The textbooks on infinitesimal calculus contain a great many solved indefinite integrals. If, however, one wishes to look up one or another of these integrals, one often loses much time in hunting for it in these books.

It can therefore be very useful to put together these formulas in methodically classified groups.

Such a collection seems to me to be of great use to students of the infinitesimal calculus. For this reason I have also included numerous applications of the given formulas and at the center of the work I have furnished the principal transformations of the integrals.