Feb. 13, 1879] 



NATURE 



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^aU i)B auc tion. 



\'a1iiable Library of the late Dr. BUTTER, of Hazelwood, Upper 

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MESSRS, HODGSON will SELL by AUC- 



TION' at their Rooms, 115. Chancery Lane, W.C, on WEDNESDAY, 

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 the valuable LIBRARY of the late DONALD BUTTER, Esq., M.D., 

 comprising Curtis's Botanical Magazine, 102 vols. — Sowerby's English 

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 Books relating to Scotland and India — Dr. Smith's Dictionaries, 9 vols. 

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 5 vols. — Knight's Popular England, Shakspere, and London, 20 vols. — 

 Scott's Works, 102 vols. — Ballantyne's Novelist's Library, 10 vols. — 

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To be viewed and Catalogues had. 



"HALL MARK" 

 FOR THERMOMETERS. 



The Kew Committee of the Royal Society hereby give Notice that after 

 this date all Thermometers verified at the Kew Observatory will be marked, 

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 The 'Table of Errors will be furnished as usual. 

 By order, 



G. M. WHIPPLE, Superintendent. 

 Kew Obseri-atory^ December 13, 1878. 

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GEOLOGY.— In the Preface to the Student's 



ELEMENTS of GEOLOGY, by Sir Charles Lyell, priee 9*., he says : 

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Contents. 

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



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



IV. The Problem of FLght — Ballooning in Arctic Exploration, 

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