A new treatise on astronomy, and the use of globes : in two parts ... (1866)
M'Intire, James, 1799-1879 · New York : Published by A.S. Barnes & Burr ... · leaf 55
s eye. But sincethe number of strata infinite, or whichis the same thing, thedensity of the atmos-phere gradually in-creases, by infinitelysmall degrees, from ato the surface, thenumber of deflections■w ill be infinite, andthe broken line a 6 c Ewill become a curveconcave towards theearths surface.… … 48. W>ien doea a ray of light become refracted, and towards what fTowards what will the rays of light be gradually refracted, in passingthrough the different strata of the atmosphere ? Draw the diagram, and KEFRACTION. 49 e S, and the angle S E S will be the increase in altitudeproduced by…
Astronomy
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