TABLE Lit. 



TABLE LIII. 



Giving as the probable error of a single difference :- 



M,, 5 = 4-9x10 ' sec. 

 M ? 7 =6-4 

 21 M,, =2-6 



Mean 4-6 x 10~' sec. 



MELBOURNE OBSERVATORY. 

 MARCH SlST TO APRIL 3RD, 1913. 

 Latitude, 37 49' 53" S. Longitude, 144 58' -5 E. 

 Height above mean sea-level, 26-9 metres. 



By the time the pendulum observations in New Zealand were finished, the " Terra 

 Nova" had already sailed for England, and the apparatus must therefore be carried 

 back with me. As this involved a train journey of a few thousand miles across Canada, 

 it was obvious that the pendulums would be exposed to some danger of being damaged 

 en route, and of changing their constants. It therefore seemed necessary to make a 

 series of observations at some spot whose value of " g " was already well determined, 



72 



