But a#39;in-the figure pf, composed of the less circles, the three less circles ag, bb, ci, which answer to those three greater do ... could be seen from the prism through that hole; that is to the apparent magnitude of that T-hole viewed from the prism.
Title | : | A Compleat System of Opticks in Four Books, Viz. |
Author | : | Robert Smith |
Publisher | : | - 1738 |
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