26                          ALBERUNPS INDIA.

this way we have tried to facilitate the understanding
of the terminology.

Lastly, we observe that we cannot always in our
discussions strictly adhere to the geometrical method,
only referring to that which precedes and never to that
which follows, as we must sometimes introduce in a
chapter an unknown factor, the explanation of which
can only be given in a later part of the book, God
helping us!