TRILINEAR CO-ORDINATES.

ON

TRILINEAR CO-ORDINATES,

THE METHOD OF RECIPROCAL POLARS,

AND THE THEORY OF PROJECTIONS.

BY THE REV.

N. M. FERRERS, M.A.

FELLOW AND TUTOR OF GONVILLE AND CAIUS COLLEGE.

Geo. W. Evans

THIRD EDITION.

London:

MACMILLAN AND CO.

[All Rights reserved.]