Autograph letter signed from Colin Maclaurin, principally on fluxions, 12 May 1738

Autograph letter signed from Colin Maclaurin addressed to James Stirling "at Leadhills", dated 12 May 1738, principally on fluxions ("I am persuaded many things are wanting in the inverse methods of fluxions especially in what relates to fluents that are not reduced and perhaps are not reduced to the logarithms or circle. I give a chapter on these, distinguish them into various orders, and shew easy constructions of lines by whose rectification they may be assigned"), citing the work of Cotes and de Moivre, with 3 small mathematical diagrams.