The Sight and how to Preserve it |
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Page 7
... mean , what pain and fatigue mean , and why the eye is so often subject to fatigue and pain . We cannot afford to give up the entire use of our eyes because they ache , nor can we afford wholly to disregard ominous symptoms lest we run ...
... mean , what pain and fatigue mean , and why the eye is so often subject to fatigue and pain . We cannot afford to give up the entire use of our eyes because they ache , nor can we afford wholly to disregard ominous symptoms lest we run ...
Page 18
... means of the muscular adjusting power , or what we call the accommodative power . Notice in this figure that the lens ( L ) is more convex or full than in the other figures . This gives the eye a greater focal power ; just exactly what ...
... means of the muscular adjusting power , or what we call the accommodative power . Notice in this figure that the lens ( L ) is more convex or full than in the other figures . This gives the eye a greater focal power ; just exactly what ...
Page 29
... GLASSES . To render vision clear in near - sight , it is of course necessary to resort to some means by which the rays of light may be prevented from being focussed too quickly after entering the pupil . That is. NEAR - SIGHT . 29.
... GLASSES . To render vision clear in near - sight , it is of course necessary to resort to some means by which the rays of light may be prevented from being focussed too quickly after entering the pupil . That is. NEAR - SIGHT . 29.
Page 34
... means the FIG . C. calling into action of the muscle of accommodation ( M A , Fig . A , p . 9 ) . This action results in making the lens more convex , as seen in Fig . D ( p . 35 ) . As the lens gets harder with advancing age , this ...
... means the FIG . C. calling into action of the muscle of accommodation ( M A , Fig . A , p . 9 ) . This action results in making the lens more convex , as seen in Fig . D ( p . 35 ) . As the lens gets harder with advancing age , this ...
Page 37
... straining the accom- modative power of the eyes , and so causing weak sight . OLD SIGHT DOES NOT MEAN OLD AGE . In these days of weak sight and eye - glasses there need be no fear that the adoption of glasses OLD SIGHT . 37.
... straining the accom- modative power of the eyes , and so causing weak sight . OLD SIGHT DOES NOT MEAN OLD AGE . In these days of weak sight and eye - glasses there need be no fear that the adoption of glasses OLD SIGHT . 37.
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Common terms and phrases
30 Coloured Plates accommodative power adjusting power BOTANY BRITISH BIRDS BRITISH BUTTERFLIES brought cataract cinder cloth extra cloth gilt Coloured Figures concave glasses Containing convex glasses Crown 8vo Demy 8vo Descriptions disease distant objects Enlarged enter the eye eye-ball eye-glasses fatigue Fcap FERNS Figures of Eighty FLOWERING PLANTS FLOWERS focus focussing power Fourth Edition HARDWICKE & BOGUE Health HENRY POWER Illustrated with 32 Illustrated with numerous inches J. E. TAYLOR JARDINE Larvæ Lecture lens London look MANUAL Marsupialia MICROSCOPE MORTIMER GRANVILLE muscle of accommodation muscle of convergence myopia NATURAL HISTORY NEAR-SIGHT IN CHILDREN noticed numerous Illustrations numerous Woodcuts oculist old sight pain Piccadilly Plain and Easy Plants PROGRESSIVE NEAR-SIGHT pupil Quarterly R. A. PROCTOR rays of light reach the retina reduced price 16s regard near objects Science Gossip Second Edition seen in Fig Sir WILLIAM JARDINE Species super-royal 8vo Third Edition tion tissues upper lid Vols weak sight Woodcuts
Popular passages
Page 26 - BONAPARTE. NEW AND ENLARGED EDITION, completed by the insertion of above One Hundred Birds omitted in the original Work, and Illustrated by valuable Notes, and Life of the Author, by Sir WILLIAM JARDINE. Three...
Page 51 - The educational abomination of desolation of the present day is the stimulation of young people to work at high pressure by incessant competitive examinations. Some wise man (who probably was not an early riser) has said of early risers in general, that they are conceited all the forenoon and stupid all the afternoon.
Page 15 - A PLAIN and EASY ACCOUNT of BRITISH FERNS. Together with their Classification, Arrangement of Genera, Structures, and Functions, Directions for Out-door and Indoor Cultivation, &c. Numerous Coloured Illustrations. A New Edition in preparation.
Page 28 - SCIENCE GOSSIP: An Illustrated Medium of Interchange and Gossip for Students and Lovers of Nature. Edited by JE TAYLOR, Ph.D., FLS, FGS, &c.
Page 11 - By HERBERT FRY. Showing, in alphabetical order, their Name, Date of Foundation, Address, Objects, Annual Income, Chief Officials, &c.
Page 9 - THOMAS, THE PREPARATION and MOUNTING of MICROSCOPIC OBJECTS. New Edition, greatly Enlarged and brought up to the Present Time by JOHN MATTHEWS, MD, FRMS, Vice-President of the Quekett Microscopical Club. Fcap. 8vo, cloth, 2s.
Page 22 - Drawing of every British Plant. Edited and brought up to the Present Standard of Scientific Knowledge by T. BOSWELL (formerly SYME), LL.DFLS, &c. With Popular Descriptions of the Uses, History, and Traditions of each Plant, by Mrs. LANKESTEB, Author of " Wild Flowers Worth Notice," " The British Ferns,
Page 22 - FLS MUSHROOMS AND TOADSTOOLS: How to Distinguish easily the Difference between Edible and Poisonous Fungi. Two large Sheets, containing Figures of 29 Edible and 31 Poisonous Species, drawn the natural size, and Coloured from Living Specimens. With descriptive letterpress, 6s. ; on canvas, in cloth case for pocket, los.
Page 25 - Containing an Alphabetical List of the House of Lords, Dates of Creation, Lists of Scotch and Irish Peers, Addresses, &c. 32mo, cloth, is. Published annually. THE SHILLING BARONETAGE. Containing an Alphabetical List of the Baronets of the United Kingdom, Short Biographical Notices, Dates of Creation, Addresses, &c.
Page 18 - Man. INSECTS, 7 Vols. Introduction to Entomology, British Butterflies and Moths, 2 Vols., Foreign Butterflies and Moths, 2 Vols., Beetles, Bees. FISHES, 6 Vols. Introduction and Foreign Fishes, British Fishes, 2 Vols., Perch Family, Fishes of Guiana, 2 Vols. Fuller Details of these will be found under the authors