August 7, 1879] 



NATURE 



cxv 



THIN GLASS FOR MICROSCOPIC 



MOUNTING, of best quality. Circles, «. ^d. per ounce ; Squares, 

 af. 9</. ; post free ^d, extra ; Ground edged Slips, 5J. per gross : also 

 other Mounting Materials and Objects prepared for mounting.— CHAS. 

 PETIT, isi, High Street. Stoke Ncwington. N. 



MINERALOGY AND GEOLOGY. 



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

 including Special Collections to illustrate the various Tejtt-books, in 

 Cabinets. List of Sections <,i Rocks for the Microscope. Blowpipe Appa- 

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 Geological Hammers, with prices. List of N«w and Second-hand Books of 

 JAMES R. GREGORY, 

 MUSEUM OF GEOLOGY, 

 88, CHARLOTTE STREET, FITZROY SQUARE. 



CASTLETON, DERBYSHIRE, 

 JOHN TYM 



Has largely added to his stock of Fossils and Minerals, and is now oflfering 

 greatly improved Educational Collections at very Low Prices. 



For full particulars see his Catalogue, sent post free on application. 

 Postal Address— 

 CASTLETON -M SHEFFIELD. 



LABORATORY, 38, GRACECHURCH STREET. LONDON, E.C. 



A. ANTHONY NESBIT, F.C.S., 



WATER ANALYST, 



Performs every description of Water Analysis on moderate terms. 



Properly cleansed bottles for the reception of samples sent to any part of 



the Ki^igdom. 



ELECTRICAL, SCIENTIFIC, & PHOTO- 



GRAPHIC APPARATUS.- Electric Bells, Fire ard Thief Alarms, 



and Automatic Switches. Induction Coils, Frictional Machines, Lamps, 

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MINERALOGY AND GEOLOGY. 



COLLECTIONS TO ILLUSTRATE THE ABOVE SCIENCES, 

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SINGLE SPECIMENS FROM ^J. 



DIOPIASE, ZIRCON, RUBELLITE, XANTHOPHYLLITE. 

 SIBERL\. 



KEILHAUITE, PYROCHLORE, APATITE, NORWAY 



A SMALL QUANTITY OF THORITE AND ORANGITE, VERY 



BLOWPIPE CASES, HAMMERS AXD CHISELS, AND CRYS- 

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PaiVAX£ LESSONS AND EVENING CLASSES. 



SAMUEL HENSON, 



277 (Late ii3<t), STRAND, LONDON, W.C. 



~ SHEPPEY FOSSILS. 



W. H. SHRUBSOLE, F.G.S.. Shberhess-on-Sea, having a large 

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 100 good Specimens, correctly named, for 5J. ; 100 assorted Specimens, un- 

 named, 2S, Not less than 50 sent at these rates. 



NORTH BRITISH AGRICULTURIST, 



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THE QUARTERLY REVIEW, 



No. 295, is published THIS DAY 

 Contents. 

 r.— THE ENGLISH MONARCHY. 

 II.— DEAN HOOK AND BISHOP SELWYN. 

 III.— MUSIC AND MUSICIANS. 

 IV.— COUNT CAVOUR. 



v.— HEREFORDSHIRE. 

 VI.— POLYBIUS AN. J HIS TIMES. 

 Vn.— GLACIAL EPOCHS AND WARM POLAR CLIMATES* 

 VIIL— WHY IS SCOTLAND RADICAL? 

 IX.— THE IRISH UNIVERSITY BILL. 



JOHN MURRAY, Albemarle Street. 



THE ENTOMOLOGIST'S MONTHLY 

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Price Sixpence, Monthly, 24 pages Svo, wilh occasional Illustrations. 



Conducted by J. W.Douglas, R. McLachlan, F.R.S., E. C. Rye, F.Z.?. 



and H. T. Stainton, F.R.S. 



This Magaiine, commenced in 1864, contains standard articles and nott s 



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the British Isles. 



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LA SEMAINE FRANCAISE : a Weekly 



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THE BEST FARMER S' NEWSPAPER, 



THE CHAMBER OF 

 AGRICULTURE JOURNAL 



AND FARMERS' CHRONICLE, 



Edited by John Algernon Cu^rkb, Secretary to the Central Chamber 



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