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



13576 [POWELL (Thomas)] Humane Industry : or a History of most Manual Arts, deducing 

 the Original, Progress, and Improvement of them ; furnished with Variety of Instances and 

 Examples, shewing forth the Excellency of Human Wit, 12mo. very sound copy in old mottled calf 

 t^RARE), £1. Is H. Herringman^ 1661 



Containing many other interesting subjects: The Invention of Dials, Clocks, Watches, etc. (pp. 1-13): Of some curious 

 iSplieres and Representations of the World (pp. 14-23): Of sundry Machines and Artificial Motions, by Water and Air 

 (pp. -24-45): Of the Art of Spinning and Weaving (pp. 84-101) : Of the Invention of Glass (pp. 133-43) : Of the Invention of 

 Shipping and Sayling : also of the Mariner's Compass (pp. 144-03). 



13577 POWELL (Lt.-Col. William H., U.S. ^rm?/) The Army Officer's Examiner: containing 

 Questions and Answers on all Subjects prescribed for an Officer's Examination ; with Rules to 

 guide Boards of Examination, cr. 8vo. cl.y -is (p. 17* nett) New York, 1894 



13578 POWER (Henry, m.d., f.r.s.) Experimental Philosophy: containing New Experiments, 

 MiCROSCOWCAL, Mercurial, and Magnetioal, with some Deductions and Probable Hypo- 

 ffcheses, raised from them, in Avouchment and Illustration of the now famous Atomical 

 Hypothesis, with folding copperplate {mounted on canvas), and 2 woodcuts, sm. 4to. old calf gilt 

 {newly and neatly rebacked) ; RARE, £1. \s T. Roycroft, 1664 



The author's only published work. 



' The following observations seem to make out, that the Minute particles of most (if not all) Bodies are constantly in 

 some kind of motion, and that motion may be both invisibly and unintelligibly slow, as well as swift, and probably is as 

 unseparable an attribute to Bodies, as well as Extension is.'—Prcfo.ce. 



The second and third books have a separate title, which is dated 1603. At end is : Subterraneous Experiments : or, 

 Observations about Coal-Mines. There is an interesting ' Conclusion ', containing reflexions on contemporary learning. 



13579 POWER (James, Paris) Compagnie des SiGNAUX Electriques : Systeme Tyer, roy. Svo. 

 (pp. 22), sewn {rare). Is Qd 1855 



Advocating the use of electric signals as a means of preventing the frightfully common railway disasters of the days 

 before the Block System. The author compares the systems of Bonelli and Tyer, deciding in favour of the automatic 

 signalling of the latter. 



13580 POYNTINQ (John Henry, f.r.s. ; Prof. Physics, Univ. Birmingham) Change of State : 

 Solid-Liquid, with plate, 8vo. (pp. 17), sewn, with author's inscr., 2s (id 1881 



13581 On a Determination of the Mean Density of the Earth and the Gravitation 



Constant by Means of the Common Balance, with 7 plates and 14 vjoodcuts, roy. 4to. (pp. 92), 

 sewn, with author's inscr., 4s 6d 1892 



The llrst experiment for measuring the earth's density in which the common balance was used. Hitherto, since 

 Cavendish's experiment, the torsion balance had always been used. 



13582 The Mean Density of the Earth, with 7 folding charts and 17 illustrations, Svo. d., 



6s 6d (p. 12* 6c?) 1894 



This essay, which was awarded the Adams Prize in 1893, ' gives an account of the various experiments, including one 

 by the author, which have been made to determine the mean density of the earth. ' It includes a valuable Bibliography. 



13583 Note on a Method of determining Specific Heat by Mixture, with 4 diagrams, 8vo. 



(pp. 8), sewn. Is 6d Birmingham [1884] 



13584 On a Simple Form of Saccharimeter, 8vo. (pp. 4), sevjn. Is 6d 1880 



13585 On the Transfer of Energy in the Electromagnetic Field, with 6 diagrams, roy. 



4to. (pp. 19), sewn, with author's inscr., Ss 6d 1884 



An important memoir, in which the author ' from Maxwell's equations drew the conclusion that in all cases where 



energy is transferred in an electric system it flows parallel to the surfaces of both electric and magnetic equipotentials.' 



— Prof. Silvanus Thompson, F.R.S. 



13586 , and Sir Joseph Jolin THOMSON, f.r.s. : Text-Book of Physics [Vol. I] : Pro- 

 perties of Matter, with 168 illustrations, sq. 8vo. cl., 5s 6d (p. 105 (id) 1902 



13587 [Vol. II] : SOUND, with 85 illustrations, sq. 8vo. cl., 4s (p. Ss 6d) 1899 



1.3588 Fifth [Last] Edition, carefully revised, with 85 illustrations, sq. 8vo. cl., 4$ 6d 



<p. 8s 6d) 1909 



i:^589 [Vol. Ill] : Heat, with 193 illustrations, sq. Svo. cL, Is 6d (p. 15*) 1904 



A text-book of well-known excellence, ' intended chiefly for the use of students who lay most stress on the experi- 

 mental part of physics, and who have not yet reached the stage at which the reading of advanced treatises on special 

 subjects is desirable.' — Preface. Parts I and II of the fourth volume (Electricity and Magnetism) were published in 

 February 1914 at 10s 6d. Vol. V, containing Light, has not yet been issued. 



13590 POZZO (Andrea, s.j.) Rules and Examples of Perspective proper for Painters and Archi- 

 tects, etc., in English and Latin, containing a most easie and expeditious Method to delineate in 

 Perspective all Designs relating to Architecture, after a New Manner, wholly free from the 

 Confusion of Occult Lines, done into English by John James, of Greenwich, icith 105 fne copper- 

 plates, and 200 pretty vignettes on copper, all engraved by JOHN Sturt, roy. folio, old tree-calf, 

 slightly waterstained, a few II. neatly repaired, andjoints cracked, otherwise a sound copy),£l. 5s 1707 



13591 Another Copy, old calf (binding neatly mended and newly rebacked), £1. Is %d 



Not only celebrated as a treatise of perspective, but of great interest for illustrating the author's own style of architect- 

 ure, one of the best examples of the decadent Renaissance or Baroque style. 



' C'est la qu'on voit porter au dernier point ce qu'on pourrait appeler la caricature de la hizarrerie. C'est une congeries 

 <\e piedestaux sur piedestaux, de colonnes portees sur des consoles, de formes en ondulations, de frontons ecrases, de 

 figures baroques, de colonnes torses transfonnees en serpents, de colonnes supposees assises, etc.'-— Quatrcnicre de Quiney. 



John James the translator was clerk of the works to Greenwich Hospital, and held the high office of Surveyor to St. 

 Paul's Cathedral and to Westminster Abbey ; he supervised the fifty new Churches built in the Greater London of Queen 

 Anne's day, the first of the only two occasions on which the post-Reformation Church of England received a State subsidy; 

 and he designed St. George's, Hanover Square and Orleans House, Twickenham. 



13592 PRACTICAL MECHANIC (The), and Engineer's Magazine, from the Beginning in 

 October, 1841 to September, 1845 (Vols. 1-4), with numerous plates and woodcuts, 4 vols. 4to. cl., 

 IQs Glasgow, 1842-5 



13593 PBJESCOTT (George Bartlett) The Speaking Telephone, Electric Light, and other 

 recent Electrical Inventions, with foldinq front. andZ2\ woodcuts, 8vo. cl. io.p.), 4* (p. 12s 6c?) 



New York, \%n 

 Valuable for giving a very complete history (pp. 1-274) of telephony, from Philipp Reiss to its date of publication. 



