42 
PUTNAM, 
Table A. 
Absolute Determinations of the Force of Gravity, with Results referred to Wash¬ 
ington , Coast and Geodetic Survey Office (not reduced to sea level). 
30 
Observer. 
Peters. 
Preston.. 
Sabine. 
Lorenzoni. 
Anton.. 
Peters , 
Peters . 
Bessel. 
Peirce. 
Plantamour.. 
Plantamour., 
Mahlke. 
Heaviside. 
Peirce 
Peirce 
Biot ... 
Bessel, 
Biot .. 
Pucci and Pisati 
Oppoizer. 
Von Orff. 
Messerschmitt.., 
Biot ... 
Borda.. 
Peirce 
Mendenhall. 
Defforges. 
Defforges. 
Defforges. 
Kater. 
Date. 
1890 
1829 
1886 
1878 
1869 
1870 
1826-27 
1875 
1869 
1865-71 
1891 
1874 
1876 
1876 
1825 
1835 
1824 
1882 
1884 
1877 
1889 
1824 
1792 
1876 
1880 
1893 
1888 
1889-90 
1817 
Place of deter¬ 
mination. 
Berlin. 
Washington.... 
Greenwich. 
Padua. 
Berlin , 
Altona. 
Konigsberg. 
Konigsberg. 
Geneva. 
Berne . 
Geneva. 
Hamburg., 
Kew.. 
Berlin. 
Kew. 
Padua. 
Berlin 
Milan.... 
Rome.... 
Vienna. 
Munich., 
Zurich... 
Paris 
Paris 
Paris 
Tokio. 
Washington.... 
Greenwich 
Paris. 
London. 
Apparatus. 
Lohmeier reversible 
pendulum. 
Peirce reversible pendu¬ 
lum. 
Kater convertible pendu¬ 
lum. 
Repsold reversible pend¬ 
ulum. 
Lohmeier reversible 
pendulum. 
Lohmeier reversible 
pendulum. 
Ball and wire, two 
lengths, differential. 
Bessel reversible pendu¬ 
lum. 
Bessel reversible pendu¬ 
lum. 
Bessel reversible pendu¬ 
lum. 
Kater convertible pendu¬ 
lum. 
Bessel reversible pendu¬ 
lum. 
Bessel reversible pendu¬ 
lum. 
Ball and wire, two 
lengths, differential. 
Bessel wire pendulum. 
Repsold reversible pend¬ 
ulum. 
Repsold reversible pend¬ 
ulum. 
Repsold reversible pend¬ 
ulum. 
Ball and wire. 
Bessel reversible pendu¬ 
lum. 
Ball and wire. 
Two reversible pendu¬ 
lums, differential. 
Two reversible pendu¬ 
lums, differential. 
Two reversible pendu¬ 
lums, differential. 
Kater convertible pendu¬ 
lum. 
Result reduced 
to Washing¬ 
ton. 
Length sec¬ 
onds pend¬ 
ulum. 
Gravity. 
Cm. 
Dynes. 
99.2995 
980.047 
.2998 
.050 
.3005 
.056 
.3007 
.058 
.3011 
.062 
.3013 
.065 
.3017 
.068 
.3021 
.072 
.3022 
.073 
.3024 
.075 
.3028 
.079 
.3033 
.084 
.3036 
.087 
.3048 
.099 
.3051 
.102 
.3054 
.105 
.3055 
.101 
.3062 
.113 
.3065 
.116 
.3085 
.135 
.S088 
.138 
.3092 
.143 
.3098 
.148 
.3102 
.153 
.3109 
.159 
.3114 
.164 
.3115 
.165 
.3134 
.184 
.3144 
.194 
.3236 
.285 
