PENDULUM OBSERVATIONS ATG 
During the first winter the pendulum observations were made 
in a small cave dug into an ice drift, but did not prove at all 
satisfactory, partly owing to the frost-fogging of the lenses and 
mirrors during the course of the observations and partly owing 
to the intense cold. There being more space in the hut during 
the second winter, a second series of observations was under- 
taken inside, a huge kenyte boulder being imported to serve as 
a solid base for the instrument. By cutting a hole through the 
floor of the hut and freezing the boulder to the frozen ground 
underneath, a very solid and rigid stand was formed. This 
second series was carried out in the dark room (by courtesy of 
Debenham), and the coincidences observed by telescope through 
a small window in the wall in order to reduce the temperature 
variation of the pendulums. The observations, though not equal 
to those obtainable in a fixed observatory, are quite concordant 
and should give sufficient data to substantiate definitely the 
theoretical formula at present in general use. 
