Popular science monthly . 434 Popiilar Science Monihly. APPARLOWER Spacing of Strings Will Appear Differentto Each Eye When Head Is Tilted The Reason Why We Have Two EyesSpaced Apart IN the March issue of PopularScience Monthly there appeared anarticle explaining why we have two eyeswhich showed how the possession of twoeyes gives us stereoscopic vision. Tothis might be added the explanation ofanother important i)r()\ision of naturegrowing out of it, namely, why the eyesare spaced apart on a horizontal lineinstead of one above the other. If welook at several strings or wires spacedapart and ru
Popular science monthly . 434 Popiilar Science Monihly. APPARLOWER Spacing of Strings Will Appear Differentto Each Eye When Head Is Tilted The Reason Why We Have Two EyesSpaced Apart IN the March issue of PopularScience Monthly there appeared anarticle explaining why we have two eyeswhich showed how the possession of twoeyes gives us stereoscopic vision. Tothis might be added the explanation ofanother important i)r()\ision of naturegrowing out of it, namely, why the eyesare spaced apart on a horizontal lineinstead of one above the other. If welook at several strings or wires spacedapart and running horizontally acrossthe line of vision as, for examjile, a groupof telephone or telegrai)h wires stretchedhorizontally, they will appear to liein tile same i)lane and all the samedistance from the eyes, but upon tillingthe head to one side so as to bring theeyes one over the other, the wires willappear in their true relation to eachother and to the eyes. With two eyes our stereoscopic visionis limited to the dimensions runningparallel to the plan
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1872
