Online (NCCO): Science, Technology, and Medicine: 1780-1925.
29. Principia mathematica [electronic resource] / by Alfred North Whitehead and Bertrand Russell. Whitehead, Alfred North, 1861-1947 [Browse] Cambridge [Eng.] : University Press ; New York : Macmillan, 1925-1927. Book Online Nineteenth Century Collections Online (NCCO): Science, Technology, and Medicine: 1780-1925.
30. Service color chart [electronic resource]. New York : Devoe & Raynolds Co., Inc., 1925. Book Online Nineteenth Century Collections Online (NCCO): Science, Technology, and Medicine: 1780-1925.
31. Sins of science [electronic resource] / by Scudder Klyce. Klyce, Scudder, 1879-1933 [Browse] Boston, Mass. : M. Jones Co., 1925 (Colonial Press) Book Online Nineteenth Century Collections Online (NCCO): Science, Technology, and Medicine: 1780-1925.
32. Stone, brick, and concrete [electronic resource] / prepared under the supervision of C.K. Smoley. Smoley, C. K. (Constantine Kenneth), 1869-1952 [Browse] Scranton, Pa. : International Textbook Co., 1925. Book Online Nineteenth Century Collections Online (NCCO): Science, Technology, and Medicine: 1780-1925.
33. The story of electricity from Thales to Einstein [electronic resource] / by W.F.F. Shearcroft. Shearcroft, W. F. F. (William Francis Fairfax), 1884- [Browse] [London : E. Benn Ltd., 1925] Book Online Nineteenth Century Collections Online (NCCO): Science, Technology, and Medicine: 1780-1925.
34. Transmission towers [electronic resource]. Pittsburgh, Pa. : American Bridge Co., c1925 (Eddy Press Corp.) Book Online Nineteenth Century Collections Online (NCCO): Science, Technology, and Medicine: 1780-1925.
35. A treatise on electricity [electronic resource] / F.B. Pidduck. Pidduck, Frederick Bernard, 1885- [Browse] Cambridge [England] : University Press, 1925 (W. Lewis) Book Online Nineteenth Century Collections Online (NCCO): Science, Technology, and Medicine: 1780-1925.
36. Über schwimmende Körper und Die Sandzahl [electronic resource] / von Archimedes ; Übersetzt und mit Anmerkungen versehen von Arthur Czwalina. Archimedes [Browse] Leipzig : Akakemische Verlagsgesellschaft, 1925. Book Online Nineteenth Century Collections Online (NCCO): Science, Technology, and Medicine: 1780-1925.
37. Vision by radio, radio photographs, radio photograms [electronic resource] / C. Francis Jenkins ... Jenkins, C. Francis (Charles Francis), 1867-1934 [Browse] Washington, D.C. : National Capital Press, c1925. Book Online Nineteenth Century Collections Online (NCCO): Science, Technology, and Medicine: 1780-1925.
38. The ways of life [electronic resource] / by Richard Swann Lull. Lull, Richard Swann, 1867-1957 [Browse] New York : Harper & Bros., 1925. Book Online Nineteenth Century Collections Online (NCCO): Science, Technology, and Medicine: 1780-1925.
39. Alternating-current armature winding [electronic resource] / by Terrell Croft. Croft, Terrell, 1880-1967 [Browse] New York : McGraw-Hill Book Co. ; London : Bouverie, 1924. Book Online Nineteenth Century Collections Online (NCCO): Science, Technology, and Medicine: 1780-1925.
40. The calculus of observations [electronic resource] : a treatise on numerical mathematics / by E.T. Whittaker and G. Robinson. Whittaker, E. T. (Edmund Taylor), 1873-1956 [Browse] London ; Glasgow : Blackie and Son ltd., 1924. Book Online Nineteenth Century Collections Online (NCCO): Science, Technology, and Medicine: 1780-1925.