Rough calculations and table of musical scales, by Sir John Frederick William Herschel Draft calculations and observation table for a measure of musical notes expressed in English scale (A, B, C...), in Herschel's hand. Following from previous item, top of page numbered uxi.3. Draft version of 1868 article "On Musical Scale" arguing for mathematical pitch, published in Quarterly Journal of Science. Written at the back of an envelopped marked to Sir J. F. W. Herschel from The Astronomer Royal. 19th century