Local Variations and Vibrations of the Earth’s Surface. 
By H. C. Russet, B.A., F.R.A.S. 
[Read before the Royal Society of N.S. W., 1 July, 1885.] 
As the network of science closes — the phenomena of Nature, 
every now and then some new fact is found protruding itself, 
attain to that perfection in observations which his science demands. 
He must now recognize the fact which the geologist has proved, 
that the earth’s crust is in a chronic state of vibration and change, 
to an extent probably sufficient to explain some of those trouble- 
some errors which have been heretofore ote down to instability in 
the instruments or change in the observ 
n 1878 a Committee of the British Assooiation was appointed 
and Mr. G. H. Darwin, who made the experiments and in whose 
name the report is written. 
The report is in two parts, vols. for 1881 and 1882 of the 
British Association Ae and is of the utmost importance to 
astronomers. The Committee at first thought it would be pos- 
sible to arrange such saan that the lunar effects could be 
seen. Sir William Sa ep suggested the method of testing the 
question, viz., by hanging a pendulum on a very firm support, and 
