3t8 HENRY SOTHERAN & CO., 140, STRAND, W.C, and 37, PICCADILLY, W. 



6782 CAVALLI (Abate Atanagio, University Gregoriana) Lettere Meteorologiche Romane ; 

 with folding plate of meteorological instruments, and view of Caetani Observatory, 8vo. sewn; 

 uncut {rare), 8s 6d Roma, 1785 



6783 CAVALLO (Tiberius, f.r.s.) Complete Treatise of Electricity, in Theory and Practice ; 

 with oriorinal Experiments, first edition, withZ folding copperplates, 8vo. nice copy in contemporary 

 tree-calf gilt, 10s 1777 



6784 Another Copy, sewn, Ss 



The last part, ' New Experiments in Electricity ', contains the author's original investigations and inventions, including 

 that of a pith-ball electroscope which, with modifications, is used at the present time, electrometers for the rain, the 

 electrical kite, and experiments performed with it, etc. etc. 



6785 Second Edition, with considerable Additions and Alterations, and Appendix [pp. 51] , 



vnth i folding copperplates, 8vo. hf calf, 10s Qd 1782 



6786 Another Copy, sewn, 9s 



6787 Third Edition, containing the Practice of Medical Electricity, besides other Addi- 

 tions and Alterations, with 5 folding plates, 2 vols. 8vo. old calf with author's silhouette 

 portrait pasted on flyleaf and his signature underneath, also auto, of W. G. Maton, 

 M.D.,F.B.S.,\lsU 1786 



This edition first contains the Medical Electricity, originally published apart in 1780. 



6788 Fourth [last] Edition, containing the Practice of Medical Electricity, with other 



Additions and Alterations, with Q folding plates, 3 vols. 8vo. hoards, uncut (scarce), £1.1s 1795 



The third volume of this edition is wholly new, and contains discoveries and improvements made since the publication 

 of the third edition. 



6789 Description of a New Electrical Instrument capable of collecting together a 



Diffused or a little Condensed Quantity of Electricity, with copperplate by Basire, 4to. (pp. 6), 

 sewn, 2s 1788 



6790 Description of a Simple Micrometer for Measuring Small Angles with the 



Telescope, with copperplate by Basire, 4to. (pp. 12), sewn, 2s 6o? 1791 



6791 Description and Use of the Telescopical Mother-of-Pearl Micrometer, 8vo. 



(pp. 41), sewn, 4s 1793 



The micrometer was of the author's own invention, and had 'a small semi-transparent scale or slip of mother-of- 

 pearl, about -^ct i'lch broad, divided into a number of equal parts by parallel lines, every fifth or tenth a little longer than 

 the rest. 



6792 The Elements of Natural or Experimental Philosophy, Vol. I, with 8 folding 



copperplates by Basire, 8vo. boards, 3s 6c? 1803 



Containing a chapter on Aerostation (pp. 45). 



Magnetical Experiments and Observations— v. Bennet, nn. 6125, ante. 



6793 Of the Methods of manifesting the Presence, and ascertaining the Quality, of Small 



Quantities of Natural or Artificial Electricity, t^j^YA copperplate,^io. (pp. 22), seivn, 2s Qd 1787 

 6794 Of the Temperament of those Musical Instruments in which the Tones, Keys, or 



Frets, are Fixed, as in the Harpsichord, Org in, Guitar, etc., with large folding table, 4to. 



(pp. 17), sewn, 2s Qd ' 1788 



6795 Treatise on Magnetism, in Theory and Practice, with original Experiments, ^vith 



2 folding plates by Basire, 8vo. hf cL, uncut, 10s 6o? 1787 



' Embracing? all that was known on the subject at the time . . . Cavallo was a Neapolitan wlio came to England in early 

 life, and was the inventor of several philosophical instruments and pieces of apparatus for electrical and chemical experi- 

 ments. Much ingenuity Avas shown in their construction, all his instruments for the measurement of the quantity and 

 force of electricity being remarkable for their extreme delicacy and correctness.'— i2. Hunt, F.R.S. They are shown in 

 the plates of the above works. 



6796 CAVENDISH (Hon. Henry, f.r.s., Account of Experiments made by John McNABof Hud- 

 son's Bay, relative to the Freezing of Nitrous and Vitriolic Acids, 4to. (pp. 16), sewn, 2s 6d 1788 



6797 Account of Experiments made at Henley House, Hudson's Bay, by John McNab, 



relating to Freezing Mixtures, 4to. (pp. 32), sewn, 3s 1786 



6798 On the Conversion of a Mixture of Dephlogisticated and Phlogisticated Air into 



Nitrous Acid, l)y the Electric Spark, 4to. (pp. 16), sewn, 4s Qd 1788 



The author made the important discovery that the electric spark discharged through moist air produces nitric acid— a 

 fact only recently utilised for tlie production of artificial manure. 



6799 On the Height of the Luminous Arch seen on Feb. 23, 1784, 4to. (pp. 10), sewn, 2s 1790 



Including Observations on Respiration by Dr. Priestley. 



6800 , The Life of, including Abstracts of his more important Scientific Papers, and critical 



Inquiry into the Claims of the alleged Discoverers of the Composition of Water, by George 

 Wilson, m.d., with portrait and ivoodcuts, 8vo. cl., Is Qd Cavendish Soc, 1851 



6801 Another Copy, hf calf gilt, 8s Qd 



' Wilson fully established the priority of CaviMulish with regard to the experimental results on which the theory of the 

 composition of water is based, and sliowed that Muirhead and Lord Jeffrey had overestimated Watt's merits.'— Z). N. B. 



6802 CAVENDISH SOCIETY'S Publications ; complete from their beginning in 1848 to their 

 conclusion in 1870, with plates and woodcuts, 29 vols. 8vo. cl., and Atlas, 4to. boards — in all 

 30 vols., £7. 7s 1848-70 



Contents :— Chemical Reports and Memoirs, ed. by T. Graham, p.r.s., '4S : Life and Works of the Hon. Henry 

 Cavendish, by G. Wilson, m.d., 'ol : Lehmann (C. G.) Physiological Chemistry, trans, by G. E. Day, f.r.s., 3 v., with 

 Atlas, '51-4: Memoirs of the Life and Scientific Researches of John Dalton, by W. 0. Henry, f.r.s., 'r)4 : Bischof (K. G.) 

 Elements of Chemical and Physical Geology, trans, by B. H. Paul and J. Drummond, 3 v., '.34-9 : Laurent (A ) Chemical 

 Method, Notation, Classification, and Nomenclature, trans, by W. Odling, f.r s , 'or): Gmelin (L.) Hand-Book of 

 Chemistry, trans, by II. Watts, 19 v., '48-70. 



6803 CAVENTOU (Joseph. Bienaime) Nouvelle Nomenclature Chimique, d'apres la Classi- 

 fication adoptee par M. Thenard, 2® Ed., augment^e; with folding table, 8vo. hoards, or, seivn, 

 4s Qd 1825 



Unknown to PoggendorfT, who mistakenly gives the author's Christian name as Jean Baptiste. At end is a ' Table 

 synonymique' (pp. 101), giving the old and new nomenclature of about 4,000 chemical compounds. 



