M.L.PENCE

OF

GEOMETRY,

CONIC SECTIONS,

AND

PLANE TRIGONOMETRY.

BY ELIAS LOOMIS, LL.D.,

PROFESSOR OF NATURAL PHILOSOPHY AND ASTRONOMY IN YALE COLLEGE,
AND AUTHOR OF A COURSE OF MATHEMATICS."

66

REVISED EDITION, WITH APPENDIX.

NEW YORK:

HARPER & BROTHERS, PUBLISHERS,

FRANKLIN SQUARE.