TJHLJliSAUllUS SHjU-KIUUS. 



In demy 4to, price 18s., 



THE FLORA AND FAUNA OP THE SILURIAN PERIOD, 



With Addenda (from recent acquisitions). 



By JOHN J. BIGSBY, M.D., F.R.S., &c. 



John Van Voorst, 1 Paternoster Row. 



LUNAR MAP AND CATALOGUE. 



The revised impression of the Monogram of the MARE SERENITATIS, con- 

 taining 277 references, being 250 more than in Beer and Madler's work, with 

 complete Catalogue, including authorities, recent discoveries on Plato aud lunar 

 tints, is now in course of delivery to Subscribers to the Lunar Map and Catalogue 

 commenced under the auspices of the British Association for the Advancement of 

 Science. Further particulars may be known on applying to W. R. Birt, F.R.A.S., 

 Cynthia Villa, Walthamstow, Essex. 



MR. WATTS'S DICTIONARY OF CHEMISTRY. 



Complete in Five Volumes, 8vo, price M7 3s., or separately, Vols. I. and III. 

 price 3ls. 6 J. each ; Vol. II. price 26s.; Vol. IV. price 24s.; and Vol. V. price 30s. 

 cloth. 



A DICTIONARY OF CHEMISTRY AND THE ALLIED BRANCHES 



OF OTHER SCIENCES. 



By HENRY WATTS, F.R.S., 



Assisted by eminent Scientific and Practical Chemists. 



" The greatest work which England has 

 yet produced on chemistry, one of the 

 greatest indeed which she has produced 

 upon any scientific subject, is finished at 

 last, and we are able to congratulate Mr. 

 Watts most sincerely upon its completion. 

 The first t Number was issued more than 

 five years ago, and though some slight de- 

 lays have latterly occurred, the publication 

 has been carried on with most commend- 

 able regularity. The general confidence 



London : Longmans, Green, and Co., Paternoster Row. 



THE aUARTERLY JOURNAL OF SCIENCE. 



Conducted by Sir W. Fairbairn, Bart., F.R.S., W. Crookes, F.R.S., R. 

 Hunt, F.R.S., H. Woodward, F.G.S., F.Z.S., and J. Samuelson, Editor. 



Illustrated with Two Coloured and One Plain Page Plates and Twelve Woodcuts. 

 No. XXV. January 1870. Price 5s. 

 I. Light and Sound : an Examination of their Reputed Analogy. Illustrated. 

 By W. F. Barrett, F.C.S., Natural Science Master at the London Inter- 

 national College, &c. 

 II. On the Principles and Methods of Sewage Irrigation. Illustrated. 



III. The Total Solar Eclipse of August last. Illustrated. By William Crookes,, 

 F.R.S. &c. 



IV. Instruction in Science for Women. 



V. On Idiocy. By P. Martin Duncan, M.B. Lond., F.R.S. &c. 

 VI. The French Imperial School of Forestry. By Alfred Pengelly, B.A. 



Cambridge. 

 VII. The Fuller's Earth of the South-west of England. By Ralph Tate, As- 

 sociate Linn. Soc. F.G.S. &c. 



Notices of Recent Scientific Works. 



Chronicles of Science. 



With Proceedings of Learned Societies and recent Scientific Literature, 



London : Longmans, Green and Co., Paternoster Row. 



in the learning and energy of the Editor, 

 which his previous labours had inspired, 

 has been justified in the fullest manner, 

 and every chemist will be proud to ac- 

 knowledge the debt of gratitude which he 

 owes to him. Very few, even among the 

 few who were fitted for such a task, would 

 have cared to undertake it, and no one 

 who had undertaken it could possibly have 

 executed it more ably or thoroughly." — 

 Chemical News. 



