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To avoide the tediouse repetition of these woordes: is equalle to: I will settle as I doe often in woorke use, a paire of paralleles, or gemowe [twin] lines of one lengthe: =, bicause noe .2. thynges, can be moare equalle.
In G. Simmons, Calculus Gems, New York: McGraw Hill Inc., 1992.
Logarithms: The Early History of a Familiar Function
Caulfield, M.J. (2006). John Napier: His Life, His Logs, and His Bones. Retrieved on October 16, 2009 from http://mathdl.maa.org/mathDL/46/?pa=content&sa=viewDocument&nodeId=2331
Fauvel, J. (1995). Revisiting the history of logarithms. In F. Swetz, J. Fauvel, O. Bekken, B. Johansson, & V. Katz (Eds.), Learn from the masters! (pp. 39–48). Washington, DC: Mathematical Association of America.
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Katz, V.J. (1995). Napier's logarithms adapted for today's classroom. In F. Swetz, J. Fauvel, O. Bekken, B. Johansson, & V. Katz (Eds.), Learn from the masters! (pp. 49–55). Washington, DC: Mathematical Association of America.
Napier, J. (1614). Mirifici Logarithmorum Canonis descriptio, Eiusque usus, in utraque Trigonometria; ut etiam in omni Logistica Mathematica, Amplissimi, Facillimi, and expeditissimi explicatis. Edinburgi: Ex officima Andreae Hart Biblipoloae.
O'Connor, J. J., and E.F. Robertson, (1999). Henry Briggs. Retrieved April 20, 2010 from http://www-history.mcs.st-andrews.ac.uk/Biographies/Briggs.html
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Wright, E. (1616). A description of the admirable table of logarithms. Translated from J. Napier's Latin to English. London: Nicholas Oaks. Partial transcription: http://www.johnnapier.com/table_of_logarithms_001.htm
Clark, Kathleen M. and Clemency Montelle, "Logarithms: The Early History of a Familiar Function," Loci (June 2010), DOI: 10.4169/loci003495