Note: - "From the Philosophical Transactions -- Part II for 1851".
- ULL copies are from the library of Augustus De Morgan. Copy at [DeM] L0 (B.P.27) fol. has his list of contents of vol. in which it is bound pasted on front flyleaf. Copy at [DeM] L⁰ (B.P.22) has his list of contents pasted on reverse of first page of first item, 8 Oct. 1851.
- ULL copy at [DeM] L0 (B.P.27) fol. is no. 32 in vol. with binder's spine title: "Mathematical tracts". Bound to 29 cm.
- ULL copy at [DeM] L⁰ (B.P.22) is no. 32 of 33 mathematical tracts, ca. 1780-1851, in vol. with binder's spine title: "Mathematical tracts, 1851". Bound to 27 cm.
- DOI: 10.1163/9789004460409_MOR2-b29392731