280 
Physik. 
4309 Hawkins, C. C., and Wallis, F., The Dynamo; its theory, design and rnanu- 
facture. London 1893. 8 . 520 pg. w. 190 illustrations. cloth. Mark 11 
4310 Helrnholtz, H. V., On atmospheric Movements (from. Abbe, Mechanics of the 
Earth’s Atmosphere). Washington 1891. 8 . 34 pg. 
4311 — On the Integrals of the hydrodynamic Equations that represent Vortex Motions 
(from: Abbe, Mechanics of the Earth’s Atmosphere). Washington 1S91. 8 . 27 pg. 
4312 — The Energy of the Billows and the Wind (from: Abbe, Mechanics of the 
Earth’s Atmosphere). Washington 1891. 8 . 18 pg. 
4313 — On the theorem relative to Movements that are geometrically similar in lluid 
Bodies, together with an application to the problem of steering Ballons (from: 
Abbe, Mechanics of the Earth’s Atmosphere). Washington 1891. 8 . 11 pg. 
4314 — On discontinuous Motions in Liquids (from: Abbe, Mechanics of the Earth’s 
Atmosphere). Washington 1891. 8 . 9 pg. 
4315 Hering, C., Report on the Electricity at the Paris Exposition 1889. Washington 
1893. 8 . 247 pg. w. figures. 
4316 Hertz, H., Graphic method of determining the adiabetic Changes in the condition 
of moist Air (from: Abbe, Mechanics of the Earth’s Atmosphere). Washington 
1891. 8 . 14 pg. w. 1 plate. 
4317 Hirn. — Faudel et Schwoerer, E., G. A. Hirn. Sa vie, sa famille, ses travaux. 
Paris 1893. 8 . avec 1 portrait, 1 autographe (de Hirn) et 3 planches. 4ao 
4318 Jhering, A. V., Die Gebläse. Bau u. Berechnung der Maschinen zur Bewegung, 
Verdichtung u. Verdünnung der Luft. Berlin 1893. gr. 8 . 11 u. 708 pg. m. 3 Tafeln 
u. 464 Abbildungen. Leinenband. 20 
4319 Kennedy, A. B. W., The Mechanics of Machinery. London 1893. 8 . 652 pg. w. 
numerous illustrations. cloth. 9r>o 
4320 Kilgour, M. H., Swan, H., and Biggs, C. H. W., Electrica! Distribution; its theory 
and practice. London 1893. 8 . 426 pg. w. illustrations. cloth. 11 
4321 Kirchhoff, G., The Theory of free liquid Jets (from: Abbe, Mechanics of the 
Earth’s Atmosphere). Washington 1891. 8 . 9 pg. 
4322 Kurth, 0., Beitrag zur Erklärung der Farben von Krystallplatten im polarisirten 
Licht. Theil II. .lauer 1893. 4. 1 4 pg. 1 
Tlieil I. 1892. 15 pg. in. I Tafel. M. 1,20. 
4 323 Margules, M., On the Vibration of an Atmosphere periodically heated (from: Abbe, 
Mechanics of the Earth’s Atmosphere). Washington 1891. 8 . 23 pg. 
4324 Michelson, A. A., Oll the application of lnterference Methods to spectroscopic 
Measurements. Washington (Smiths. Contrib. to Knowl.) 1892. 4. 24 pg. w. 
5 plates. 4 
4325 Minel, P., Introduction ä l’Electricite industrielle. 2 volumes. (I: Potentiel, Ilux 
de force, grandeurs eiectriques. 11: Circuit magnetique, induction, machines.) 
Paris 1893. 8 . 227 et 176 pg. av. 67 figures. Chaque volume 220 
4326 Oberheck, A., On the phenomena of Motion in the Atmosphere (from: Abbe, 
Mechanics of the Earth’s Atmosphere). Washington 1891. 8 . 22 pg. 
4327 — The Movements of the Atmosphere on the Earth’s surfaee (from: Abbe, 
Mechanics of the Earth’s Atmosphere). Washington 1891. 8 . 20 pg. 
4328 — Discontinuous Motion in Liquids (from : A b b e , Mechanics of the Earth’s 
Atmosphere). Washington 1891. 8 . 12 pg. 
4329 — On the Guldberg-Mohn Theory of horizontal Atmosphere Currents (from : 
Abbe, Mechanics of the Earth’s Atmosphere). Washington 1891. S. 5 pg. 
4330 Paulsen, A., Naturkraefterne, deres Love og vigtigste Anvendelser. 2 ., omarbej- 
dede og forügede udgave. Kjdbenhavn 1893. 8 . m. Tafeln u. Abbildungen. — 
Lieferung 14 u. 15: pg. 833—960. Jede Liefg. I 20 
4331 Pellat, H., Cours de Physiquc. 2 . edition. entierement refondue. 2 volumes. 
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4332 Poincare, H., Theorie des Tourbillons. Leyons professees pendant le 2 . semestre 
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national Meteorological and the international Hydrological and Climatological 
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