I'm trying to find PDFs or hard copies of the following works from the dawn of calculus. Does anyone know where I could find English translations of them?
- Newton - De analysi per aequationes numero terminorum infinitas (1669)
- Leibniz - Nova Methodus pro Maximis et Minimis (1684)
I can't seem to find them (in any language) on Google or Amazon.
UPDATE: It appears you can buy an 8-volume set of Newton's works for about $100 per volume here: http://www.cambridge.org/us/academic/subjects/mathematics/historical-mathematical-texts/mathematical-papers-isaac-newton but unfortunately much of it is in Latin. I did find De analysi though - in Volume IV: http://books.google.com/books?id=AQ3tveOwseoC&pg=PR17&source=gbs_selected_pages&cad=3#v=onepage&q&f=false.
And here's the Leibniz work (in Latin again): http://books.google.com/books?id=FSM1AAAAIAAJ&dq=leibniz%20maximis&pg=PA220#v=onepage&q=leibniz%20maximis&f=false.
So now it only remains to find the books in English. I hope translations exist.
UPDATE #2: This site has a bunch of historical works available for download: http://gallica.bnf.fr/Search?ArianeWireIndex=index&p=1&lang=EN&q=Newton%2C+Isaac (Still mostly Latin, but some of the older stuff is in English too.)
Leibniz's Nova Methodus was translated into English in
A source book in mathematics, 1200–1800. Edited by D. J. Struik. Harvard University Press, Cambridge, Mass. 1969
See pages 271–281 there.
Also, I see that https://archive.org/ has not been mentioned yet so I thought I would post it. I found many historical works there that I have not found elsewhere.