Eyesight and school life . carefully testingwith Webers photometer eighteen different textilematerials, he classes four of these as good (twoof the four being fine threaded white shirting, andstrong threaded white Dowlas, and the others,apparently, of thin threaded twill), two as middling(these are both thick linen striped), six as bad (oneof these is a thick cotton satin), and six as miser-able (one of these is a bright yellow impregnatedsail-cloth). Only the good materials should beused in school-rooms. Glass dulled on one sideby sand blowing, and grey uncoloured cathedralglass transmitted m
Eyesight and school life . carefully testingwith Webers photometer eighteen different textilematerials, he classes four of these as good (twoof the four being fine threaded white shirting, andstrong threaded white Dowlas, and the others,apparently, of thin threaded twill), two as middling(these are both thick linen striped), six as bad (oneof these is a thick cotton satin), and six as miser-able (one of these is a bright yellow impregnatedsail-cloth). Only the good materials should beused in school-rooms. Glass dulled on one sideby sand blowing, and grey uncoloured cathedralglass transmitted more light than any of thetextile materials. But the glass is costly and it isfragile, and, moreover, it is somewhat dazzling andcannot conveniently be put out of the way whennot,required. DESKS, AND SEATING OF SCHOLARS. The question of the posture and proper seatingof the children in school is a very important much more enlightened view is now entertainedon this subject than was the case not long ago. 28 EYESIGHT AND. To illustrate Fig. 6. distortion of Spine(Vide page 29.) from faulty posture. SCHOOL LIFE. 29 and its importance is becoming recognised. Asevidence of this may be mentioned that whereas atthe Paris Exhibition in 1867 there were only threeschool desks shown, at the last Exhibition no lessthan seventy-one were exhibited. A bad postureis not only injurious to eyesight, as will presentlybe demonstrated, but it is a fruitful source of,crooked spine. Eulenburg says that 90 per cent,of curvatures of spine, not induced by localdisease, are developed during school life, and ina school at Neuchatel among 381 girls, 156 werefound to have more or less deviation of the spinalcolumn. The manner in which the spine becomesdistorted is illustrated in the photograph {Fig. 6),of two boys who sat purposely in a bad positionwriting at a table too high for them. To makethe point which I desire to be illustrated moredistinct, the line of the spine was inked. The backless bench has
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Keywords: ., bookcentury1800, bookdecade1890, bookidcu3192403178, bookyear1895
