Note: - "From the Philosophical transactions."
- "Read before the Royal Society, April 1, 1819" -- p. [1].
- ULL copies are from the library of Augustus De Morgan.
- ULL copy at [DeM] L0 (B.P.16) is no. 2 in bound vol. of 24 mathematical tracts by Babbage and others, 1754-1849. De Morgan's list of contents pasted at front of vol.
- DOI: 10.1163/9789004460409_MOR2-b29498028