622 HENRY SOTHERAN & CO.. 140, STRAND, W.C., and 43, PICCADILLY, VV. 



10i66 LANDAU (Edmund ; Univ. Gottingen) \J her die Bedeutung einiger neuen Grenzwert- 

 SATZE der Herren Hardy imd AXER, impl. 8vo. (pp. 81), sewn, Ss Wartzawa, 19 lO 



10467 Ein Satz iiber die ^FuNKTiON, roy. Svo. (pp. 7), sewn, Is Kobenhavn, 1911 



1046S LANDOLT (Hans Heinrich ; Univ. Berlin) Handbook of the Polariscope, and its 



Practical Applications, adapted by D. C. Robb and V. H. Veley, with Appendix by I. Steiner, 



57 luoodcuts, Svo. cL, uncut (scarce), £1. Is ' 1882 



Inclu'liiig the author's important investigations on the refractive index of chemical couipoutids, and more especially on 



the relation between the constitution of a chemical substance and its light-refracting povvnr. 



10469 Untersuchungen liber etwaige Anderungen des Gesammtgewichtes chemisch 



sich umsetzender Korper, I.-IIL Mittheilung, impl. Svo. (pp. 101), sewn, 4s 6d 



IBerlin], 1893-1906-8 



10470 , und Richard BORNSTEIN, Berlin: Physikalisch-Chemische Tabellen, 4to. cl.. 



5s (p. M. 12) ibidem, 1883 



Original edition. 



10471 Dritte umgearbeitete und vermehrte Auflage, von Richard Borxstein und 



WiLHELM Meyerhoffer, sq. impl. 8vo. original moleskin, £1. (p. M. 36) ihidem, 1905 



The most extensive collection of physical and chemical tables, formulas, and constants yet published. 



10472 LANDKIANI (Marsiglio Conte) Opuscoli Fisico-Chimici ; with folding copperplate and 

 engru'jed vignettes, Svo. sewn, \Qs Qd ' Milano, 1781 



10473 Another Copy, fonfemmrarii calf qilt (hack somewhat wormed), 12.s 



Containing ' Descrizione del Chronbyometro, ossia di una Nuova Macchina Meteorologica, colla quale si misura ladurata 

 della Pioggia ' (pp, 65) ; ' Dissertazione del Cah^r I.atente ' (pp. fiO), etc 



10474 DlsSERTAZCONEdeir UTiLlTAdeiCONDUTTORI Elettrici; ivith folding copperplate and 



fine vignette on title, 8vo. sewn, uncut, with author'' s inscr. onfli/leaf, \0s ib., 1784 



' Landiiani drew attention to the paramount importance of a perfect earth connexion.'— i2. Anderson. 



10475 Description d'une Machine propre h, elever I'Eau par la Rotation d'une Corde 



Verticale, Svo. (pp. 15), sewn {? plate missing), 3? Qd Gen^oe, 1782 



10476 LANE (Timothy, f.r.s.), Description, with a Representation, of an Electrometer 

 invented by ; and Account of some Experiments made by him with it; in a Letter to Benjamin 

 Franklin, f.r.s., with copperplate, Svo. (pp. 4), unbound, 6-9 17b9 



An account of the author's invention by which a modified Leyden Jar is made into an electrometer. The author — like 

 many other noteworthy scientist s— is not included in D. N. B. 



10477 LANG (Viktor v.) Bestimmung des Brechungsquotienten einer concentrirten Cyanin- 

 losung, roy. Svo. (pp. 21), sewn. Is Qd [Wien, 1881] 



The author was the founder of modern physical crystallography. 



10478 LANG (William Robert, Univ. Toronto), et A. RIGATTT : Sur la Dissociation dii 

 Chlorure de Cadmium Hexammoniacal, 4to. (pp. 3), seivn, is 6d [1899] 



10479 LANGDON (Roger; station master at Silverton, G.W.R., and amateur astronomer)^ The 

 Life of, told by Himself, with Additions by his Daughter Ellen [and Preface by H. Clifton 

 Lambert], cr. Svo. c/., 2* ' ' [1908] 



10480 LANGJ30N (William Edward, m.i e.e.) The Application of Electricity to Rail\vay 

 Working, with Opiates and 142 other illustrations, Svo. cl. (o. p.), As 6rf (p. 10* 60^) 1897 



10481 LANGE (Ludwig) Die geschichtliche Entwickelung des Bewegungsbegriffes undihr 

 voraussichtliches Endergebniss, roy. Svo. buckram, 2s Qd Leipzig. 18S6 



10482 LANGILLE (H. D.), F. G. PLTJMMER, Arthur DODWELL, Theodore F. RIXON, 

 and John B. LEIBERG : Forest Conditions in the Cascade Range Forest Reserve, 

 Oregon, with Introduction by Henry Gannett, with 4 large coloured maps, and 37 plates and 

 diagrams (some coloured), 4to. sewn, 6s 6c? U.S. Geological Survey, Washington, 1903 



10483 iiANGLEY (Edward M.) Treatise on Computation : the chief Methods for Contracting 

 and Abbreviating Arithmetical Calculations, 12rao. cl., 2s 1895 



10484 LANGLEY (Samuel Pierpont ; Smithsonian Inst., F. U.S.) Researches on Solar Heat and 

 its Absorption by the Earth's Atmosphere : a Report of the Mount Whitney Expedition, with 

 22 plates {some folding), 20 diagrams, and map, large 4to. cl., 12s Washington, 1884 



10485 Another Copy, cl., with interesting auto, letter from the author to Edward 



Whympsr, 14s 



'Atmospheric absorption [of solar heat] had never before been studied with such precision as it was by Langley on 

 Mount Whitney. Aided by simultaneous observations from Lone Pine, at the foot of the Sierra, he was able to calculate 

 the intensity belonging to each ray before entering the earth's gaseous envelope— in other words, to construct an extra- 

 atmospheric curve of energy in the spectrum.'— Miss Agnes M. Gierke. The author invented the bolometer, which he 

 largely used in the investigations described in the above work. 



10486 LANG MAID (J., r.n.), and H. GAISFORD r.n. ; Elementary Lessons in Steam 

 Machinery and the Marine Steam Engine, with the Construction of a Battleship ; en- 

 larged Edition, ivith %2 plates, Svo. cl., 3s (p. 6s nett) 1893 



10487 LANGMUIR (A. C.) Index to the Literature of Didymium, 1842-1893, roy. Svo. (pp. 20), 

 sewn. Is Washington, 1894 



10488 LANGSDOBF (Karl Christian v.; Univ. Heidelberg) Lehrbuch der Hydraulik, mit 

 bestandiger RUcksicht auf die Erfahrung ; with 51 folding copperplates^ thick 4to. old hf. calf, 

 6s 6c? Altenburg, 1794 



Interesting for the extensive mathematical treatment of the subject. The chapter 'iiber die Construction des 

 hydrometrischen Flligels ' is by Reinhard Woltmann. 



10489 Versuch einer neuen Theorie hydrodynamischer und pyrometrischer Grund- 



lehren und deren Anwendung auf die Aniage neuer Rohrenleitungen, Pumpenklinste, 

 Wassersjiulen und Dampf-Maschinen ; with \ folding copperplates, Svo. old calf gilt (nice copy), 

 rare, 10s Qd ' Frankfurt, 1787 



An original treatment of the subject and largely mathe-natical. Pp. 204-94 contains the author's theory of the steam- 

 engine. 



