14 CATALOGUE OF SCIENTIFIC BOOKS. 



The Practice of Hand Turning in Wood, Ivory, Shell, 



etc.j with Instructions for Turning such Work in Metal as may be required 

 in the Practice of Turning in Wood, Ivory, etc. ; also an Appendix on 

 Ornamental Turning. (A book for beginners.) By Francis Campin. 

 Third edition, with wood engravings, crown 8vo, cloth, 6s. 



Contents : 



On Lathes — Txirning Tools — ^Turning Wood — ^Drilling; — Screw Cutting — Miscellaneous 

 Apparatus and Processeb — Turning Particular Forms — Staining — Polishing— Spinning Metals 

 — Materials — Ornamental Turning, etc. 



Health and Comfort in House Building, or Ventila- 

 tion with Warm Air by Self-Aciing Suction Potver^ with Review of the 

 mode of Calculating the Draught in Hot- Air Flues, and with some actual 

 Experiments. By J. Drysdale, M.D., and J. W. Hayward, M.D. 

 Second edition, with Supplement, with plates, demy 8vo, cloth, "js, 6d, 



Treatise on Watchwork, Past and Present, By the 



Rev. H* L. Nelthropp, M.A., F.S.A. With 32 illustrations, crown 

 8vo, cloth, 6 J-. 6d, 



Contents : 



Definitions of Words and Terms used in Watchwork— Tools — ^Time— Historical Sum- 

 mary — On Calculations of the Numbers for Wheels and Pinions; their Proportional Sizes, 

 Trains, etc. — Of Dial Wheels, or Motion Work — Length of Time of Going without Winding 

 up — The .Verge —The Horizontal — The Duplex^ — The Lever — The Chronometer— Repeating 

 watches— Keyless Watches — The Pendulum, or Spiral Spring — Compensation — Jewelling of 

 Pivot Holes — Clerkenwell — Fallacies of the Trade — Incapacity of Workmen — How to Choose 

 and Use a Watch, etc. 



Notes in Mechanical Engineering, Compiled prin- 

 cipally for the use of the Students attending the Classes on this subject at 

 the City of London College. By PIenry Adams, Mem. Inst. M.E., 

 Mem. Inst. C.E., Mem. Soc. of Engineers. Crown Svo, cloth, zs, 6d. 



Algebra - Self Taught By W. P. Higgs, M.A., 



D.Sc, LL.D., Assoc. Inst. C.E., Author of * A Handbook of the Differ- 

 ential Calculus,' etc. Second edition, crown Svo, cloth, 2^". 6d, 



Contents : 



Symbols and the Signs of Operation — The Equation and the Unknown Quantity — 

 Positive and Negative Quantities — Multiplication — Involution — Exponents — Negative Expo- 

 nents — Roots, and the Use of Exponents as Logarithms — Logarithms — Tables of Logarithms 

 and Proportionate Parts — Transformation of System of Logarithms — Common Uses of 

 Common Logarithms — Compound Multiplication and the tiinomial Theorem — Division, 

 Fractions, and Ratio— Continued Proportion— The Series and the Summation of the Series — 

 Limit of Series — Square and Cube Roots — Equations — List of Formulae, etc. 



Spons' Dictionary of Engineering, Civil, Mechanical, 



Military, and Naval; with technical terms in French, German, Italian, 

 and Spanish, 3100 pp., and nearly Zooo engravings, in super-royal Svo, 

 in 8 divisions, 5/. Sj-. Complete in 3 vols., cloth, 5/. 5^. Bound in 

 superior manner, half-morocco, top edge gilt, 3 vols., 6L 12s, 



