| 199869 |  | Steinmetz S.P. | Theory and Calculation of Transient Electric Phenomena and Oscillations | 1920  • | •• | 
	| 143230 |  | Marvin W. | A First Book of Metaphysics | 1920 | •• | 
	| 155407 |  | Friend J. | A textbook of inorganic chemistry vol.IX p.I Cobalt, Nickel, and The Elements of The Platinum Group | 1920 | •• | 
	| 105575 |  | Ince E.L. | Ordinary Differential Equations | 1920 | •• | 
	| 109277 |  | von Eberhard O.R. | Zech-Cranz' Aufgabensammlung zur theoretischen Mechanik nebst Aufloesungen | 1920 | •• | 
	| 113232 |  | Forsyth A.R. | Lectures on the Differential Geometry of Curves and Surfaces | 1920  • | •• | 
	| 115121 |  | Radin P. | The autobiography of a winnebago indian | 1920 | •• | 
	| 115127 |  | Carmichael R.D. | The theory of relativity | 1920  • | •• | 
	| 110876 |  | Maxwell J.C. | Matter and Motion | 1920 | •• | 
	| 179556 |  | Cain J. | The Chemistry and Technology of the Diazo-Compounds | 1920 | •• | 
	| 180011 |  | Ïåðåëüìàí ß.È. | Çàíèìàòåëüíàÿ ôèçèêà. Êíèãà 2 | 1920  • | •• | 
	| 195011 |  | Spence L. | An Encyclopaedia of Occultism: A Compendium of Information on the Occult Sciences, Occult Personalities, Psychic Science, Magic, Demonology, Spiritism and Mysticism | 1920 | •• | 
	| 195759 |  | Samuel R. | The carbohydrates and alcohol, (Industrial chemistry ... ed. by Samuel Rideal) | 1920 | •• | 
	| 199709 |  | Ñ F. CLAY | THE THEORY OF THE IMAGINARY IN GEOMETRY | 1920 | •• | 
	| 105653 |  | de la Valle-Poussin C. | Lecons sur l'approximation des fonctions d'une variable reelle | 1919 | •• | 
	| 105698 |  | Planck M. | Einfuehrung in die Mechanik deformierbarer Koerper: zum Gebrauch bei Vortraegen | 1919 | •• | 
	| 106019 |  | Feyer E. | Asymptotische Darstellung gewisser meromorpher Funktionen | 1919 | •• | 
	| 198250 |  | Bayley H. | Archaic England, an essay in deciphering prehistory from megalithic monuments, earthworks, customs, coins, placenames, and faeric superstitions | 1919 | •• | 
	| 129935 |  | Teed P.L. | The Chemistry and Manufacture of Hydrogen | 1919 | •• | 
	| 208875 |  | Ottokar Czernin | Im Weltkriege | 1919 | •• | 
	| 117100 |  | Sommerville D.M.Y. | The elements of non-Euclidean geometry | 1919 | •• | 
	| 119197 |  | Êëåéí Ã. | Ñîëíöå | 1919 | •• | 
	| 32546 |  | Lamb C.G. | Notes on Magnetism | 1919 | •• | 
	| 40210 |  | Bridgman P.W. | A Comparison of Certain Electrical Properties of Ordinary and Uranium Lead | 1919 | •• | 
	| 40287 |  | Webster A.G. | Acoustical Impedance and the Theory of Horns and of the Phonograph | 1919 | •• | 
	| 34444 |  | Cajori F. | Theory of Equations | 1919 | •• | 
	| 40326 |  | Barus C. | An Electrodynamometer Using the Vibration Telescope | 1919 | •• | 
	| 40344 |  | Carmichael R.D. | Conditions Necessary and Sufficient for the Existence of a Stieltjes Integral | 1919 | •• | 
	| 40349 |  | Glenn O.E. | Covariants of Binary Modular Groups | 1919 | •• | 
	| 40390 |  | Van Maanen A. | Evidence of Stream Motion Afforded by the Faint Stars Near the Orion Nebula | 1919 | •• | 
	| 40404 |  | Miller A.G. | Groups Involving Only Two Operators Which are Squares | 1919 | •• | 
	| 40509 |  | Page L. | A Kinematical Interpretation of Electromagnetism | 1919 | •• | 
	| 40511 |  | Abbot C.J. | A New Method of Determining the Solar Constant of Radiation | 1919 | •• | 
	| 40516 |  | Kovarik A.F. | A Statistical Method for Studying the Radiations from Radioactive Substances and the X-Rays and Its Application to some Ray Problems | 1919 | •• | 
	| 40517 |  | King A.S. | A Study of Absorption Spectra with the Electric Furnace | 1919 | •• | 
	| 40518 |  | King A.S. | A Study of the Effect of a Magnetic Field on Electric Furnace Spectra | 1919 | •• | 
	| 40527 |  | Barus C. | An Example of Torsional Viscous Retrogression | 1919 | •• | 
	| 40639 |  | Miller G.A. | Groups Generated by Two Operators, s1, s2, Which Satisfy the Conditions s1m = s2n, (s1s2)k = I, s1s2 = s2s1 | 1919 | •• | 
	| 40644 |  | MacInnes A., Adler L. | Hydrogen Overvoltage | 1919 | •• | 
	| 40653 |  | Loeb J. | Influence of Ions on the Electrification and Rate of Diffusion of Water Through Membranes | 1919 | •• | 
	| 40680 |  | Abbot C.G. | Means of Measuring the Speed of Projectiles in Flight | 1919 | •• | 
	| 40681 |  | Franklin E.C. | Metallic Salts of Pyrrol, Indol  and Carbazol | 1919 | •• | 
	| 40684 |  | Castle W.E. | Model of the Linkage System of Eleven Second Chromosomegenes of Drosophila | 1919 | •• | 
	| 40696 |  | Menzies W.C. | New Measurements of the Vapor Pressure of Mercury | 1919 | •• | 
	| 40710 |  | Barus C. | Note on the Self-Adjusting of Uranyl Salts | 1919 | •• | 
	| 40727 |  | Emch A. | On a Certain Class of Rational Ruled Surfaces | 1919 | •• | 
	| 40732 |  | Rouiller Ch.A. | On Some Metallic Derivatives of Ethyl Thiooglycollate | 1919 | •• | 
	| 40734 |  | Webster A.G. | On the Angle of Repose of Wet Sand | 1919 | •• | 
	| 40741 |  | Perrine C.D. | On the Distribution of the Aphelia of the Secondary Bodies of the Solar System | 1919 | •• | 
	| 40749 |  | Moore R.L. | On the Most General Class L of Frechet in which the Heine-Borel-Lebesgue Theorem Holds True | 1919 | •• |