HENRY SOTHEKAN & CO., 140, STRAND, W.C, and 43, PICCADILLY, W. 497 



9919 JOULE (James Prescott, f.r.s.) Scientific Papers, published by the Physical Society of 

 London, with fine portrait by Jeens, plates, and ivoodctits, 2 vols. 8vo. cL, £1. 2* 6d (p. £1. 125 

 nett) Physical Soc, 1884-7 



Including the author's important papers on thermo-electricity, and his propounding the law of the conservation of energy 

 through his determination of the mechanical equivalent of heat. His name is well-known in electrical science as the unit 

 of thermo-electricity, and by Joule's Law, giving the algebraic formula for determining it. 



9920 On the AiR ENGINE, roy. 4to. (pp. 16), sewn {plate ivanting), 45 6^ 1851 



This paper contains Joule's invention of a fuel-saving hot-air engine which allows of greater ranges of temperature 



than are obtainable in the steam engine. It includes an additional note (pp. 3) by Lord Kelvin : ' Synthetical 

 Investigation of the Duty of a Perfect Thermo-Dynamic Engine founded on the Expansions and Condensations of a 

 Fluid,' etc. etc. 



9921 On the CHANGES of Temperature produced by the Rarefaction and Condensation 



of Air, with 6 woodcuts, 8vo. (pp. 15), sewn, 6* Qs 1845 



' Describing a determination made by observing the heat produced by compressing air and the energy requisite for the 

 compression ; the result was 7i»S foot lbs. In this paper he obtained the important result necessary to justify his 

 procedure that ' no change of temperature occurs when air is alloAved to expand in such a way as not to develop 

 mechanical power'.' — R. T. Glazebrook, F.R.S. 



' Containing the tirst definite development of the dynamical theory of matter and heat.'— Pro/, Osborne Reynolds, F.R.S. 



9922 On the Existence of an Equivalent Relation between Heat and the Ordinary 



Forms of Mechanical Power, 8vo. (pp. 3), unbound, 2s 6d 1845 



9923 On the Heat absorbed in Chemical Decompositions (2 Letters to the ' Philosophical 



Magazine ' ), 8vo. (pp. 4), unbound, \s Qd 1856 



9924 On the MECHANICAL EQUIVALENT of Heat, as determined by the Heat evolved by the 



Friction of Fluids, 8vo. (pp. 4), unbound, 45 6rf [1847] 



The original form of this important memoir, afterwards enlarged in the one described below. 



9925 On the MECHANICAL EQUIVALENT of Heat, with plate, 4to. (pp. 22), sewn (VERY 



SCARCE), 15s [1850] 



One of the author's most important papers, giving the results of his experiments on the production of heat by friction, 

 which made him one of the originators of the theory of the conservation of energy. ' The introduction to the paper 

 contains a very fair account of the labours of others in the same field. A long series of observaiions, conducted Avith 

 the utmost care, leads to the result that ' the quantity of heat capable of increasing the temperature of a pound of water 

 (weighed in vacuo, and taken at between 55° and (50° F) by 1° F requires for its evolution the expenditure of a mechanical 

 force represented by a fall of 772 lbs. through the space of one foot.' For nearly 30 years this result of Joule's stood 

 alone as the one satisfactory deteDuination of a pliysical constant.'— 2i. T. Qlazebrook, F.R.S. 



9926 On a New Method for ascertaining the Specific Heat of Bodies, 8vo. (pp. \l),sewn, 



as 6c? Manchester, 1846 



9927 Note on the Employment of Electrical Currents for ascertaining the Specific 



Heat of Bodies, 8vo. (pp. 2), unbound, \s Qd [ibidem, 1847] 



9928 On Shooting Stars, 8vo. (pp. 3), unbound, \s 6rf 1848 



' Mentioning for the first time his now accepted explanation of shooting stars.'— Pro/". Osborne Reynolds, F.R.S. 



9929 On the Theoretical Velocity of Sound, 8vo. (pp. 2), unbound, 3s 1847 



' Bringing up Newton's theoretical value from 943 to 1095 feet per second.'— JK. T. Glazebrook, F.R.S. 



9930 , and Lyon [Lord] PLAYFAIR, f.r.s.: Researches on Atomic Volume and 



Specific Gravity. Series III. On the Maximum Density of Water, 8vo. (pp. 7), unbound, 

 3s [1846] 



Giving 39'101° F. as the degree when water reaches its maximum density. 



9931 , Memoir of, by Osborne Reynolds, f.r.s., with fine engraved portrait by Manesse 



after G. Patten, A.R.A., 8vo. d., 5s Manchester, 1892 



The only large biography on Joule hitherto issued, and mainly an account of his scientific achievements. 



V. Sturgeon's Annals of Electricity, post. 



9932 JOWETT (Hooper Albert Dickinson; d.sc. ; F.C.S ; Burroughs, Wellcome d- Co.) The 

 Characters and Methods of Assay of the Official Hypophosphites, cr. 8vo. (pp. 20), 

 sewti. Is [1898] 



9933 The Constitution of Epinephrine, 8vo. (pp. 6), sewn, Is [1904] 



9934 The Constitution of Pilocarpine, 5 parts 8vo. (pp. 81), sewn, 2s [1900-5] 



9935 A New Glucoside from Willow Bark, 8vo. (pp. 6), sewn, Is [1900] 



9936 A New Synthesis of a-ETHYLTRiCARBALLYLic Acid, 8vo. (pp. 6), sewn. Is [1901] 



9937 Pilocarpine and the Alkaloids of Jaborandi Leaves, 8vo. (pp. 26), sewn, Isdd [1900] 



9938 Preparation and Properties of 1 : 4 :5 — Trimethylglyoxaline, 8vo. (pp. 5), 



seivn. Is [1905] 



9939 Some New Gold Salts of Hyoscine, Hyoscyamine, and Atropine, 8vo. (pp. 4), 



sewn, Is [1897] 



9940 , and C. R. MARSHALL, m.d. : The Chemistry and Pharmacology of Jaborandi 



Alkaloids, etc., vith diagrams, cr. Svo. (pp. 13), sewn, Is [1900] 



9941 ^ and Charles Etty POTTER : The Constituents of Commercial Chrysarobin, 8vo. 



(pp. 11), sewn. Is [1902] 



9942 The CONSTITUTION of CHRYS0P^ANIC AciD and of Emodin, Svo. (pp. 8), 



sewn. Is [1903] 



9943 Variations in the Occurrence of Salicin and Salinigrin in different Willow 



and Poplar Barks, 8vo. (pp. 11), sewn. Is [1902] 



9914 JUDE (Alexander) The Theory of the Steam Turbine: a Treatise on the Principles of its 

 Construction, with Historical Notes on its Development, 3 folding plates, and 252 other illustra- 

 tions, sq. Svo. cl., 8s Gd (p. 15s nett) 1906 



9945 JUDE (R. H., Rutherford Coll.) PHYSICS, Experimental and Theoretical, Vol. I. (all pub.) : 

 Mechanics, Hydrostatics, Pneumatics, Heat, and Acoustics, partly from the French (third 

 Edition) of Henri Gossin, with numerous Examples and Exercises, with Answers, 388 illustra- 

 tions, roy. 8vo. cl., 8s (p. 12* 6d nett) 1899 



