HENRY SOTHERAN & CO., 140, STRAND, W.C., AND 37, PICCADILLY, W. 251 



4929 TREDGOLD (Thomas, C.E.) ELEMENTARY PRINCIPLES of CARPENTRY: a Treatise on the 

 Pressure and Equilibrium of Beams and Timber Frames, the Resistance of Timber, and the Con- 

 struction of Floors, Roofs, Centres, Bridges, etc., with the Nature and Properties of Timber, and 

 numerous Tables, first edition, with 22 copperplates, 4to. hf. calf gilt (RARE), Us Qd 1820 



'With the exception of Barlow's 'Essay on the Strength of Timber' in 1817, Tredgold's work was the first serious 

 attempt in England to determine practically and scientifically the data of resistance. Before his time engineers relied 

 chiefly on the formulae and results attained by Buflbn and Peter van Musschenbroek in his Physicce Experimentcdes 

 et Geometric^ (v. No. 31(37, ante). Several editions of Tredgold's work have been published, and it remains an authority on 

 the subject.' D. N. B. 



4930 - _ THIRD EDITION, considerably enlarged, with APPENDIX, containing SPECIMENS of various 

 ANCIENT and MODERN ROOFS, by PETER BARLOW, F.R.S., with fine engraved portrait, 50 plates, 

 and woodcuts, 4to. hf. morocco, uncut, t. e. g., 12s 1840 



TELFORD'S COPY: 



4931 PRACTICAL ESSAY on the STRENGTH of CAST IRON, containing Practical Rules, Tables, 



and Examples ; also Account of some NEW EXPERIMENTS, with extensive Tables of the Properties 



of Materials, first edition, with 4 copperplates, 8vo. hf. calf, with auto. * Thos. Telford ' on 



title (rare], 12s Qd 1822 



According to Prof. Todhunter the author was the first to attempt the determination of the position of the neutral line. 



4932 FOURTH EDITION, with Notes by EATON HODGKINSON, F.R.S., and Experimental 



Researches on the Strength and other Properties of Cast Iron, with the Deyelopement of New 

 Principles ; Calculations deduced from them ; and Inquiries applicable to Rigid and Tenacious 

 Bodies generally, by the EDITOR, with 4 plates, and woodcuts, 8vo. hf. cl. (title stamped), 4s 1842 



4933 ANOTHER COPY, hf. morocco (title stamped), 4s Qd 



4934 _ _ ANOTHER COPY, cl. ; with Part II : EXPERIMENTAL RESEARCHES on the STRENGTH and 

 other Properties of CAST IRON, by EATON HODGKINSON, F.R.S., with plates and diagrams, hf. cl. 

 2 vols. 8vo., 8s 1842-6 



4935 _ PRACTICAL TREATISE on RAIL-ROADS and CARRIAGES, shewing the Principles of 

 Estimating their Strength, Proportions, Expense, and Annual Produce, with the Theory, Effect, 

 and Expense of Steam Carriages, Stationary Engines, and GAS MACHINES, 2nd Ed., with Opiates, 

 8vo. hf. cl., uncut (scarce), 12s Qd 1835 



Containing tables on the maximum power of steam of a cubic foot of water, a) in high pressure steam engines ; b) in 

 a condensing steam engine, etc. etc. etc., and giving the result of a number of experiments in connexion with railway 

 engineering. Fig. 26 shows an 8- wheel bogie goods waggon. 



4936 - - PRINCIPLES of WARMING and VENTILATING Public Buildings, etc., and of Constructing 

 Fire-Places, Boilers, Steam Apparatus, Grates, and Drying Rooms, with Remarks on the Nature 

 of Heat and Light, 2nd Ed., improved, with 9 copperplates, and numerous woodcuts, 8vo. hf. calf 

 neat (stamp on title), 5s 1824 



4937 - The STEAM ENGINE : its Invention and Progressive Improvement : an Investigation of its 



Principles, and its APPLICATION to NAVIGATION, MANUFACTURES, and RAILWAYS ; new Ed., 

 enlarged by the Contributions of eminent Scientific Men, and extended to the Science of STEAM 

 NAVAL ARCHITECTURE, revised and edited by W. S. B. WOOLHOUSE, F.R.A.S., with fine steel 

 portraits of the author and James Watt, 125 steel plates (many folding), and numerous woodcuts, 

 2 thick vols. 4to. new hf. buckram, 15s (p. 4. 4s) 1838 



This edition contains an account of experiments to ascertain the ratio of the speed of a steam boat to the power, and, in 

 the appendix, contributions by P. O. BARLOW, ' On the Motion of Steam Vessels ' ; JAMES RENWICK, ' On the Steam Boats 

 of U. S. A. ' ; JOSEPH GLYNN, F.R.S., ' On the Indicator', etc. etc. 



4938 THIRD [LAST] EDITION, greatly enlarged, with 226 steel plates (many folding), and 164 



woodcuts, 3 vols. 4to. in 4, hf. morocco, 1. Is (p. 9. 19s Qd) 1850-3 



This edition is divided into Locomotive Engines, Marine Engines (2 vols.), and Stationary Engines. The locomotives 

 include Sir Daniel Gooch's magnificent Broad Gauge Single ' Iron Duke ', 1848, which with its fellows, after many reboiler. 

 ings, took the fastest expresses on the Great Western Railway till the gauge was taken up in 1892. 



4939 TRENCHANT (Jean) L'ARITHMETIQUE, departie en trois Livres, ensemble un petit discours 

 des Changes, avec TART de CALCULER aux GETONS ; revue et augmentee en ceste derniere edition, 

 tant de plusieurs regies et articles, que d'une Table de poids de XXII Provinces, correspondans 

 1'une a 1'autre ; with folding table, 12mo. old limp vellum (RARE), 18s Lyon, P. Rigaud, 1618 



The author was a follower of Ramus. His work on calculating by counters one of the few works on the subject is of 

 great interest. 



The mode of calculating with counters was a very favourite one with the uneducated classes up to the middle of the 

 XVI. Century. Shakespeare (Winter's Tale, Act IV, Scene 2) makes the young shepherd say : 'I cannot do't without 

 counters.' 



4940 TKOMHOLT (Sophus) Sur les PERIODES de 1'AuRORE BOREALE d'apres des Observations 

 faites a Godthaab en Greenland [in Danish and French], with 2 charts, folio (pp. 60), cl., 3s Qd 



Copenhague, 1882 



4941 TROUESSABT (J.) ESSAI HISTORIQUE sur la THEORIE des CORPS, Simples on Ele'mentaires, 

 et do leurs divers Modes de Combinaisons, depuis I'Origine de la Science jusqu'a Lavoisier, 8vo. 

 sewn, 7s Qd Brest, 1854 



Scarce, and unknown to Lorenz. 



4942 TBOWBRIDGE (William Petit, Yale College) HEAT as a SOURCE of POWER, with Appli- 

 cations of General Principles to the CONSTRUCTION of STEAM GENERATORS : an Introduction to 

 the Study of HEAT-ENGINES, with numerous plates and woodcuts, roy. 8vo. cl., 3s (p. 16s) 



New York, 1874 



4943 [TBUCHOT (Charles)] ETUDE sur la TRANSMISSION ELECTRIQUE de I'ENERGIE ; with wood- 

 cut, roy. 8vo. sewn, Is Qd Clermont-Ferrand, 1891 



4944 TRTJTAT (Eugene) La PHOTOGRAPHIE appliquee k 1'ARCHEOLOGIE ; with photographs and 

 woodcuts, post 8vo. sewn, IsQct 



