l NATURE 
[ Fune 18, 1885 
VICTORIA UNIVERSITY. 
UNIVERSITY, COLLEGE, MIVERPOOL: 
PROFESSORSHIP OF ENGINEERING. 
Applications are invited for a new Chair of Engineering, Salary 4375 
a Year, together with two-thirds of the Fees derived from Students. The 
Professor will be required tocommence work at the beginning of OCTOBER 
next 
Applications with Copies of Testim:nials to be sent not later than JULY 5 
to the College Registrar, who will supply full particulars on inquiry. 
UNIVERSITY COLLEGE OF SOUTH 
WALES AND MONMOUTHSHIRE. 
An ASSISTANT LECTURER in MATHEMATICS will be AP- 
POINTED in SEPTEMBER (Stipend, 4100 per annum). Candidates 
must send in applications, with testimonials and references, not later than 
AUGUST 27. 
For further information apply to 
Cardiff, June r2, 1885. 
IVOR JAMES, Registrar. 
UNIVERSITY COLLEGE, BRISTOL. 
PROFESSORSHIP OF EXPERIMENTAL PHYSICS. 
DEMONSTRATORSHIP OF EXPERIMENTAL PHYSICS. 
The COUNCIL invite Applications for the Chair of Experimental 
Physics ; Salary £300, with a Share of the Students’ Fees. Also for the Post 
of Demonstrator ; Salary £75. Applications, with Testimonials, to be sent 
not later than JUNE 25. 
For further information apply to 
ALFRED E. STOCK, Registrar. 
CITY AND GUILDS OF LONDON 
INSTITUTE. 
CENTRAL INSTITUTION. 
Summer Courses of Lectures and Laboratory Instruction for TECHNI- 
CAL TEACHERS and others to be held in the Institute’s New Buildings 
in EXHIBITION ROAD. 
I. On the Teaching of GEOMETRY in its TECHNICAL APPLI- 
CATIONS— 
By Prof. O. Henrict, LL.D., F.R.S., commencing on Monday, June 22. 
II. On the TESTING of MATERIALS of CONSTRUCTION, 
with some Applications to the DESIGN of MACHINERY— 
By Prof. W. C. UNWIN, M.1.C.E., commencing on Monday, July 6. 
III. On the Teaching of ELECTRICAL ENGINEERING— 
By Prof. W. E. Ayrton, F.R.S., commencing on Monday, July 20. 
Courses IT. and III., consisting of Lectures and Laboratory Instruction, 
will be illustrated by one or more DEMONSTRATIONS in the Inter- 
national INVENTIONS Exhibition. 
Each of the above Courses will extend over two weeks, from 10 till 5 daily, 
Saturdays excepted. 
IV. CARRIAGE BUILDING— 
Three Lectures by G. A. Tururr, Esq., on June 29 and 30, and July 2, at 
7 p-m. 
V. PLUMBING—~* 
Four Lectures, with Demonstrations, by W. R. Macutre, Esq., on July 
6, 7, 9, and 10, at 7 p.m. 
Registered TEACHERS of the Institute may, on application to the 
Director, te acmitted to any of these Courses without payment of fees. 
For further details, and for Syllabuses of the several Courses, apply at 
Gresham College, E.C., or at Exhibition Road, S.W. 
PHILIP MAGNUS, Director and Secretary. 
WANTED, ARTICLES for PERIODICAL 
on Botany, Geology, and Astronomy.—Letter to J. A. C., Presford 
House, Derrington, near Stafford. 
HOW & CO.’S 
Geological Transparencies for the Lantern, 
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WALKER’S SPECIFIC GRAVITY BALANCE FOR ROCKS 
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HOW & CO.’S POCKET MICROSCOPE LAMP, 8s. 6d. 
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LIVING SPECIMENS FOR THE MICROSCOPE. 
GOLD MEDAL awarded at the FISHERIES EXHIBITION to 
THOMAS BOLTON, 57, NEWHALL STREET, BIRMINGHAM. 
who has last week sent to his subscribers Chzxtogaster Limnai, with 
drawing and description. He has also sent out Leptodora hyalina, Lo- 
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Asplanchna Ebbesbornii, Nais hamata, Hydrodictyon utriculatum ; also 
Hydra, Vorticella, Amoeba, Crayfish, and other Specimens for (Huxley and 
Martin’s) Biological Laboratory work. 4 F 
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 1.5 
or Twelve Tubes for 10s. 6a. 
Portfolio of Drawings, Ten Parts, rs. each. 
MINERALOGY AND GEOLOGY. 
PROFESSORS, COLLECTORS and VISITORS to LONDON are 
INVITED to INSPECT Mr. HENSON’S STOCK of CHOICE MINE- 
RALS, &c., &c. At the PRESENT TIME he has a PARTICULARLY 
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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. 
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In Continuous Lengths, without Joints, assupplied by themto HerMajesty’s 
Government and the Colonies ; the Italian Government, the Argentine Re- 
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The Jury Commission, acting on the Reports of the International Juries of 
the Health Exhibition, have awarded a Bronze Medal in Class 26 to Messrs. 
SanvErson & Co. for their Solid Copper Tape Lightning Conductors in 
Continuous Lengths, without Joints, and of High Conductivity Copper. 
LEADENHALL HOUSE, ror, LEADENHALL STREET, E.C. 
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Cc. D. AHRENS, 
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SPECIAL NOTICE—See the New Polarising Prism. 
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