 | 1872 - 798 pages
...endurance (asthenopia). In order to prevent these evils, the light must be sufficiently strong, and fall on the table from, the left-hand side, and, as...have the book nearer to the eye than ten inches at least. Besides this, the book ought to bo raised 20° for writing, and about 40° for reading. Ordinarily,... | |
 | 1872 - 806 pages
...endurance (asthenopia). In order to prevent these evils, the light must be sufficiently strong, and fall on the table from the left-hand side, and, as...have the book nearer to the eye than ten inches at least. Besides this, the book ought to bo raised 20° for writing, and about 40" for reading. Ordinarily,... | |
 | Henry Mills Alden, Frederick Lewis Allen, Lee Foster Hartman, Thomas Bucklin Wells - 1873 - 968 pages
...endurance. To prevent these evils the light of the schoolroom should be sufficiently strong, and should fall on the table from the left-hand side, and, as far as possible, from above. The children should be obliged to sit straight, and not have the book raised nearer the eye than ten inches. In... | |
 | 1873 - 698 pages
...to make schools healthy. He says, "The light must be sufficiently strong and fall on the leftside, and, as far as possible, from above. The children ought to sit straight, and not to have the book nearer to the eye (where the sight is normal; than ten inches at the least. Besides... | |
 | Henry Kiddle, Alexander Jacob Schem - 1876 - 900 pages
...manner. The following is an important practical direction in this respect : •• The light must bo sufficiently strong, and must fall on the table from...the least. Besides this, the book ought to be raised 2(1" for writing, and about 40" for reading. — See FAIIKNKK, 27(6 Child tiixl t//n Di'sk. (See HYGIENE,... | |
 | Edward Robert Robson - 1877 - 472 pages
...diminution of endurance. How can these evils be prevented ? The light must be sufficiently strong, and fall on the table from the left-hand side, and, as...inches at the least. Besides this, the book ought to bo raised 20° for writing and about 40° for reading." The question of lighting has been much discussed... | |
 | Richard Liebreich - 1878 - 24 pages
...dimunition of endurance. How can these evils be prevented ? The light must be sufficiently strong, and fall on the table from the left-hand side, and, as...book ought to be raised 20° for -writing, and about 40° for reading. Are these rules attended to in English schools ? I have, in order to find an answer... | |
 | Nashville (Tenn.). Board of Health - 1879 - 398 pages
...evils be prevented? The light must be sufficiently strong, and fall on the table from the left hand side, and, as far as possible, from above. The children...the least. Besides this, the book ought to be raised twenty degrees for writing, and about forty degrees for reading. The proper light is most easily obtained... | |
 | 1879 - 398 pages
...evils be prevented? The light must be sufficiently strong, and fall on the table from the left hand side, and, as far as possible, from above. The children...the least. Besides this, the book ought to be raised twenty degrees for writing, and about forty degrees for reading. The proper light is most easily obtained... | |
 | 1879 - 450 pages
...consideration. Mr. Liebreich's requirements are simple. The light must be ' sufficiently strong, and fall on the table from the lefthand side, and, as...have the book nearer to the eye than ten inches at least. Besides this, the book ought to be raised 20 deg. for writing, and about 40 deg. for reading.... | |
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The light must be sufficiently strong, and must fall on the table from the left-hand side, and, as far as possible, from above. The children ought to sit straight, and not have the book nearer to the eye than ten inches at the least. Besides this, the... 
