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Geology, Petrology, and Palaeo-Botany ASTON & MANDER, Ltd.

Hand Specimens and Micro-preparations of British and Foreign Rocks can be supplied at reasonable terms. Sections carefully cut and mounted from clien's' own specimens. Impressions and petrifactions of Coal-measure Plants, as well as preparations. a speciality. A selected series of Micropreparations illustrating Dr. Scott's "Studies in Fossil Botany" supplied at the shortest notice. Catalogues and terms on application to: THE LOMAX PALAEO-BOTANICAL Co., Ltd., 65, Starrcliffe Street, Great Lever, Bolton.

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THE "RIGID" SERIES

1809.

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OF DRAWING INSTRUMENTS.

SECOND-HAND LANTERNS. Oil, Limelight, Electric. SECOND-HAND LANTERN SLIDES, by all the Leading Makers. Also Regulators, Jets, Lenses, &c. SECOND-HAND TELESCOPES. 4" Wray Altazimuth, £22 10s. 3"

31" Wray Altazimuth, £16 10s. £17 10s. 3′ £14 Os. SECOND-HAND MICROSCOPES. Watson's Edinburgh Student, complete £16. Beck's Lar e London, complete £8 10s. Swift's Discovery, complete £5 15s. Watson's Standard, complete £5 10s. Lists on application. BROADHURST, CLARKSON & CO., 63 Farringdon Rd., London. (30 years at 28 Bartlett's Buildings.)

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ESTABLISHED 1851.

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Nature says: Should find its way into many observatories where an accurate instrument is required at a moderate cost. For the sum of £21 they supply a clock with a 10-inch dial, dead-beat escapement, and wooden rod seconds pendulum in a solid mahogany case, and after examining the instrument we have no hesitation in pronouncing it a marvel of cheapness."

E. DENT & CO., Ltd.,
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tory. Greenwich, and the Principal
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Only Addresses

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Fitted with the Improved Rigid Head Joint and Straight Bow
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Sales by Auction.
NATURAL HISTORY.

MESSRS. FOSTER respectfully announce for SALE BY AUCTION, at the GALLERY, 54 PALL MALL, On FRIDAY, OCTOBER 29, at 1 o'clock precisely, the First Portion of the Natural History Collection formed by the well-known naturalist Mr. R. F. DAMON, Weymouth, who intends to confine his business in the future to special sets of Fossils and to Coloured Casts and Models. This First Portion includes OLD RED SANDSTONE FISHES from SCOTLAND, CRETACEOUS FISHES from SYRIA, WENLOCK and other TRILOBITES, and many thousands of other Fossils from most formations, also Glazed Show Cases and Cabinets.

May be viewed two days prior to the day of Sale, when Catalogues may had of

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A Sale by Auction is held EVERY FRIDAY at 12.30, which affords first-class opportunities for the disposal or purchase of SCIENTIFIC AND ELECTRICAL APPARATUS, Microscopes and Accessories, Surveying Instruments, Photographic Cameras and Lenses, Lathes and Tools, Cinematographs and Fuus, and Miscellaneous Property.

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PROGRESSIVE REDEMPTION:

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The following are among the Articles which appeared in the Journal

for September :—

Sept. 2.-" Styles of the Ca'endar," by W. T. Lynn; “African Entomological
Research Committee," by F. A. D.; "The British Association at
Winnipeg. Section B.-Chemistry.—Opening Address (Abridged) by Prof.
H. E. Armstrong, Ph.D., LL.D., F.R.S., President of the Section. Section C.-
Geology. Opening Address by Arthur Smith Woodward, LL.D., F.R.S., V.P.Z.S.,
Sec. G.S., Keeper of Geology in the British Museum, President of the Section";
"The Seven Styles of Crystal Architecture," by Dr. A. E. H. Tutton, F.R.S.
Sept. 9.-" The Attainment of the North Pole" (with Map); "The Whiskey Com=
mission," by T.; "Prof. Emil Christian Hansen," by Arthur R. Ling:
"The British Association at Winnipeg. Section D.-Zoology.-Opening
Address by A. E. Shipley, M.A. Cantab., Hon. D.Sc. Princeton, F.R.S., President
of the Section. Section E.-Geography.-Opening Address by Colonel Sir
Duncan Johnston, K.C.M.G., C.B., R.E., F.R.G.S., F.G.S., President of the Section."
Sept. 16.-"The Approaching Opposition of Mars" (Illustrated), by William E. Rolston;
"Polar Expeditions and Observations"; "Chemistry in the Service
of the State,” by C. S.; “The British Association at Winnipeg. Section
G.-Engineering.-Opening Address by Sir W. H. White, K.C.B., Sc.D.,
LL.D., F.R.S., President of the Section"; "Our Food from the Waters," by
Prof. W. A. Herdman, F.R.S.

Sept. 23.—“ Explorations in Central Asia" (Illustrated); “The Sixteenth Inter-
national Congress of Medicine"; "The International Seismological
Association"; "Copenhagen Congress on the Testing of Materials of
Construction"; "German Botanical Congress," by T. J.; "The British
Association at Winnipeg. Section H. Anthropology. Opening
Address (Abridged) by Prof. John L. Myres, M.A., F.S.A., President of the Section.
Section I.-Physiology.-Opening Address by Prof. E. H. Starling, M.D.,
F.R.S., President of the Section."

Sept. 30.-" Magnetic Storm of September 25”; “Aviation” (Illustrated), by Prof.
G. H. Bryan, F.R.S.; "The Royal Observatory and Electric Tramways";
"Peter Barr"; "The Institute of Metals," by A. McWilliam; "The
British Association at Winnipeg. Section K.-- Botany. - Opening
Address by Lieut.-Colonel David Prain, C.I.E., LL.D., F.R.S., President of the
Section. Sub-section of K.—Agriculture.—Opening Address by Major P. G.
Craigie, C.B., F.S.S., Chairman of the Sub-section. (With Diagrams.)

C. Copies of either of the numbers can be sent post free by the publishers to residents in the British
Isles for 6 d. per copy, or to residents abroad for 7 d.; the September Part (containing all
the numbers) can be sent to any address in the British Isles for 2/10, or abroad for 3/2.
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