12 GENERAL SCIENTIFIC WORKS 



HELMHOLTZ. — ir'Oi?A'S' by HERMANN L F. HELMHOLTZ, 

 M. ]>., late Fnifessor of Physics in the University of Bert in. 



ON THE SENSATIONS OF TONE AS A PHYSIOLOGICAL 



BASIS FOE THE THEOEY OF MUSIC. Second English 

 Edition ; with numerous additional notes and a new Additional Appendix, 

 bringing down information to 1885, and specially adapted to the use uf 

 Musical Students. By ALEXANDER .). ELLIS, B.A., P.R.S., F.S.A., 

 etc., formerly Scholar of Trinity College, Cambridge. With 68 Figures 

 engraved on Wood, and 42 Passages in Musical Notes. Royal 8vo, 28.s. 



POPULAE LECTIJEES ON SCIENTIFIC SUBJECTS. Witii 



08 Woodcuts. 2 vols. Crown 8vo, Bs. 6cl. each. 



HERSCHEL. OUTLINES OF ASTEONOMY. By Sir john f. 



W. HERSCHEL, Bart., K.H., etc., Member of the Institute of France. 

 Twelth Edition, with 9 Plates, and numerous Diagrams. 8vo, 12.s. 



HOFF. THE AEEANGEMENT OF ATOMS IN SPACE. By 



J. H. VAN 'T HOFF. Second, Revised and Enlarged Edition. With a 

 Preface by JOHANNES WISLICENUS, Professor of Chemistry at the 

 University of Leipzig ; and an Appendix, " Stereochemistry among Inorganic 

 Substances," by ALFRED WERNER, Professor of Chemistrv at the Uni- 

 versity of Ziirich. Translated and Edited by ARNOLD" EILOART. 

 Crown 8vo, 6s. 6f/. 



HUDSON AND GOSSE. THE EOTIFEEA OE "WHEEL 



.\NIMALCULES ". By C. T. HUDSON, LL.D., and P. H. GOSSE, 

 F.R.S. With 30 Coloured and 4 Uncoloured Plates. In 6 Parts. 4to, price 

 lO.s. 6(/. each ; Supplement, 12.s. 6d. Complete in Two Volumes, with 

 Supplement, 4to, £4 4.s-. 



*^* The Plates in the Supplement contain figures of almost all the Foreign 

 Species, as well as of the British Species, that liave been discovered since the 

 original publication of Vols. I. and II. 



JOUBERT. ELEMENTAEY TEEATISE ON ELECTEICITY 



AND MAGNETISM. Founded on Joubert's " Traitr El,'mnitai>r 

 d'Elecfricite". By G. C. FOSTER, P.R.S., Quain Professor of T'hysics in 

 University College, London; and E. ATKINSON, Ph.D., formerly Pro- 

 fessor of Experimental Science in the Staff College. With Illustrations. 

 Crown 8vo. [Ncir Edition in the /'/vw. 



K LOCKER. FEEMENTATION OEGANISMS IN THE 

 THEOEY AND PEACTICE OF THE AIXIOHOLIC FEE- 

 MENTATION INDUSTEY, with special reference to the Construe- 

 tion and Work of Ijaboratorjes for the Pliysiology and Technology of 

 Fermentation. By ALB. KLOCKER, Assistant in the Carl.sberg Labora- 

 tory, Copenhagen. Translated from tlie German by G. E. .\LLAN. 

 B.Sc, Lecturer in tlie University of Birmingham, and .J. H. MILLAR, 

 F. I.e., formerly Lecturer in the British School of Malting and Brewing, 

 and revised by the Author. Witli 146 Illustrations in the Text. 8vo. 



