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TO H.R H. THE PRINCE OF WALES, THE EMPRESS OF GERMANY, &

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MACMILLAN AND Co., at 29 Bedford Street, London. W C., and 112 Fourib New Avenue. York.-THURSDAY, Decen ber 8, 18aa

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A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE.

" To the solid ground
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No. 1207, VOL. 47.]

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ALSO ne Light and Electric Lanterns, Projecting Microscopes, 'olariscopes, and Micro-Polariscopes of the highest quality.

New Catalogue, including List of Lantern Slides, 4d. "TICAL PROJECTION. By Lewis Wright. Second Edition. A Complete Guide to the Use of the Magic Lantern, the Lantern Microscope and Polariscope, and to the Projection of Scientific Experiments. ist Published by Longmans, 6s., net 4s. 6d., Post free, 4s. rod. NEWTON & CO., 3 FLEET STREET, LONDON.

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CARDIFF. LECTURE ARRANGEMENTS BEFORE EASTER,

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The Council is about to proceed to the Appointment of a PROFESSOR LECTURE HOUR, THREE O'CLOCK P.M.

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each case will be £350 per Annum. CHRISTMAS LECTURES.

Applications, together with Printed Copies of Testimonials, nust be

in on or before FEBRUARY 10, 1893. Sir ROBERT STAWELL BALL, M,A., LL.D., F.R.S., Lowndean Professor For further Particulars apply to of Astronomy and Geumetry in the University of Cambridge. Six Lectures

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The Office of ASSISTANT EXAMINER in ZOOLOGY has berc February 7, 14, 21, 28; March 7, 14, 21. One Guinea the Course.

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chant, 12 Frith Street, Suho, W., has a very large assortment of Spe Professor of Nalural Philos phy, R.I.-Six Lectures on "Sound and

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NATURALIST,
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Ruby and other Varieties of Cassiterite on Quartz, Australia, Bee Scientific Authorities, whose Names are given in the Prospectus.

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HARVEY & PEAK,

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By Appointment to the Royal Iristitution of Great Britain.
56 CHARING CROSS ROAD, LONDON, W.C.

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ENT 99 HATTON CARDEN, LONDON. PERKEN, SON, & RAYMENT, THROAT AND COUGH

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FOR SALE.

SCIENCE INSTRUMENTS.

MALOCB

Fourth Edition, pp. 300, 55.

Now Ready at all the Libraries and Booksellers'. PROTOPLASM: Physical Life and Law. Medium Svo, Cloth, Price 21s. ; or Vellum, gilt top. 315. 61. By LIONEL BEALE, F.R.S.

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