This section contains naught but pure mathematics. The first subsection article "Applied Mathematics as an Art and as a Science" is by Maurice Anthony BIOT; it is followed by the mathematical articles from the Britannicas in a separate subsection. Next is an article from the Britannica on logarithms; and lastly and article on tensors.
Added 9/21/2025 is An Introduction to Projective Geometry by Arnold EMCH. His book has been augmented with addition references, etc., and appendixes. Please email any comments to mathrudiness@gmail.com.
This section is still being constructed.