School and Industrial Hygiene |
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Page 49
... inches , and at all intervening distances down to four inches : this is a very moderate test for young eyes . Any child who cannot read it as far as fifteen inches off should have his eyes examined by a competent oculist . No disease is ...
... inches , and at all intervening distances down to four inches : this is a very moderate test for young eyes . Any child who cannot read it as far as fifteen inches off should have his eyes examined by a competent oculist . No disease is ...
Page 53
... to approach nearer than fifteen inches in general to the book or slate . The proper shape and proportion of a desk which will facilitate the fulfilment of these requisitions will be described 5 * CARE OF THE EYES . 53.
... to approach nearer than fifteen inches in general to the book or slate . The proper shape and proportion of a desk which will facilitate the fulfilment of these requisitions will be described 5 * CARE OF THE EYES . 53.
Page 54
... inches . " Without any optical or other discoverable reason , or , perhaps , merely in consequence of a careless and lounging way of sitting , young people often acquire the vicious habit of reading with the book held close to the eyes ...
... inches . " Without any optical or other discoverable reason , or , perhaps , merely in consequence of a careless and lounging way of sitting , young people often acquire the vicious habit of reading with the book held close to the eyes ...
Page 57
... inches . The type is so minute that it had to be destroyed after use , owing to the impossibility of distributing it ; and several work- men had to stop working on it on account of the injury it caused . Pale ink and greasy slates are ...
... inches . The type is so minute that it had to be destroyed after use , owing to the impossibility of distributing it ; and several work- men had to stop working on it on account of the injury it caused . Pale ink and greasy slates are ...
Page 60
... inches , with no distinct perception of objects at a greater distance , has a marked tendency to pro- duce habits of introspection and reverie , and of in- attention to outward things , which may lay the foun- dation of grave defects of ...
... inches , with no distinct perception of objects at a greater distance , has a marked tendency to pro- duce habits of introspection and reverie , and of in- attention to outward things , which may lay the foun- dation of grave defects of ...
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adult allowed Amherst College amount Astigmatism attend Aurist better body boys brain causes cent CHAPTER chest chil child classes Cloth danger deformity desk-lid Diphtheria disease distance dren duty dyspepsia edge Edition Edwin Chadwick effect excessive exercise eyes fact fatigue feet foot-rest fresh air girls give gymnastics habit Health Primers heat height Hospital Hygiene Illustrations inches injury Jefferson Medical College labor large number light lumbar vertebræ Manual meals Medical College mental mind muscles myopia near-sight Nurses objects Obstetrics oculist person Philadelphia physician play poisonous position practical prevent Professor public schools pupils rest retina Rush Medical College scholars SCHOOL-DESKS AND SEATS school-life school-rooms shoulder-joint shoulders sitting sleep spinal curvature spine suitable teach teacher tendency thing three hours tion University of Pennsylvania ventilation vigorous women writer's cramp writing young
Popular passages
Page 134 - A child, young person, or woman, shall not be allowed to work between the fixed and traversing part of any self-acting machine while the machine is in motion by the action of steam, water, or other mechanical power.