9-40ths

Updated: May 29, 2025

Yet the result is not quite worthy of the praise given to it by Professor Smyth. He himself, however, by much more exact observations, with an excellent altazimuth, reduced the alleged error from 20 minutes to only 4-1/2, or to 9-40ths of its formerly supposed value.

Richard A. (Richard Anthony) Proctor - Myths and Marvels of Astronomy