St. Mark's rest : the history of Venice written for the help of the few travellers who still care for her monuments (1885)
Ruskin, John, 1819-1900 · New York : Lovell · leaf 423
in the same ratio that a m was shortened, and the tiaie divid-ing-point will be q in Fig. 80., fixed so that q p sliall be toQ p as a m is to a vi : a m, representing the real length of ad. But a m is therefore to a m as a c is to a b in Fig. 79. Therefore p q must be to p q ps a c is to a b. But p…
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