MATHEMATICAL ARITHMETIC.
MATHEMATICAL ARITHMETIC, By Rev. Thomas Hill. 12mo. 37 cents.
GEOMETRY AND SCIENCE OF FORM.
AN INTRODUCTION TO GEOMETRY AND THE SCIENCE OF FORM. Prepared from the most approved Prussian Text-Books. 12mo. pp. 180. 160 Figures, 83 cents.
"I have carefully examined the manuscript of 'An Introduction to Geometry,' and think it admirably adapted to supply an important want in education. It is not a mere geometrical logic, but a natural and simple introduction to the Science of Form."
BENJAMIN PEIRCE,
Perkins Professor of Astronomy and Mathematics in Harvard University.
GEOMETRICAL BLOCKS.