Show earth pictured round photographs taken during a stratosphere flight 01 of the na National 1 geographic society army air cons balloon explorer II 11 at an altitude 1 of feet above the earthly earths surface showing the lateral curva 1 i ture of the earth includes a stretch c h of the horizon miles in leq length this represents more than three degrees of a circle nearly early one of the total circumference of the earth I 1 the curve of the horizon was easily noticeable when the pictures was projected on a screen e n when W he 1 the edge of a r ruler le is 1 laii a la ab dona n the horizon line the curva is even more plainly visible |