" 6, line 15, for “universality” read “common or reciprocal nature.”
" 21, " 31, for “Σιδωλ” read “Ειδωλ.”
" 31, " 7, for “micrometre” read “micrometer.”
" 41, " 11, for “θαυμαξειν” read “θαυμαζειν.”
" 45, " 22, after “its” insert “iron.”
" 45, " 23, for “extend to” read “quench.”
" 48, " 31, for “λογιμον” read “λογικον.”
" 49, " 22, after “to” insert “abstract”.
" 50, " 14, after “function” insert “the construction of the concept.”
" 62, " 26, for “Kallisthenes” read “Callisthenes.”