Charles S. Peirce 
Mathematical Miscellanea. 1 [PDF ebook] 

Frontmatter — INTRODUCTION TO VOLUME 3 — CONTENTS — 1 [ELEMENTS OF TRIGONOMETRY] — 2 MULTITUDE AND QUANTITY — 3 PROBABILITY — 4 FINITE DIFFERENCES — 5 BOOLIAN STUDIES — 6 LOWELL LECTURES, 1903 — 7 EXISTENTIAL GRAPHS — 8 THE FOUR-COLOR PROBLEM — 9 MAP PROJECTION — 10 LINEAR ALGEBRA AND MATRICES — 11 POLITICAL ECONOMY — 12 AMAZING MAZES — 13 LOGIC MACHINES — 14 MEASUREMENT — 15 NON-EUCLIDEAN GEOMETRY — 16 APPLICATION OF MATHEMATICS — 17 N-VALUED LOGIC