American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 106
from any of theothers in the same path. This can be illus-trated if, in the following figure, we imagine the point E to bethe centre of theearth, while thelines exterior rep-resent the dif-ferent strata of theair. Let A be theobservers placeon the surfaceof the earth, andS some star onthe same… … observers eye at A, and appear in its realplace on the celestial sphere; but when itstrikes the air it is first deflected to t, andagain in a curved line, y V, to A. Now, thetangent of the last curve is the straiglit linein which the star will be apparently located;that tangent will be As, so that…
Clocks and watches
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![An illustration from L'optique divisée en trois livres : ou, l'On démontre d'une maniere aisée tout ce qui regarde 1. la propagation & les proprietez de la lumiere. 2. La vision. 3. La figure & la disposition des verres qui servent à la perfefectionner [sic] (1682)](https://img.insideoutlibrary.com/img/200/ia-loptiquedivise00ango-77-8.webp)
