PEIRCE AND DEFFORGES INVARIABLE, REVERSIBLE PENDULUMS [327]
VON STERNECK AND MENDENHALL PENDULUMS [331]
ABSOLUTE VALUE OF GRAVITY AT POTSDAM [338]
APPLICATION OF GRAVITY SURVEYS [342]
SUMMARY [346]
Victor F. Lenzen and
Robert P. Multhauf
DEVELOPMENT OF GRAVITY PENDULUMS
IN THE 19th CENTURY
