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- Lardner's Popular Astronomy. Second Series. Containinq :
Liglit— Comets— Cometary Iiifliieuces— Eclipses— Terrestrial 1,'otatiiin— Lui.ar Rotation— Ast.oiio- mical Instruments. (I'rom the "Museum of Science and Art.") 63 Illustrations. 2s., cloth lettered.
- Lardner on the Microscope. (From the " Museum of
Science and Art.") 1 vol. 147 Engravings. 2s.
- Lardner on the Bee and White Ants. Their Manners and
Habits ; with Illustrations of Animal Instinct and Intelligence. (From the " JIuscum of Science and Art.") I vol., with 135 Illustrations. 2s., cloth lettered.
- Lardner on Steam and its Uses ; including the Steam
Engine, the Locomotive, and Steam Navigation. (From the " Museum of Science and jVrt.") I vol. 89 illustrations. 2s.
- Lardner on the Electric Telegraphy Popidarised. With
100 Illustrations. (From the " Museum of Science and Art.") 12mo., 2'.0 pages. 2s. cloth lettered.
- Buff's Familiar Letters on the Physics of the Earth.
Treating of the chief Movements of the Land, the Waters, and the Air, and the forces that (rive rise to them. Edited by Dr. A. W. Hoffman, Professor in the Koyal College of Chemistry, London. Fcap. 8vo. 5s., cloth.
- A Guide to the Stars for every Night in the Year.
In Twelve Planispheres. With an Introduction. 8vo. Gs. Od., cloth. Bishop's Ecliptical Charts, Hours 0, 1, 2, 3, 4, 5, 7, 9, 10, 11, 13, 14, 19, 20, 21, 22,'.taken at the Observatoiy, Regent's Park. Price 2s. Gd. each. Bishop's Astronomical Observations, taken at the Ohserva- tory. Regent's Park, during the years 1839— IS.'il. 4to. 12s. Bishop's Synoptical Table of the Elements of the Minor Planets, between JLirs and Jupiter, as known at the beeinning of IS-i.i, with the particulais relating to their discovery, etc. ; arranged at the Observatory, Regent's Park. On a Slicet, Is.
- Minasi's Mechanical Diagrams. For the Use of Lecturers
and Schools. l.'J Sheets of Diagrams, coloured, 15s., illusfrafng the following subjects:- 1 and 2 Composition of Forces.-3. Equilibrium. - 4 and .^ Levers.-G. Steelyard and Brady lialance and Danish Balance.-?. Wheel and Axle.-8. Inclined Plane.-9, 10, 11. Pulleys.- 1 'A Hunters Screw —13 and 14. Toothed Wheels.— 15. Combination of the Mechanical Powers. LOGIC. De Morgan's Formal Logic. Or, The Calcidus of Inference, Necessary and Probable. 8vo. Gs. 6d. Boole's Investigation of the Laws of Thought, on u-hich arc founded the Mathematical Theories of Logic and Probabilities. 8vo. 14s., cloth.
- Neil's Art of Beasoninq : a Popular E.vposition of the
