168 HENRY SOTHERAN & CO., 140, STRAND, W.C., AND 37, PICCADILLY, W. 



3353 [NORWOOD (Richard), and Henry BOND:] A TRIANGULAR CANON LOGARITHMICALL, or 

 a Table of Artificiall Sines, Tangents, and the Complements Arithmeticall of Sines supplying the 

 use of Secants : To Radius, 10,000 00, and to every Degree and Minute of the Quadrant, 12mo. hf. 

 roan (? imperfect at end) ; RARE, 15s W. Leybourn, 1664 



3354 NOYES (William Albert, edr. Jl. Amer. Chem. Soc.) ORGANIC CHEMISTRY for the LABORA- 

 TORY ; with figures, sq. post 8vo. cl., 3s (p. 6* Qd nett) Boston, Pa., 1897 



3355 NUIS (Hendrik Jaspar) 't GEBRUIK van het RECTANGULUM CATHOLICUM GEOMETRICO- 

 ASTRONOMICUM, ofte Reghthoekig Algemein Meet-en Sterkundig Plat, verstrekkende voor een 

 PROPORTIONAAL-PASSER, MEETKUNDIG ASTROLABIUM, ALGEMEINE ZONNEWYZER, enz. ; with 

 2 folding plates, and numerous woodcuts and diagrams, cr. 4to. old white vellum (VERY FINE 

 COPY), 155 Zwolle, 1686 



VERY RARK ; unknown to Poggendorff, Brunet, and other bibliographers. Pp. 310-41 contain chapters on DIALLING. 



3356 NYSTROM (John W., C.E.) PROJECT of a NEW SYSTEM of ARITHMETIC, Weight, Measure, 

 and Coins, to be called the TONAL SYSTEM, with Sixteen to the Base, coloured front, of ' tonal ' 

 measures, and diagrams, roy. 8vo. cl. (scarce), 7s Qd Philadelphia, 1862 



A counterblast to decimalisers. The author claims this to be the best of all systems ' for measurement in the shop and 

 market as for calculation, being based on binary multiplication and division '. 



3357 OBACH (Eugene F. A.) CANTOR LECTURES on GUTTA PERCHA, with 13 plates and numerous 

 other illustrations, impl. 8vo. sewn, 3s 1898 



3358 O'BRIEN (Charles) The CALLICO PRINTERS' ASSISTANT; from the first Operation of Designing 

 Patterns, to the Delivery of Work for Sale, with Thoughts on Genius and Invention, Suggestions 

 for an Improved Mode of Printing, etc. etc., and a concise HISTORY of CALLICO PRINTING: 

 White (J.) ART'S TREASURY of RARITIES, and CURIOUS INVENTIONS, containing the Mystery of 

 Dying [sic] Cloth, Silk, etc., preparing and colouring Skins . . . cementing broken Glass and 

 China, etc." etc. etc., 6th Ed. 2 vols. 12mo. in 1, old calf gilt (rare), Us Qd \789-Glasgow, 1773 



3359 O'BRIEN (Matthew, pr., Caius Coll.] ELEMENTARY TREATISE on the DIFFERENTIAL CALCULUS, 

 in which the METHOD of LIMITS is exclusively made Use of, 6 folding plates, 8vo. boards, 3s Qd 



Cambridge, 1842 



3360 MATHEMATICAL TRACTS, PT. I: on Laplace's Coefficients, the Figure of the Earth, the 



Motion of a Rigid Body about its Center of Gravity, and Precession and Nutation, 8vo. sewn, 3s 



ibidem, 1840 



3361 - - TREATISE on PLANE CO-ORDINATE GEOMETRY, Part I [all published, containing Right 

 Lines, Circles, and Conic Sections], 5 plates, large 8vo. boards, 3s Qd ibidem, 1844 



A COMPLETE SET TO 1905 : 



3362 OBSERVATORY (The) : a MONTHLY REVIEW of ASTRONOMY, edited by SIR W. H. M. 

 CHRISTIE, F.R.S., E. W. MAUNDER, H. H. TURNER, T. LEWIS, and H. P. HOLLIS, FF.R.A.S., 

 COMPLETE from the beginning in 1877 to 1905, with numerous photographic and other plates 

 (including portraits), and woodcuts, 28 vols. 8vo. , vv. 1-27 in hf. calf gilt, and v. 28 sewn (NICE 

 SET) ; SCARCE, 7. 10* 1877-1905 



3363 ANOTHER SET, from 1884 to 1893 (Vols. VII XVI), with plates and ivoodcuts, 10 vols. 



Svo. in 6, hf. roan gilt, 1. \s 1884-93 



3364 ODE (Jacobus, Univ. Utrecht] PRINCIPIA PHILOSOPHISE NATURALIS; with 42 plates, 2 vols. 

 4to. in 1, old calf (joints cracked), 4s Trajecti, 1726-7 



3365 - ANOTHER COPY, old calf gilt, with bookplate of Philip 2nd Earl Stanhope, F.R.S., 5s 



Unknown to Poggeiulorft". 



3366 ODLING (William, F.R.S., Waynflete Prof. Chemistry, Oxon.) COURSE of PRACTICAL 

 CHEMISTRY for MEDICAL STUDENTS, post 8vo. cl., Is 1854 



3367 _ SECOND EDITION, woodcuts, post 8vo. cl., with Prof. Williamson's auto., Is Qd 1865 



3368 LECTURES on ANIMAL CHEMISTRY, post Svo. cl., with author's inscr. (out of print), 



2s Qd 1868 



3369 - MANUAL of CHEMISTRY, Descriptive and Theoretical, PART I (all published), 8vo. 

 boards (scarce), Qs 1861 



3370 - OUTLINES of CHEMISTRY, or Brief Notes of Chemical Facts, post Svo. cl. (out of print), 

 3s Qd ' 1870 



3371 OERSTED (Hans Christian) EXPERIMENTA circa EFFECTUM Conflictus Electrici in ACUM 

 MAGNETICAM, editio princeps, 4to. boards (VERY RARE), Hafnice, 1820 



This classic work contains the author's discovery of electro-magnetism, the starting-point of electrical engineering. 

 ' Oersted showed that a magnet tends to set ii self at right angles to a wire carrying an electric current. He also found 

 that the way in which the needle turns, whether to the right or to the left of its usual position, depends upon the position 

 of the wire that carries the current whether it is above or below the needle and on the direction in which the current 

 flows through the wire.' Prof. Silvanus Thompson. 



3372 OHM (Georg Simon) Die GALVANISCHE KETTE, MATHEMATISCH BEARBEITET ; original 

 edition, with plate, post Svo. boards (RARE), 15* Berlin, 1827 



This work first contains one of the most important discoveries in electrical science, now known as Ohm's Law the basis 

 ol the present system of electrical measurements. 



3373 _ _ THEORIE MATHEMATIQUE des COURANTS ELECTRIQUES : Traduction, Preface et Notes 

 par J. M. GAUGIN ; with diagrams, 8vo. hf. brown calf gilt (nice copy) ; scarce, 10s Qd 1860 



The first French translation of the above work. 



3374 OPPOLZER (Theodor Bitter v. ; Univ. Vienna) LEHRBUCH zur BAHNBESTIMMUNG der 

 KOMETEN und PLANETEN (Bd. I, 2. vollig umgearbeitete Aunage), 2 vols. impl. Svo. in 1, hf. 

 morocco gilt, uncut (VERY SCARCE), 7. 10s Leipzig, 1882-80 



LAST EDITION of this important work, the most complete treatise ever issued on the calculation of the courses of 

 comets and planets, representing a wholly new treatment of the subject, and suggesting numerous improvements in tho 

 methods hitherto pursued. 



