A system of natural philosophy, designed for the use of schools and academies (1845)
Moffat, J[ohn] M. [from old catalog] · Philadelphia, E. C. Biddle · leaf 343
That this effect must take place will be readily perceived fromthe preceding figure, which shows that the rays in passing throughthe opening must cross each other, and thus rays coming from thesuperior parts of objects, impinge on the relatively inferior portionof the plane, and those from the…
Physics
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