p. ?? sqq. Reference “[II.]” is to Proposition II. of current book, amended to “[ii.]” (4 times).

p. ??. Prop V. header “subtended bg the homologous sides” in original, obvious error amended to “by”.

p. ??. Reference “[XVI.]” corrected to “[xvi.]”.

p. ??. “From the construction is is evident …” in original, obvious error amended to “it is”.

p. ??. “20. Find a poiat O” in original, obvious error amended to “point”.

p. ??. “the lines GH, GK each perpendiclar to EF” in original, obvious error amended to “perpendicular”.

p. ??. “O” when associated with a lower case letter was wrongly printed as o, which is not defined. These have been corrected (3 times).

p. ??. Reference “[VI., Cor. 6]” corrected to “[vi., Cor. 6]”.