Scientific American Supplement, No. 531, March 6, 1886


SCIENTIFIC AMERICAN SUPPLEMENT NO. 531 - NEW YORK, MARCH 6, 1886 - Scientific American Supplement. Vol. XXI, No. 531. - Scientific American established 1845 - Scientific American Supplement, $5 a year. - Scientific American and Supplement, $7 a year.

THE USE OF IRON IN FORTIFICATION.

HIGH SPEED ON THE OCEAN.

SIBLEY COLLEGE LECTURES. - BY THE CORNELL UNIVERSITY NON-RESIDENT LECTURERS IN MECHANICAL ENGINEERING.

PRINCIPLES AND METHODS OF BALANCING FORCES DEVELOPED IN MOVING BODIES. - BY CHAS. T. PORTER. - INTRODUCTION.

COMPRESSED AIR POWER SCHEMES. - By J. STURGEON, Engineer of the Birmingham Compressed Air Power Company.

THE BERTHON COLLAPSIBLE CANOE.

THE FIFTIETH ANNIVERSARY OF THE OPENING OF THE FIRST GERMAN STEAM RAILROAD.

IMPROVED COAL ELEVATOR.