the mean density of the earth. 
287 
Some of the errata in Mr. Cavendish’s paper. 
In page 399, line 10 from the bottom, for 8739000, read 
8740000. 
In page 399, line 6 b, or from the bottom, for 8739000, 
read 8740000. 
The same also in line 5 b. 
In page 399, line 4 b, for 10683 read 10685. 
The same also in line 1 b. 
In page 403, lines 12 and 13, for 8739000, read 8740000. 
line 13, for 10844, read 10847. 
—for 10683, read 10685. 
In page 404, line 11, for 185, read 186.5. 
lines 15, 16, 22, 25, for 185, read 186.5. 
It is to be noted, that after the experiments have been all 
made, and the motion of the arm carrying the small balls, 
and expressed in twentieths of an inch, observed and denoted 
by the letter B ; also the time of one vibration, expressed in 
seconds, denoted by the letter N ; and both of these being 
corrected according to certain rules there given, then the 
mean density of the earth D, in each experiment, is to be 
computed by this theorem, 
viz ■ D =-^8- or when corrected, D= • 
And by this theorem were calculated the following twenty- 
nine experiments, as they stand recorded in the original. 
