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



13302 PICKERING (Edward Charles; Director Harvard Coll. Observatory; inventor of the 

 meridian photometer] DIMENSIONS of the FIXED STARS, with especial Reference to Binaries and 

 Variables of the Algol Type, with 2 woodcuts, 8vo. (pp. 37), sewn, Is Qd Cambridge [Mass.], 1880 



13303 ELEMENTS of PHYSICAL MANIPULATION, PART I [Mechanics, Sound and Light] , with 



65 woodcuts, roy. 8vo. cl. (o. p.), 3s Qd (p. 105 60?) 1874 



Including experiments first introduced by the author. 



13304 FOURTH ANNUAL REPORT of the PHOTOGRAPHIC STUDY of STELLAR SPECTRA con- 

 ducted at the HARVARD COLLEGE OBSERVATORY, with photographic plate of spectrum of/3 Aurigte, 

 roy. 4to. (pp. 9), sewn, 2s Cambridge [Mass.], 1890 



13305 VARIABLE STARS of SHORT PERIOD, 8vo. (pp. 28), sewn, Is Qd Boston [Mass.], 1881 



18306 The WEDGE PHOTOMETER, 8vo. (pp. 3), unbound, Is [Cambridge, Mass.], 1882 



J3307 , Arthur SEARLE, and Oliver Clinton WENDELL : OBSERVATIONS with the 



MERIDIAN PHOTOMETER, 1879-82, roy. 4to. (pp. 186), sewn (o. p.), 7s Qd ibidem, 1885 



Containing interesting chapters on 'Ancient Catalogues', 'Catalogues of Sir William and Sir John Herschel ', and 

 ' : Modern Catalogues ' (pp. 48), ' Discordant Observations ', ' Suspected Variables ', and ' Errors of Catalogues \ It forms 

 a supplement to the author's Photometric Catalogue, published in 1884. 



13308 PHOTOMETRIC MEASUREMENTS of the VARIABLE STARS (3 PERSEI and 



DM. 81 25, made at the Harvard College Observatory, 8vo. (pp. 37), sewn, Is Qd ibidem, 1881 



13309 PICKERING (Percival Spencer Umfreville ; F.R.S. ; Director Woburn Experimental Fruit 

 Farm) On DELICATE CALORIMETRIC THERMOMETERS, 8vo. (pp. 13), sewn, Is Qd 1886 



13310 The DENSITY of SULPHURIC-ACID SOLUTIONS, 8vo. (pp. 13), sewn, Is Qd 1892 



13311 EXPERIMENTAL ERROR in CALORIMETRIC WORK, 8vo. (pp. 7), sewn, Is Qd 1886 



13312 On the NATURE of SOLUTION, 8vo. (pp. 8), sewn, Is Qd 1886 



13313 The RECOGNITION of CHANGES of CURVATURE by Means of a FLEXIBLE LATH, 8vo. 



(pp. 31), sewn, 2s 1892 



13314 PICKERING (William Henry, Harvard Observatory ; discoverer of Phcebe and Themis) The 



MOON : a Summary of the existing Knowledge of our Satellite, with a COMPLETE PHOTOGRAPHIC 



ATLAS, with 110 plates, chiefly from photographs, and 8 diagrams, sm. atlas 4to. cl., 1. 10* 



(p. 2. 2s nett) New York, 1903 



1 Giving an account of some of the more recent advances in our knowledge of the Moon, leaving to the text-books a 



statement of the information that was earlier acquired.' Preface. The photographs were made with a 12" refractor at the 



Arequipa station of Harvard Observatory under ideal atmospheric conditions. 



13315 INVESTIGATIONS in ASTRONOMICAL PHOTOGRAPHY, with 1 plates, 4to. sewn, 3s Qd 



Cambridge, Mass., 1895 



13316 PICTET (Lieut.-Col. Adolphe) ESSAI sur les PROPRIETES et la TACTIQUE des FUSEES de 

 GUERRE, 8vo. hf. calf, 3s Turin, 1848 



13317 PICTET (Marc Auguste; F.R.S.) ESSAY on FlRE, translated under the Inspection of the 

 Author, by W. B., M.D., with folding frontispiece and table, 12mo. hf. calf (front, browned) ; RARE, 

 12s Qd 1791 



' In consequence of this delay [in printing] I have been anticipated in the suggestion of some of the general ideas con- 

 tained in the first chapter by Mr. Lavoisier in his Elementary Treatise of Chemistry. . . . Certain paragraphs of my work 

 resemble almost word for word those of that celebrated chemist.' Preface. 



The author gave in the above work an explanation of the formation of dew, by which he was able to explain a dew- 

 maximum on clear nights. His theory was completed in 1814 by Dr. W. C. Wells, F.R.S. (;. Nos. 5322-5 ante}. 



13318 NOTICE sur DEUX FONTS SUSPENDUS, en FIL de FER, recemment etablis sur les Fosses 



d'Enceinte de la Ville de Geneve ; with folding plate of suspension bridge, 8vo. (pp. 20), unbound, 

 3s Qd [Geneve, 1823] 



13319 PICTET (Raoul) Le CARBITE : nouveaux Precedes pour sa Fabrication ; with illustration, 

 8vo. (pp. 74), sewn, 2s Gen toe, 1896 



A simplified process for producing carbide of calcium. 



13320 PIDDINGTON (Henry, President of Marine Courts, Calcutta) The SAILOR'S HORN-BoOKfor 

 the LAW of STORMS : a Practical Exposition of the Theory of the Law of Storms, and its Uses to 

 Mariners of all Classes in all Parts of the World, shewn by Transparent Storm Cards and Useful 

 Lessons, fifth Edition, enlarged and improved, with folding charts (2 transparent ones in pocket), 

 large post 8vo. cl., Qs 1869 



Containing the discovery of the law of storms (together with Sir William Reid, q. v. post). The author also originated 

 in this work the word ' cyclone '. 



13321 PIDOUX (Justin; Geneva Observatory) MEMOIRS sur la LATITUDE de FOBSERVATOIRE de 

 GENEVE, 4to. (pp. 68), sewn, 2s Geneve, 1900 



13322 PIERCE (George Washington; Harvard Univ.) CRYSTAL RECTIFIERS for ELECTRIC 

 CURRENTS and ELECTRIC OSCILLATIONS, II. CARBORUNDUM, MOLYBDENITE, ANATASE, 

 BROOKTTE, with plate and 12 illustrations, roy. 8vo. (pp. 33), sewn, 2? [Baltimore'], 1909 



13323 EXPERIMENTS on the ELECTRICAL OSCILLATIONS of a HERTZ RECTILINEAR OSCILLATOR, 

 with 4 illustrations, roy. 8vo. (pp. 11), sewn, \s Qd [ibidem], 1910 



13324 THEORY of COUPLED CIRCUITS, under the Action of an Impressed Electromotive Force, 



with Applications to RADIOTELEGRAPHY, 11 diagrams, roy. 8vo. (pp. 32), sewn, Is Qd [ib.~], 1911 



1332-5 PIERCE (George Winslowj The LIFE-ROMANCE of an ALGEBRAIST, with portrait, plate, and 

 fss., oblong 16mo. cl., 4s Boston [Mass., 1891] 



A curious medley of mathematics, autobiography, and poetry. 



13326 PILLA (Leopoldo; Univ. Pisa) CONOSCENZE di MINERALOGIA necessarie per lo Studio di 

 Geologia ; withholding plate, 8vo. (pp. 72), sewn, 2s Qd Napoli, 1841 



1332.7 PILLA (Niccola) II GALVANISMO, nel suo Rapporto colla RIPRODUZIONE ANIMALE, owero 

 TEORIA della G^NERAZIONE, Svo. sewn (rare), Is Qd Napoli, 1817 



This work is not mentioned by Poggenc orff and other bibliographers, nor contained in the otherwise complete list of 

 'books on electricity in the Catalogue of the Ronalds Library. 



