Feb, 20, 1879] 



NATURE 



CXXlll 



c. 



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GEOLOGY.— In the Preface to the Student's 



ELEMENTS of GEOLOGY, bv Sir Charles Lyell, price 9*., he says : 

 — *' As it is impossible to enable the reader to recognise roclts and mine- 

 rals at sight by aid of verbal descriptions or figures, he will do well to 

 obtain a well arranged collection of specimens, such as may be procured 

 from Mr. TENNANT (149, Strand), Teacher of Mineralogy at King's 

 College, London." These Collections are supplied on the following 

 terms, in plain Mahogany Cabinets : — 



100 Specimens, in Cabmet, with 3 Trays .» .m ... £i a o 

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More extensive Collections at 50 to 5,000 Guineas each. 



MINERALOGY AND GEOLOGY. 



A New List of Collections of Fossils, Minerals, and Rocks now ready, 

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JAMES R. GREGORY, 



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88, CHARLOTTE STREET, FITZROYj SQUARE. 

 SHEPPEY FOSSILS. 



W. H. SHRUBSOLE, Sheerkkss-on-Sea, respectfully intimates thai 

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Orders for los. Collections of 100 "good" specimens can be executed 

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" NOTES ON THE GEOLOGy OF SHEPPEY " post free on appli- 

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ELECTRICAL & SCIENTIFIC APPARA- 

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MINERALOGY AND GEOLOGY. 



24 assorted Minerals for Blowpipe Experiments, with printed List, in 

 Pocket Case, 2s. ; 24 ditto (second series), 2J. ; Mob's Scale of Hardness 

 of Minerals, 9 Specimens with File and streak tablet in a convenient Case, 

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THE "HANSA," 



Published since 1864, in Hamburg^ is the only independent professional 

 paper in Germany, dedicated exclusively to Maritime Objects. Essays, 

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THE 



MONTHLY JOURNAL OF SCIENCE 



AND ANN'AI.S OK 



BIOLOGY, ASTRONOMY, GEOLOGY, INDUSTRIAL ARTS. 

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Edited by WILLIAM CROOKES, F.R.S., &c. 



The first nu.-nber cf the Monthly Series (Febniary, 1879) is 

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Price ONE SHILLING and SIXPENCE. 

 Ctmtents. 

 I. "Progress" — The Alleged Distinction between Man and Brute. 

 II. Matter Dead — Roger Bacon and John Dalton. 



III. A Contribution to the Historv of Electric Lighting. By W. 



Mattieu Williams, F.C.S., F.R.AS. 



IV. The Problem of Flight — Ballooning in Arctic Exploration. 

 V. Electric Lighting. By Prof. W. E. Ayrton. 



VI. Instinct or Reason ? 

 VII. New Achromatic Microscope. 

 VIII. Safe AnjEsthesia. 

 IX. On the Transmission of Power by Means of Electricity. By Profs, 



Elihu Thomson and Edwin J. Houston. 

 Correspondence — The Band-Pattern in Animals — The Sea-Serpent. 

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London : 3, Horse-Shoe Court, Ludgate Hill. 



THE 



AUSTRIAN MONTHLY ORIENTAL 



REVIEW. 



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NORTH BRITISH AGRICULTURIST, 



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Full Reports are given of the Meetings of the Royal Agricultural Society 

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