HENRY SOTHERAN & CO, 140, STRAND, W.C., AND 43, PICCADILLY, W. 437 



8603 GRAY (Andrew, F.R.S., Univ. Glasgow) ABSOLUTE MEASUREMENTS in ELECTRICITY and 

 MAGNETISM, with 15 woodcuts, 16mo. cl., Is Gd 1884 



8604 SECOND EDITION, greatly enlarged, with 66 woodcuts, 12mo. cl., 2s Qd (p. 5* Qd) 1889 



^605 The THEORY and PRACTICE of ABSOLUTE MEASUREMENTS in ELECTRICITY and 



MAGNETISM, with 303 illustrations, 2 vols. cr. 8vo. in 3, cl., 1. 1* (p. 1. 17s Qd) 1888-93 



8606 VOL. I ONLY, with 105 illustrations, thick cr. 8vo. cl., 6s (p. 12s Qd) 1888 



The standard work on the subject. 



8607 TREATISE on MAGNETISM and ELECTRICITY, Vol. I (all pub.), illustrated, 8vo. cl., 8s 



(p. 14s nett) 1898 



8608 TREATISE on PHYSICS, Vol. I (all pub.) : DYNAMICS and PROPERTIES of MATTER, with 



350 woodcuts, Svo.cl., Is Qd (p. 15s) 1901 



' Providing a treatise which may serve for those who wish to have in one book an account of theoretical and experi- 

 mental physics sufficient for most practical purposes of scientific and technical education.' Preface. It supposes, 

 however, a knowledge of the calculus. 



8609 , and George Ballard MATHEWS, F.R.S. : TREATISE on BESSEL FUNCTIONS, and 



their Applications to Physics, with diagrams, 8vo. cl., 9s (p. 14s nett) 1895 



Including a special chapter on Steady Flow of Electricity or of Heat in Uniform Isotropic Media ; Propagation of 

 Electromagnetic Waves along Wires ; Diffraction of Light ; and at end a Bibliography. 



8610 GRAY (Peter, F.R.A.S.) TABLES for the FORMATION of LOGARITHMS and ANTI-LOGARITHMS to 

 TWELVE PLACES, with explanatory Introduction, 8vo. boards (scarce), Qs 1865 



The author devoted his life to the study of Life-Contingencies as a labour of love, and was a constant contributor to the 

 Journal of the Institute of Actuaries. 



8611 TABLES for the Formation of LOGARITHMS and ANTI-LOGARITHMS to 24 and less Places, 



with Introduction and Historical Preface, roy. 8vo. cl. (scarce), 10s Qd 1876 



An enlargement of the foregoing work. The tables are calculated chiefly on original methods invented by the author. 



8612 GRAY (Thomas) OBSERVATIONS on a GENERAL IRON RAILWAY, or LAND STEAM-CON- 

 VEYANCE ; to supersede the Necessity of Horses in all Public Vehicles ; showing its vast 

 Superiority in every Respect, over all the present PITIFUL METHODS of CONVEYANCE by TURN- 

 PIKE ROADS, CANALS, and Coasting Traders, containing every Species of Information relative to 

 RAIL-ROADS and Loco-MoTiVE ENGINES; 5th Edition, with 5 plates (2 folding), 8vo. hf. cl., 

 uncut (VERY SCARCE), 1. 5s 1825 



8613 ANOTHER COPY, hf. morocco extra, uncut, t. e. g., 1. 7s Qd 



Thomas Gray was a native of Leeds, and as a boy had seen Blenkinsopp's famous locomotive at work on the Middleton 

 cogged railroad. He was one of the first to advocate the building of a 'general iron road,' more especially one between 

 Liverpool and Manchester, but shared the usual fate of prophets in his own country, and died poverty-stricken and 

 broken-hearted in 1848 (D. N. B.). 



The above work however, which first appeared in 1822, may be said to have materially contributed towards familiarising 

 the idea of a general railway system, although his own plan cog wheels on cog rails proved as impracticable as un- 

 necessary. 



The above edition contains some interesting plates of railway carriages, and plans of a ' General Iron Bail-way for 

 Great Britain and Ireland '. 



8614 GREAVES (John, Savilian Prof. Astronomy, Oxon.) MISCELLANEOUS WORKS, many now first 

 published, with LIFE by THOMAS BIRCH, F.R.S. , with copperplates (some folding), 2 vols. 8vo. 

 sound copy in contemporary calf gilt, with fine old bookplate of Sir Robert Abdy, 12s Qd 1737 



8615 ANOTHER COPY, 2 vols. contemporary calf extra, richly tooled, 15s 



Containing the ' Pyramidographia ', the author's best-known work, ' a Discourse of the Roman Foot, and Denarius ', 

 ' Dissertation on the Sacred Cubit of the Jews, trans, from the Latin of Sir Isaac Newton, not yet published,' etc., etc. 

 The author was besides one of the most learned Orientalists of the day and a great Eastern traveller and collector of 

 MSS., all with a view to the study of mathematics. He was Sub- Ward en of Merton and a friend of Abp. Laud, and was 

 accordingly expelled from his office and chair by the Parliamentary visitors in 1648, with the loss of nearly all his library. 



v. ABULFEDA, No. 5627, ante. 



8616 GREAVES (John, Christ's Coll., Cantab.) TREATISE on ELEMENTARY HYDROSTATICS, with, 

 diagrams, cr. 8vo. cl., 2s Qd (p. 5s) Univ. Press, Cambridge, 1902 



8617 TREATISE on ELEMENTARY STATICS, with 133 illustrations, post 8vo. cl., 2s Qd (p. 5s) 1886 



8618 SECOND EDITION, with 129 illustrations, post 8vo. cl, 3s 1888 



8619 GREELY (Major-Gen. Adolphus Washington, U.S. Army) CHRONOLOGICAL LIST of 

 AURORAS, observed from 1870 to 1879, 4to. sewn, with auto, of Prof . A. S. Herschel, F.R.S., 2s Qd 



Washington, 1881 



8620 ISOTHERMAL LINES of the UNITED STATES, 1871-1880, 12 maps, 4to. sewn, with Prof. 



Herschel' s auto., 2s Qd ibidem, 1881 



8621 GREEN, (Alexander Henry, F.R.S., Prof. Geology, Oxon.) GEOLOGY for Students and General 

 Readers, PART I (all pub.) : PHYSICAL GEOLOGY, first edition, with 144 woodcuts, thick large 

 post 8vo. cl., with author's inscr., 5s 1876 



8622 [THIRD AND LAST EDITION, wholly re-written] , with 236 woodcuts, 8vo. cl., 12s (p. 1. Is) 



1882 

 ' Certain branches of the subject were exceptionally well treated.' D. N. B. 



8623 , Robert RUSSELL, C.E., F.G.S., and others: The GEOLOGY of the YORKSHIRE 



COALFIELD, with numerous folding plans and woodcuts, thick roy. 8vo. hf. calf, 12s (p. 2. 2s) 



1878 

 A proof copy, not including the Appendix and Index, and with List of Contents added and mounted. 



8624 GREEN" (Commander Francis Mathews, U.S.N.) REPORT on the TELEGRAPHIC DE- 

 TERMINATION of DIFFERENCES of LONGITUDE in the WEST INDIES and CENTRAL AMERICA, with 

 2 plates (one of zenith telescope added), 4to. sewn, 3s Qd Washington, 1877 



8625 , Rear-Adml. Charles Henry DAVIS, and Lt. J. A. NORRIS, U.S.N. : TELEGRAPHIC 



DETERMINATION of LONGITUDES on the EAST COAST of SOUTH AMERICA, with the Latitude of 

 several Stations, with 3 plates, 4to. sewn, 4s ib. t 1880 



