Several ditto marks („) and abbreviations (Do.) have been replaced with the dittoed text.
Some minor obvious typographical and punctuation errors have been corrected silently.
Various pages: Frobël has been changed to Fröbel.
Page 11: Erdknude has been changed to Erdkunde (2×).
Page 43: Greard has been changed to Gréard.
Page 81: “in despite of” has been changed to “in spite of”.
Page 107: “which he puts most dearly and forcible” has been changed to “which he puts most clearly and forcibly”
Page 108, second » inserted after “instructed on the old method.»”
Page 201: “Essays of Ella” has been changed to “Essays of Elia”.