PYRAMID PROBLEM
OR,
PYRAMID DISCOVERIES.
WITH A
NEW THEORY AS TO THEIR ANCIENT USE.
BY
ROBERT BALLARD,
M. INST. C.E., ENGLAND; M. AMER, SOC. C.E.
CHIEF ENGINEER OF THE CENTRAL AND NORTHERN RAILWAY DIVISION
OF THE COLONY OF QUEENSLAND, AUSTRALIA.
NEW YORK:
JOHN WILEY & SONS.
1882
Copyright,
1882,
By JOHN WILEY & SONS.
PRESS OF J. J. LITTLE & CO.,
NOS. 10 TO 20 ASTOR PLACE, NEW YORK.