HENRY SOTHERAN & CO., 140, STRAND, W.C., AND 43, PICCADILLY, W. 68* 



13595 PRAT (Louis) NOUVEAU PROCEDE de TIRAGE MECANIQUE des FOYERS, par Aspiration k 

 Travail Constant ; with 6 illustrations, roy. 8vo. (pp. 20), sewn, 2s 6d 1898- 



13596 PRATICA: cioe NuovA INVENTIONS di Conteggiare, ridotta a^MoDO tan to FACILE, che 

 ognuno potra far ogni gran Conto, si in yendere, come in comprare, sia a Misura, 6 Peso, 6 in 

 qualsivoglia altro Modo ad ogni Sorte di Prezzo, e Moneta per tutte le^Parte del Hondo, ecc..: 

 AGGIONTA di due TAVOLE utilissime alia Pratica, 6 Nuova Inventione di Conteggiare, nelle qualii 

 si ha il Maneggio de' Soldi, e Dinari in varie Sorti di Conti 2 vols. 32mo. in 1, old vellum (first 

 title soiled, otherwise a sound copy), 2. 2s Milano, Giose/o Marelli, s. a. 



A very rare edition, unknown to Riccardi. The second volume is not mentioned by him at all. All thpse oM 

 multiplication tables have now become very rare, nearly all having been destroyed by constant thumbing. 



13597 PRATT (John Henry, Fellow of Cairn ; F.R.S. ; Archdn. of Calcutta) The MATHEMATICAL 

 PRINCIPLES of MECHANICAL PHILOSOPHY, and their Application to the THEORY of UNIVERSAL 

 GRAVITATION, with 5 folding plates, 8vo. cl., 4s Cambridge, 1836 



This work was largely made use of by Prof. Todhunter in his ' Analytical Statics.' 



13598 SECOND [LAST] EDITION, revised and improved, with 5 folding plates, thick 8vo. calf, 6# 



(p. 1. Is) ibidem, 1841 



13599 REPRINT, 8vo. hf. cl., 6s ibidem, Macmillan, Barclay, and Macmillan, 1845 



This verbatim reprint of the second edition was one of the first books issued by Daniel Macmillan, after he began 



publishing at Cambridge. 



13600 ANOTHER COPY ; also, Carmichael (Robert, pr., M.R.I.A.) TREATISE on the CALCULUS 



of OPERATIONS, to facilitate the Processes of the Differential and Integral Calculus and the 

 Calculus of Finite Differences, with diagrams 2 vols. 8vo. in 1, hf. calf, 14s 1845-55 



Carmichael's work 'contains some interesting theorems respecting attraction.'' Prof. Todhwnter. 



13601 ANOTHER COPY of the first work; with : Gregory (Duncan Farquharson ; first editor of 



the * Cambridge Mathematical Journal ') EXAMPLES of the PROCESS of the DIFFERENTIAL and 

 INTEGRAL CALCULUS, 2nd [last] Edition, by WILLIAM WALTON, with 4 folding plates ? vols. 

 8vo. in 1, hf. roan (poor copies), 7s 6rf 1845-6 



1 Gregory's is a work which produced a great change for the better in the Cambridge mathematical books. It is the- 

 first in which constant use is made of the method known by tie name of the separation of the symbols of operation, and 

 the author has enlivened its pages bv occasionally introducing historical notices of the problems discussed.' D.N. B. 



13602 TREATISE on ATTRACTIONS, LAPLACE'S FUNCTIONS, and the FIGURE of the EARTH, 



4th [last] Edition, with diagrams, post 8vo. cl. (scarce], 10s 6c? 1871 



LAST EDITION, and now out of print and SCARCE. 



' The distinction between the coefficients and functions of Laplace is given for the first time to my knowledge in Pratt'.s 

 ' Figure of the Earth '.'Prof. Todhunter. 



Archdeacon Pratt was second son of JOSIAH PRATT, pr., one of the founders of the Church Missionary Society. He 

 was Third Wrangler in 1833, and went to India as Bp. Daniel Wilson's chaplain, and worked there, highly esteemed by 

 Bp. Milman, till his death in 1871. 



13603 PRATT (Mason D.), and C. A. ALDEN: STREET-RAILWAY ROADBED, with 157 illustra- 

 tions, roy. 8vo. cl., 5s (p. 8s Qd nett) New York, 1898- 



13604 PRATT (N. A., M.D., Oglethorpe Univ., Ga.) ASHLEY RIVER PHOSPHATES : History of the Marls 

 of South Carolina, and of the Discovery and Development of the NATIVE BONE PHOSPHATES of the 



CHARLESTON BASIN, etc. etc., roy. 8vo. (pp. 42), sewn, with author's inscr., 2s 6d Philadelphia, 1868; 



13605 PRAY, Jr. (Thomas) TWENTY YEARS with the INDICATOR : a Practical Text-Book r with no- 

 complex Formulae ; with the Author's Original and Correct Application of the Theoretical Curve, 

 to show exactly where the Steam Valve closed and whether valves leak or not, etc. etc., with 

 many Tables and Hints, newly arranged, with 189 illustrations, large roy. 8vo. cl., 6s 6d(p. 16s) 



New York, 1896 



13606 PREBLE (Rear-Adml. George Henry, U.S.N.) CHRONOLOGICAL HISTORY of the ORIGIN and 

 DEVELOPMENT of STEAM NAVIGATION, 1543-1882, large 8vo. cl., 9s (p. 18s) Philadelphia, 1883 



' This volume is believed to contain more facts relating to the progress of steam navigation over the world than have 

 ever been gathered together in one book.' Preface. Pp. 414-21 contain a bibliography. 



13607 PREDIGER (C.) Ueber die GENAUIGKEIT BAROMETRISCHER HOHENMESSUNGEN, impl. 8vo. 

 (pp. 40), sewn, 2s Clausthal, 1860> 



13608 PREECE (Sir William Henry, F.R.S. ; G.P.O. ; inventor, on the Flat Holm, of wireless tele- 

 graphy] LECTURES on a SYSTEM of TELEGRAPHY as applied to RAILWAY PURPOSES,, folio 

 '(pp. 33), hf. calf, 5s [1874] 



Bound up with the above is : London and South Western Ry. Special Instructions to Signalmen and all others con- 

 cerned for the Electric Train Signalling from Station to Station on Double and Single Lines of Railway (pp. 16), with, 

 map ('73). 



13609 On the MAINTENANCE and DURABILITY of SUBMARINE CABLES in SHALLOW WATERS, 



with Abstract of the Discussion at Inst. C.E., edited by CHARLES MANBY, F.R.S., and JAMES 

 FORREST, A.I.C.E., with folding plate, 8vo. (pp. 82), sewn. 3s Gd 1862 



13610 PRESIDENTIAL ADDRESS to the INSTITUTION of CIVIL ENGINEERS, 8vo. sewn, ls$d 1898 



13611 WATT and the MEASUREMENT of POWER, with 2 illustrations, 8vo. (pp. 13), seivn, with 



author's inscr., Is Qd 1897 



13612 - , and Julius MAIER : The TELEPHONE, with photographic front., plate, and 290 wood- 

 cuts, thick cr. 8vo. cl. (o.p.}, 4s (p. 12s 6d) 1889 



13613 , and Sir James SIVEWRIGHT, G.P.O. : TELEGRAPHY, first edition, with 161 wood- 

 cuts, post 8vo. cl., 2s 1876 



13614 NINTH EDITION, enlarged, with 255 woodcuts, post 8vo. cl., 2s Qd 1891 



13615 NEW EDITION, greatly enlarged, with 267 woodcuts, post 8vo. cl., 3s 6d (p. 7s Qd) 1901 



' An excellent manual'. Prof. Silranus Thompson. 



13616 , and Arthur J. STUBBS, G.P.O. : MANUAL of TELEPHONY, with S33 woodcuts, thick 



cr. 8vo. cl. (o.p.), 6s Qd (p. 15s) 1893 



A new edition of Preece and Maier's ' Telephone '. 



