XVill 
NATURE 
[May 21, 1885 
THE MASON SCIENCE COLLEGE, 
BIRMINGHAM. 
APPOINTMENT OF PROFESSOR OF MINING. 
The Council invite Applications, on or before JUNE 24 next, for the 
above appointment, which is now vacant. 
By a Resolution of the Council, Candidates are especially requested to 
abstain from canvassing. 
Information as to the Terms and Conditions of the Appointment will be 
forwarded on application to 
GEORGE H. MORLEY, Secretary. 
ROYAL GEOGRAPHICAL SOCIETY. 
The Anniversary Meeting will be held (by permission of the Chancellor 
and Senate) in the Hall of the University of London, Burlington Gardens, 
on MONDAY, June 8, at half-past 2 p.m., the Right Hon. Lord ABERDARE, 
President, in the Chair. 
The Dinner will take place at Willis’s Rooms, King Street, St. James's, 
at 7 p.m. on the same day. 
The Right Hon. Lord ABERDARE, President, in the Chair. 
Dinner Charge, 21s., payable at the door; or Tickets may be had and 
Tee taken at 1, Saville Row, Burlington Gardens, up to noonon Saturday, 
une 6. 
The Friends of Fellows are admissible to the Dinner. 
NOTICE OF REMOVAL. 
Prof. P. MARTIN DUNCAN, F.R.S., has removed to 6, Grosvenor 
Road, Gunnersbury, Middlesex. 
MEMORY and SUCCESS.—What contri- 
butes to success? A good memory.—What causes failure in life? A 
oor memory.—What can all obtain from Prof. Loisette’s DIS- 
COVERIES? A good memory—THE PHYSIOLOGICAL ART OF 
NEVER FORGETTING—using none of the ‘‘Links,” ‘ Pegs,” 
‘*Localities,” or ‘‘ Associations” of Mnemonics, Lost memories re- 
stored—the worst made good, and the best better. Avy book learned in 
one reading. Prospectus POST FREE giving opinions of Mr. 
RICHARD A. PROCTOR, Dr. ANDREW WILSON, and others 
who have studied the System. A Day Class in Never Forgetting and 
for Cure of Mind-Wandering commences every Monday at 3 p.m. An 
Evening Class every Tuesday at 8 p.m. Lectures in Families of the 
Nobility; also taught thoroughly by POST. Prof. LOISETTE, 37, 
New OxrorpD STREET (opposite Mudie’s) W.C. 
PATERSON & COOPER. 
76, LITTLE BRITAIN, LONDON, E.C. 
Electric Light and Power and Telephone Engineers, 
New Electric Light Catalogue, post free 1s- 
PATERSON & COOPER beg to give notice that they have disposed of 
the Philosophical, Educational, and Experimental Part of their Business to 
Messrs. J. and T. MAYFIELD, 41, Queen Victoria Street, E.C. 
SCIENCE AND ART DEPARTMENT 
50 PER CENT. GRANT FOR THE PURCHASE OF STANDARD 
COLLECTIONS AND APPARATUS FOR TEACHING GEOLOGY 
AND MINERALOGY. NEW LISTS and FORMS on which the 
Application is to be made supplied by 
THOMAS J. DOWNING, 
Geologist, &c., 
38, WHISKIN STREET, LONDON, E.C. (over Quarter of a Century). 
C. D. AHRENS. 
PRISM WORKER AND PRACTICAL OPTICIAN, 
36, GREAT RUSSELL STREET, LONDON, W.C. 
SPECIAL NOTICE—See the New Polarising Prism. 
Can be used over any A & B Eyepiece. Strongly recommended for Lantern 
Work; will take in any Object. Also see the New Erecting Microscope. 
Any Object-Glass and any Eyepiece can be used withit. Itis the only way 
of seeing the Objects in their right shape and form. Maker of the Largest 
Nicol Prisms in existence for the Late W. Spottiswoode, Esq., P.R.S., &c., 
&c., and for Frank Crisp, Esq., LL.B., B.A., &c., &c. 
TRADE SUPPLIED WITH PRISMS. 
HOW & COW’S 
Geological Transparencies for the Lantern, 
Descriptive Catalogue on Application. 
WALKER’S SPECIFIC GRAVITY BALANCE FOR ROCKS 
AND MINERALS. 
HOW & CO.’S POCKET MICROSCOPE LAMP, 8s. 6d. 
MICRO-PETROLOGY.—Sections of Pitchstones, Obsidians, Granites, 
Syenites, Diorites, Gabbros, Dolerites, Basalts, Tachylites, ‘lrachytes, 
Andesites, Porphyrites, Rhyolites, Lavas, Ashes, Gneiss, Schists, Lime- 
stones, &c., price 1s. 6d. each, 
JAMES HOw & CO., 73, FARRINGDON STREET, LoNnpon. 
LIVING SPECIMENS FOR THE MICROSCOPE. 
GOLD MEDALawarded at the FISHERIES EXHIBITION te 
THOMAS BOLTON, 57, NEWHALL STREET, BIRMINGHAM. 
who has last week sent to his subscribers Uroglena volvox, with drawing 
and description. He has also sent out Paludicella Ehrenbergi, Syncoryne 
frutescens, Melicerta ringens, Rhinops vitrea, Conochilus volvox, Hydro- 
dictyon utriculatum, Volvox globator with Notommata parasita, Lophopus 
crystallinus ; also Amceba, Vorticella, Hydra, Crayfish, and other Specimens 
for (Huxley and Martin’s) Biological Laboratory work. 
Weekly Announcements will be made in this place of Organisms T. B. is 
supplying. 
Specimen Tube, One Shilling, post free. 
Twenty-six Tubes in course of Six Months for Subscription of £1 15., 
or Twelve Tubes for 105. 6d. 
Portfolio of Drawings, Ten Parts, 1s. each. 
EDWARD WARD has pleasure in an- 
nouncing the issue of a new Micro-Slide of Zoophyte, with tentacles 
out, in the special manner so well known to his numerous patrons. 
s. ad 
Plumularia similis ws oe (post-free) 2 8 
Also, quite new = 
Gorgonia verrucosa (polype stained) .,, 22 
Podalirus typicus (Spectre Shrimp) *A I 2 
EDWARD WARD, 249, OXFORD STREET, MANCHESTER. 
ANTERN READINGS.—DISSOLVING 
VIEWS. | 
THE NEW QUADRUPLICON. 
New Season, 1884 and 1885.—Popular Subjects for this Season. 
The Channel Islands—The War in the Soudan—The River Thames— 
Devonshire Scenery—Hereford and the River Wye—The English Lakes— 
London Poor and How They Live—Egypt and the Nile Expedition—Nor- 
way—The Lifeboat—The Signal Box—The Maids of Lee—Poor Pa’s 
Trousers—Shadows on the Blinds, &c. - 
The largest and newest Stock of Lanterns and Slides, Scientific and 
General, on Hire and Sale in this country at the Lowest Prices. 
E. MARSHALL, 78, Queen Victoria Street, London, E,C. 
INTERNATIONAL HEALTH EXHIBITION. 
DIVISION—EDUCATION. 
A PRIZE MEDAL AWARDED TO 
THOMAS D. RUSSELL, 
78, NEWGATE STREET, LONDON, E.C., 
For Geological Collections for Science Teaching. 
Catalogues Post free. 
MINERALOGY AND GEOLOGY. 
Mr. HENSON’S Latest Arrivals are :— 
Very Fine DOUBLY-TERMINATED CRYSTALS of ZIRCON, 
33 inches long, 1} square; BERYLS, DIOPTASE, UWAROWITE, 
WALUEWITE, NATIVE SILVER, HERDERITE, Very Brittiant 
RUTILES, CHALCOSIDERITE, and NATIVE COPPER, Corn- 
wall; POLISHED JADE and GREEN AVENTURINE. GROUPS 
and SINGLE CRYSTALS of STIBNITE, Japan; ““SHERRY” 
COLOURED TOPAZES, Siberia. 
A Large Series of ROCKS, also MICROSCOPIC SECTIONS of the 
same. 
Lists on Application Hammers, Chisels, and Hammer Straps. 
PRIVATE LESSONS AND EVENING CLASSES. 
BLOWPIPE CASES AND APPARATUS. _ Catalogues free. 
SAMUEL HENSON, 
277, STRAND, LONDON, 
Opposite Norfolk Street. 
FOR THE STUDY OF COMPARATIVE 
ANATOMY.—Marsupial An mals of both Sexes, preserved in Spirits 
of Wine. For price and particulars apply to the Importer, A. H. 
JamRacu, 355, East India Road, London, E. 
SIX PRIZE MEDALS 
AWARDED FOR GEOLOGICAL COLLECTIONS. 
Geological Collections especially adapted for Teaching as supplied to Science 
and Art Department, and used by all Lecturers and Teachers in 
Great Britain, &c. f E 
New and Rare Minerals constantly arriving from all parts for selection of 
Single Specimens. 
ROCK SECTIONS AND ROCK SPECIMENS: 
The Largest Variety in England. 
New Catalogues and Lists onapplication to— 
JAMES R. GREGORY, 
88, CHARLOTTE STREET, F1ITZROY SQUARE, LONDON. 
Established 27 Years in London. 
