428 
MR. BAILY ON THE CORRECTION OF 
the Philosophical Transactions for 1829 ; and of the convertible pendulum, in 
the same work for 1829 and 1831. 
Eighth set. — Results with a Brass Bar, 2 inches wide, § inch thick, and 622 
inches long. 
25) Knife edge A. 
26) Knife edge B. 
Exp. 
n 
Exp. 
n 
113—114 
1-872 
115—116 
2-027 
119—121 
1-819 
117—118 
2-007 
122—124 
1-844 
126—128 
1-975 
124—125 
1-865 
128—130 
1-956 
136—139 
1-848 
131—133 
1-945 
139—141 
1-838 
133—135 
1-896 
Mean = 
1-848 
Mean = 
1-968 
Ninth set. — Results with Copper and Iron Bars, 2 inches wide and ^ inch thick. 
Copper, 62 - 5 inches long. 
Iron, 62-1 inches long. 
27) Knife edge A. 
28) Knife edge B. 
29) Knife edge A. 
30) Knife edge B. 
Exp. 
n 
Exp. 
n 
Exp. 
it 
Exp. 
n 
1-896 
1-998 
1-935 
2-098 
1-915 
1-994 
1-926 
2-019 
1-856 
1-978 
1-975 
2-078 
1-899 
1-994 
1-945 
2-061 
Mean= 
1-891 
Mean = 
1-991 
Mean= 
1-945 
Mean= 
2-064 
As these two bars are both of the same thickness, it would appear that the 
shorter pendulum gives the greatest value of n : but the discordance probably 
arises from some error in the assumed specific gravity of the metals ; since, as 
1 have already observed, it was not deduced from the pendulum itself. I have 
not here given the references to these experiments, as the details of them will 
form the subject of a Report to be laid before Government, which I am about 
to draw up, relative to the pendulums employed by the late Captain Foster, 
in his voyage of experiment. 
