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achromatic achromatic lens angle of incidence aperture approximate focus approximate value axis caustic chromatic dispersion circle of aberration circle of confusion coefficient concave conjugate foci convex lens convexo-plane curvature direct pencil distance diverging pencil Edition ellipse equal equation excentrical pencils expression eye-glass eye-piece falling obliquely Fcap field-glass figure find the form focal length focal line incidence and emergence incident pencil latus rectum least circle lenses Let Q light luminous point meniscus microscope nearly negative object object-glass oblique aberration oblique pencil optical parabolic parallel incident rays pencil is incident pencil passes perpendicular plane plano-convex PM=y prism Prop quantity radius ray refracted reflected reflexion refracted pencil refracted rays refracting surface refractive index second approximation second surface secondary foci shews small pencil small term spherical mirror Substituting the values telescope thin lens tion triangles virtual image
Page 203 - HODGSON -MYTHOLOGY FOR LATIN VERSIFICATION. A brief Sketch of the Fables of the Ancients, prepared to be rendered into Latin Verse for Schools.
Page 209 - POPULAR ASTRONOMY. Containing How to Observe the Heavens. The Earth, Sun, Moon, Planets. Light, Comets, Eclipses, Astronomical Influences, &c. 182 Illustrations, 4*. 6d. THE BEE AND WHITE ANTS: Their Manners and Habits. With Illustrations of Animal Instinct and Intelligence.
Page 206 - From the Invention of Printing to the present time ; being Brief Notices of a large Number of Works drawn up from actual inspection.
Page 207 - CONTENTS:— The Planets; are they inhabited Worlds? Weather Prognostics. Popular Fallacies in Questions of Physical Science. Latitudes and Longitudes. Lunar Influences. Meteoric Stones and Shooting Stars. Railway Accidents. Light. Common Things. — Air. Locomotion in the United States.
Page 207 - Elementary Treatise on Optics. Part II. Containing the Higher Propositions, with their application to the more perfect forms of Instruments. 8vo.
Page 204 - ITALIAN. Smith's First Italian Course; being a Practical and Easy Method of Learning the Elements of the Italian Language. Edited from the German of FILIPPI, after the method of Dr. AHN. 12mo.
Page 208 - Popular Physics. Containing : Magnitude and Minuteness— Atmosphere— Thunder and Lightning — Terrestrial Heat— Meteoric Stones — Popular Fallacies— Weather Prognostics — Thermometer— Barometer — Safety Lamp — Whitworth's Micrometric Apparatus — Electro-Motive Power — Sound— Magic Lantern— Camera Obscura— Camera Lucida— Looking Glass — Stereoscope ^Science and Poetry. (From "The Museum of Science and Art.") With 85 Illustrations. 2s. 6d. cloth lettered. * Lardner's...
Page 208 - Containing : Air— Earth— Fire— Water— Time— The Almanack— Clocks and Watches— Spectacles — Colour— Kaleidoscope— Pumps— Man— The Eye — The Printing Press — The Potter's Art — Locomotion and Transport — The Surface of the Earth, or First Notions of Geography. (Prom "The Museum of Science and Art.") With 233 Illustrations.
Page 209 - Diagrams, coloured, 15s., illustrating the following subjects: 1 and 2. Composition of Forces.— 3. Equilibrium.— 4 and 5. Levers. —6. Steelyard, Brady Balance, and Danish Balance. — 7. Wheel and Axle.— 8. Inclined Plane.— 9, 10, 11. Pulleys.— 12. Hunter's Screw.— 13 and 14. Toothed Wheels — 15. Combination of the Mechanical Powers. WALTON AND MAHERLY. LOGIC. De Morgan's Formal Logic ; or, The Calculus of Inference, Necessary and Probable.