The writer has not followed the usual practice of inserting historical notes at the foot of the page, and has tried instead, in the last chapter, to give a consecutive account of the history of pure geometry, or, at least, of as much of it as the student will be able to appreciate who has mastered the course as given in the preceding chapters.
Kirjanik ei järginud tavaks on lisada ajalooline märgib jalamil lehele ja püüdis selle asemel, et viimases peatükis, et anda järjest arvesse ajaloos puhas geomeetria, või vähemalt on nii palju see õpilane oskama hinnata, kes on õppinud Muidugi, nagu on esitatud eelnevates peatükkides.