668 



INDEX 



Vol. Page 

 1891, What We Have Been Doing, C. C. Nutting I, III, ;s5 



1894, Recent Advances in the Theory of Solutions, 



L. W. Andrews II, 13 



1895, Needed Changes in Scientific Methods, H. W. 



Norris Ill, 17 



1897, T. H. Macbride V, 12 



1898, The Academy and the People, T. H. Macbride.. VI, 16 



1899, Science of a Hundred Years Ago, W. S. Hen- 



drixson VII, 22 



1900, The Social Service of Science, W. H. Norton VIII, 17 



1901, Relation of Physics to Other Material Sciences, 



A. A. Veblen IX, 21 



1902, Some Problems of Heredity and Evolution, H. 



E. Summers : X, 26 



1904, Two Centuries of North American Lichenology, 



B. Fink XI, 11 



1905, Botany in Its Relation to Good Citizenship, B. 



Shimek XII, 1 



1906, A Review of the Development of Mineralogy, 



M. P. Arey XIII, 7 



1907, Influence of Modern Science in the Formation 



of Ideals, C. O. Bates XIV, 7 



1908, Science for General Education, J. L. Tilton XV, 13 



1909, The Work of the Iowa Geological Survey, Sam- 

 uel Calvin XVI, 11 



1912, The Mission and Spirit of the Pure Scientist, L. 



Begeman XIX, 11 



1917, Recent Progress in Physics, G. W. Stewart XXIV, 29 



1918, Does the History of Science Have a Place in 



the College Curriculum? L. S. Ross XXV, 33 



Projection, Stereoscopic, in Natural Colors. C. F. Lorenz. . XI, 75 



Protective Adaptations, See Birds. 



Protein, See Calcium. 



Protozoa from Fayette, G. W. Wilson XV, 169 



Observations on, C. S. Spencer XXIV. 335 



Prunus americana. Development of, R. E. Buchanan XI, 77 



Pselaphidse, See Scydmsenid^e. 



Pscudomonas janthiiui. Growth and Pigment Production 



of, H. F. Watt XIII, 173 



See Violaceus laurentius. 



Psychogram in Vocational Guidance, C. E. Seashore XXII, 341 



Psychology, Animal, New School of, C. C. Nutting VII, 40 



See Advertisements, Voice. 



Psyllidae, Hackberry, Found at Ames, C. W. Mally 



I, 7F. 131; II, 152 



Puffball, See Secotium. 



Puget Sound, See Wylie XVI, 99 



Pyridine, Electromotive Forces and Electrode Potentials 



in, F. S. Mortimer and J. N. Pearce XXIII, 51 



Pyrus, Seeds of, L. H. Pammel and Luella Robb XV, 47 



