Note: - "From the Transactions of the Cambridge Philosophical Society, vol. XI. part I."
- ULL copies are from the library of Augustus De Morgan. Copy at [DeM] L0 (B.P.41) has his note on t.p. ("Recd Nov. 13/65") and annotations within text.
- ULL copy at [DeM] L0 (B.P.41) has ALS from Moritz Wilhelm Drobitz to Augustus De Morgan, 16 May 1868, enclosing ALS from Friedrich Zarncke to Drobitz, 16 May 1868, tipped on t.p. verso (both letters in German). Extract from sale catalogue for Stifel's Deutsche Arithmetica (1545) pasted on p. 1, annotated by De Morgan. MS. paper by De Morgan, "Addition to a paper 'On the early history of the signs + and -" (3 sheets) tipped in at end.
- ULL copy at [DeM] L0 (B.P.41) is no. 8 in bound vol. of 10 tracts, chiefly by De Morgan, 1859-1869.
- DOI: 10.1163/9789004460409_MOR2-b29499227