De Morgan, Augustus.
Schroen, Ludwig. *#E 5011.57 Seven-figure logarithms of numbers from 1 to 108000 and of sines [etc.| to every 10 seconds of the quadrant, with a table of proportional parts, 5th ed. Description of tables by A. De Morgan. Lond. Vieweg. 1865, ix, (1), 474, 76 pp. 8°.