August 14, 1879] 



NATURE 



cxxiii 



LIBRARY OF HARVARD UNIVERSITY, 

 CAMBRIDGE, MASS., U.S.A. 



Packages for the General Library, or for any •£ the Departmental 

 Libraries (A^trenomical Observatory, liotanJc Garden, Eussey Institution, 

 Divinity School, Law School, Museum of Comparative Z»oloffy, Scientific 

 School), may be sent to the Agents, Messrs. TrUbner & C*<, 57 and 59, 

 Ludgate Hill, London. 



JUSTIN WINSOR, Librarian. 



MINERALS, ROCKS, AND FOSSILS. 



COLLECTIONS IN CABINETS. 



Two Hundred Specimens, 40^. ; 150 do., 30J. ; 100 do., aoj. ; 50 do., loj. 

 Size of Specimens. 2 square inches. Naming and Localities guaranteed. 



Superior Cabinets fitted with Card-Trays and Catalogue included. 



**'ihe Popular Scientific Pocket Cabinet Series " comprises 9 Cabinets and 

 S24 Specimens, -zs, 6d. each Cabinet, free delivery, 4*/. (See Nature, 

 March 13, No. 489, page 447.) 



The Collector's Field Apparatus complete, 2ir. Hammer-holder and 

 Waist-strap, price 2^. Collecting-bag (figured and described), price 4^. 



THOMAS J. DOWNING, Geologist, &c., 



33, WHISKIN STREET, LONDON, E.C. 

 Catalogue, Lists, and " Quarterly Circular*' free on receipt of 2d. postage. 



Mr. TENNANT, F.G.S., Professor of 



Mineralogy and Geology, Mineralogist by Appointment to Her Majesty 

 aiid the Baroness Burdett-Coutts, 149, Strand, London, W.C., having 

 been fifty years in business, contemplates shortly RETIRING, and 

 olTers for SALE several of his extensive COLLECTIONS of Minerals, 

 Rocks, and Fossils. They are well adapted for first-class Educational 

 Establishments, Provincial or Colonial Museums, or for the Private 

 Study of any Scientific Person wishing to become acquainted with the 

 above-mentioned Sciences. From £1,000 to 5,o»o Guineas. Students* 

 Collections at 2, 5, 10, 2«, to 50 Guineas. 



CASTLETON, DERBYSHIRE. 

 JOHN TYM 



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

 j?;reatly improved Educational Collections at very Low Prices. 



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

 Postal Address — 

 CASTLETON viA 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 Kingdom. 



ELECTRICAL, SCIENTIFIC, & PHOTO- 



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

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

 and Batteries. Microphones, Wires, Magnets, Carbons, and all Mate- 

 rials. Repairs and Alterations. New Illustrated Descriptive Catalogue, 

 one Stamp. Cameras, Dry Plates, Sensitive Paper, and all Chemicals. 

 I'hoto. List free.— DALE & CRAMFl'ON, Manufacturing Opticians, 

 4, Little Britain, London, E.C* 



MINEEALOGY AND GEOLOGY. 



COT.LECnoNS TO ILLUSTRATE THE ABOVE SCIENCES, 

 iKOM 4J. 



SINGLE SPECIMENS FROM 3^. 



DKJPTASE, ZIRCON, RUBELLITE, XANTHOPHYLLITE, 

 SlliKRIA. 



KKILHAUITE, PYROCHLORE, APATITE, NORVTAV. 



A SMALL QUANTITY OF THORITE AND ORANGITE, VERY 

 RARE. 



l:LOWPIPE CASES, HAMMERS AND CHISELS, AND CRYS- 

 TAL HOLDERS. 



PRIVATE LESSONS AND EVENING CLASSES. 

 SAMUEL, HENSON, 

 277 (Late 113a), STRAND, LONDON, W.C. 



SHEPPEY FOSSILS. 



W. H. SHRUBSOLE, F.G.S.. Shrernkss-on-Sea, h.aving a large 

 quantity of the above on hand, offers, FOR A FEW WEEKS ONLY, 

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

 Bi.-oacd, IS. Not less than 50 sent at these rates. 



THIN GLASS FOR MICROSCOPIC 



MOUNTING, of best quality. Cu'cles, «. dd. per ounce ; Squares, 

 3f. f)d. ; post free 2d. extra ; Ground cdgecT Slips, 51. per gross : also 

 ( t'icr Mounting Materials and Objects prepared for mounting.— CHAS. 

 I'E! IT, 151, High Street, Stoke Newiugton, N. 



SIR JOSIAH MASON'S SCIENCE 

 COLLEGE, BIRMINGHAM. 



It is intended to OPEN this College in the month of OCTOBER, 1S80. 



The full staff of Professors will include those necessary to enable Students 

 to pass the Examinations of the University of London for the degrees of 

 B.Sc. and D.Sc. 



The Professors of Mathematics, Physics, Chemistry, and Biolcgy (includ- 

 ing Botany and Zoology), will be the first appointed. 



The appointments will be made fcr a term of three years, renewable at 

 the pleasure of the trustees. The stipend in each case will be £2So per 

 annum, with half the class fees. 



Applications from Candidates must be forwarded not later than the 31st 

 of December next to the Hcnorary Sccreiarj' to the Trustees, Mr. G.J. 

 Johnson, 36, Waterloo Street, Birmingham, from whom any further infor- 

 mation may be obtained. 



By a resolution cf the Trustees, Candidates are specially requested to 

 abstain from canvassing. 



ASTRONOMICAL TELESCOPES. — Cal- 



VER'S REFLECTING TELESCOPKSof the highest excellence, from 

 5i in. to 36 in. aperture ; ji in., ^vith equatorial motion, ;£ 15 15^.: 6 in. 

 equatorial, complete, from ^6^5- Photo, with Calver's " Hints on Silvered 

 Glass Reflecting Telescopes." 9 stamps.— G. CALVER, F.R.A.S., Hill 

 House, Widford, Chelmsford. 

 FOR SALE.— A very fine 15', in. EQU.^TORIAL, with Clock. 



As FACTOR or STEWARD of Estates, a 



Practical and Energetic Man, highly recommended, can superintend 

 building, drainage, road-making, cutting down, converting, and mea- 

 suring of timber, &c. Wife understands dairy and poultry. Address 

 C. L., care of Messrs. Macmillan and Co., su and 30, Bedford Street, 

 Strand. 



THE MIDDLESEX HOSPITAL. 



The WINTER SESSION will] open on WEDNESDAY, October ist, 

 with an Introductory Address at 3 p.m. by Dr. Sidney Coupland. 



The Medical School attached to the Hospital provides the most complete 

 means for the education of Students preparing for the University of London, 

 the Colleges of Physicians and Surgeons, and the Society of Apothecaries. 



Two Entrance Scholarships of the annual value of £■2$ and £,-30^ tenable 

 for two years, will be competed fcr on September 29th and fcllowing days. 



Further information may be obtained from the Dean or the Resident 

 Medical Officer at the Hospital. 



ANDREW CLARK, Dean. 



TO BE LET, FURNISHED, a Comfortable 



HOUSE, about thirty miles from London, with large old-fashioned 

 Garden and Meadow, the Garden well stocked with Flowers, Fruit 

 Trees, and Vegetables. Two good Sitting-rooms five Bed-rooms, and 

 Offices. Suitable for a family wishing to spend a few months in the 

 country. Terms moderate.— Apply X!V., care of Nature Office, 29, 

 Bedford Street, Strand. 



ST. THOMAS'S HOSPITAL, ALBERT 

 EMBANKMENT, S.E. 



The WINTER SESSION, 1879-80, will commence nn OCTOBER ist. 



TWO ENTRANCE SCIENCE SCHOLARSHIPS of £60 and £ao, 

 OPEN to all First Year's Students, without the condition of their having 

 first entered as Students of the Hospital, will be awarded in the first week oc 

 October. Subjects : Chemistry and Physics, with either Botany or Zoology, 

 at option. SPECIAL CLASSES for the PRELIMINARY SCIENTIFIC 

 of University of London, with Practical Work in Laboratories and Museums, 

 iir« to be held from October to July, and for the ist M.B. from January to 

 July. 



Several Medical Practitioners In the neighbourhood receive Students for 

 residence and supervision, and a register of mspccted and approved lodgings 

 is kept in the Secretaiy's office. 



Prospectus and all particulars may be obtained from the Secretary, Dr. 

 GiLLBSi'is, at the Hospital. 



W. M. CRD, M.D.. Dean. 



EQUATORIAL TELESCOPE for SALE, 



very cheap. — 3I object-glass, several eye-pieces, finder, rackwork stand, 

 unusually strong, perfect condition. — Address Astra, care of the Pub- 

 Ushers of Nature. 39, Bedford Street, Strand, W.C. 



DUNHEVED COLLEGE (LIMITED), 



LAUNCESTON, CORNWALU 

 S«Ten hours from Lond»n. SErARATK Bedrooms. Systematic Teaching 

 in Science, Forhign Languages, and University Courses. 

 Caiendar pott free from 



The PRiNcifAL-EENJAMIN RALPH, LL.B. Dob. 



MINERALOGY AND GEOLOGY. 



A New List of Collections of Fossils, Minerals, and Rocks n»w ready, 

 including Special Collections to illustrate the various Text-books, m 

 Cabinets. List of Sections of Rocks for the Microscope Blowpip* Appa- 

 ratus and Materials of all kinds in Cases or separately. New Patterns o£ 

 Gvological Hammers, with prices. List of N«w and Second-kand Books of 



JAMES R. GREGORY, 



MUSEUM OF GEOLOGY. 



88, CHARLOTTE STREET, FITZROY SQUARE. 



