Fergusson, John Coleman. **F 5123.27 Fergusson’s percentage unit of angular measurement, with loga- rithms; also a description of his percentage theodolite and per- centage compass. For the use of surveyors, navigating officers, civil and military engineers, universities and colleges. — London. Longmans, Green & Co. 1912. (8), xvii, 467 pp. Dia- grams. Tables. 25% cm., in 8s.
wT. \é This card was printed at the Boston &e Public Library, January 18, 1917. ~ L303 — Angles. — Decimal divisi gles. — Percentage unit. — Tables.
Mathematical.