The Sight and how to Preserve it |
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Page 19
... nearly useless , but that they may finally get so sensitive and irritable that ordinary daylight can- not be borne without pain and discomfort . When weak sight has been allowed to progress for years , it sometimes becomes so severe ...
... nearly useless , but that they may finally get so sensitive and irritable that ordinary daylight can- not be borne without pain and discomfort . When weak sight has been allowed to progress for years , it sometimes becomes so severe ...
Page 31
... nearly closing the eyelids , so as to allow the rays of light to enter the pupil through a small aperture . A quick and more certain mode of detecting near - sight is to put a pair of weak concave glasses before the eyes , which at once ...
... nearly closing the eyelids , so as to allow the rays of light to enter the pupil through a small aperture . A quick and more certain mode of detecting near - sight is to put a pair of weak concave glasses before the eyes , which at once ...
Page 32
... nearly twenty feet distance . Those for reading should be the weakest with which he can read the fine type on page 22 at twelve inches from the eye . Weak and painful sight in adults due to near - sight is to be relieved by rest of the ...
... nearly twenty feet distance . Those for reading should be the weakest with which he can read the fine type on page 22 at twelve inches from the eye . Weak and painful sight in adults due to near - sight is to be relieved by rest of the ...
Page 33
... nearly as well , as ever ; but in near vision , the accommoda- tive power being necessary and not being available vision is imperfect . The loss of the accommodative power is not from disease of the eye at all , but is owing chiefly to ...
... nearly as well , as ever ; but in near vision , the accommoda- tive power being necessary and not being available vision is imperfect . The loss of the accommodative power is not from disease of the eye at all , but is owing chiefly to ...
Page 34
... nearly flat , as if the eye were fixed for distance , and the rays of light are not focussed ; while in Fig . D the lens is made full or convex by the exercise of the adjusting power , so that the rays of light are properly brought to a ...
... nearly flat , as if the eye were fixed for distance , and the rays of light are not focussed ; while in Fig . D the lens is made full or convex by the exercise of the adjusting power , so that the rays of light are properly brought to a ...
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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