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



9811 JOHNSON (Alfred Challice, r.n.) Brief and Simple Methods of Finding the Latitude 

 and Longitude by Single and Double Altitudes, also new Time and Azimuth Methods, 

 with diagram, roy. 8vo. cl., Is 6d 1884 



9812 How to Find the Longitude simultaneously with Latitude at Noon and at other 



Times, how to deduce by Inspection from Two Chronometers both Latitude and Longitude, etc. 

 etc., with Azimuth Table, 3rd Edition, 8vo. (pp. 24), sewn, 3s 1867 



9813 JOHNSON (Alfred Edward, f.i.c.) The Analyst's Laboratory Companion : a Collection 

 of Tables and Data ; 2nd Edition, enlarged, post 8vo. cl., 2s (p. 5*) 1897 



9814 JOHNSON (George Lindsay, m.d., f.r.c.s.) Contributions to the Comparative Anatomy 

 of the Mammalian Eye, chiefly based on Ophthalmoscopic Examination [Philosophical 

 Transactions, B, vol. 194], ivith 30 highly magnified plates (mostly finely coloured), drawnhy 

 Arthur W. Head, f.z.s., from the author's direct observations from living animals^ roy. 4to. 

 sewn^ 155 1901 



' Notwithstanding au extensive literature, a comprehensive comparative anatomy of the mammalian eye still remains 

 unwritten. Microscopical examination is a tedious process, the procuring of absolutely fresh material is by no means 

 easy, and, after all, fresh material is only to be found in the living eye. No amount of fixation or staining will recover 

 what the delicate internal parts lose within a short time after death. It is here that the ophthalmoscope supplies a 

 reliable and most valuable method of research.'— ^h<?io'/'. He is referring to the most remarkable and extensive 

 observations taken by himself, mostly at the Zoological Gardens, under the most unusual and sometimes dangerous 

 conditions — the application of the ophthalmoscope close to the eye whil« the drawing was made, which in the case of sc. 

 the larger /eiidfc may be mildly described as a ticklish proceeding, but which never had any untoward consequences. 



9815 Photographic Optics and Colour Photography, including the Camera, Kinemato- 



graph, Optical Lantern, and the Theory and Practice of Image Formation, with 14 plates 

 (5 coloured), and 170 woodcuts, 8vo. cl., 45 (p. 7* 6r/) ' 1909 



The author is the inventor of the macula sensitometer and various other optical instruments of precision. 



9816 JOHNSON (George Stillingfleet) On Potassium Triiodide, 8vo. (pp. 5), sewn, \s 1877 



9817 JOHNSON (J. C. F., f.g.s.) (Getting Gold: a Practical Treatise for Prospectors, Miners, 

 and Students ; with 50 woodcuts and, diagrams, large cr. 8vo. cl., 2s 1897 



9818 JOHNSON (James and Jolin Henry) The Patentee's Manual : the Law and Practice of 

 Patents for Inventions ; with the Statutes, Rules, and Foreign and Colonial Patent Laws, 

 International Convention and Protocol, 5th Edition, 8vo. cl., 3s (p. 10* 6^) 1884 



9819 Sixth [last] Edition, enlarged, 8vo. cl., 4s 6d (p. 10* 6^) 1890 



9820 JOHNSON (John, surveyor) : Johnsons Arithmetick in two Books : the first of Vulgar 

 Arithmetic, with easie Rules to work all the first four Parts of Arithmetick, in whole Numbers 

 and Fractions; the second of Decimall Arithmetick, whereby all Fractionall Operations are 

 wrought in whole Numbers in Merchants Accounts, without Reduction, with the perfect working 

 of Interests and Annuities ; 6th Edition, with Additional Tables, 16mo. contemporary calj {blanfc 

 bottom corner of title torti o/") ; rare, £1. 5* T. N.for J. Sweeting, 1655 



' In his decimal fractions Johnson lias the rudest form of notation ; for he generally writes the places of decimals over 

 the figures, thus :— 1.2.3.4.5. 



14603317 would be 146/0 3 8 17. 

 Otherwise his system is tolerably complete.'— Pro/, de Morgan. 



9821 J9HNSON (Jolin Butler, Univ. Wisconsin) Theory and Practice of Surveying; 15th 

 Edition, enlarged, with 151 illustrations [including plates), 8vo. d., Is (p. 17* ^d nett) 



New York, \mO 



9822 JOHNSON (Lewis Jerome, Harvard Univ.) Statics by Algebraic and Graphic 

 Methods, ivith 5 folding plates, and 42 woodcuts, 8vo. cl., As M (p. 85 Qd nett) New York, 1903 



9823 JOHNSON (Manuel John, f.r.s., p.r.a.s.) A Catalogue of 606 Principal Fixed Stars 

 in the Southern Hemisphere : deduced from Observations at the Observatory, St. Helena, from 

 November, 1829 to April, 1833, 4to. (pp. 83), sewn, 6s 1835 



' This imijortant catalogue was, besides the Madras catalogues, the only source for exact places of the fixed stars 

 situated beyond tiie reach of the observatories of Europe,'— A/iss Agnes M. Gierke. It was awarded the Royal Astronomical 

 Society's gold medal. 



9824 JOHNSON (Thomas, Magdalene Coll., Cantab.) Qu.estiones Philosophic^, in justi 

 Systematis Ordinem dispositfe, Editio II., multo auctior et ad Usus Philosophicos accommo- 

 datior; subjicitur Appendix de Legibus Disputandi, 12mo. old calf {joints cracked), 65 



Cantabrigice, 1735 

 Including astronomy, physics, and chemistry, one of the questions in the latter being, ' Aurum arte chemica ex 

 quibusvis aliis metallis confici possit?' 



9825 JOHNSON (W. E., King's Coll., Cantab.) Treatise on Trigonometry, with diagrams, 

 cr. 8vo. cl., is (p. 85 M) _ 1889 



With final cliapter on the interpretation of a/— 1, as an introduction to the study of quaternions. 



9826 JOHNSON (William, m.i.m.e.) The Imperial Cyclopedia of Machinery: Plans, 

 Sections, and Elevations of Stationary, Marine, and Locomotive Engines, Spinning Machinery, 

 Grinding Mills, Tools, etc. etc., with Essay on the Steam Engine, and History of the Railways 

 of Great Britain, ivith fine bust portrait of James Watt by J. Le Conte, about 100 plates {mostly 

 folding), and numerous woodcuts and diagrams, 2 vols, folio, hf calf {rubbed), lOs 6d 



Glasgow [1856] 



9827 The Practical Draughtman's Book of Industrial Design, founded on the v\ ork 



of Armengaud and Amouroux, with additional Plates ; 2nd Edition, with 55 double plates, 

 besides numerous ivoodcuts and diagrams, 4to. hf. calf {rubbed), 4s 6d (p. £1. 8s 6d) I860 



9828 JOHNSON (William Woolsey, U.S.N. Academy, Annapolis, Md.) Curve Tracing in 

 Cartesian Coordinates, with 54 diagrams, cr. 8vo. cl., with auto, of, and MS. problems by, 

 F. J. Jervis-S7nith, pr., F.R.S. {scarce), Qs %d 1885 



9829 Second Edition [unchanged], with 54 diagrams, cr. 8vo. cl., bs 1888 



