230 PROCEEDINGS. 
Mr. H. C. Russetzi, Government Astronomer, exhibited a new 
form of Crooke’s Radiometer, and briefly explained its mode of 
10 
Professor LiversipGE, at the request of Mr. P. N. Trebeck, 
drew attention to two large specimens of columnar sandstone 
from the head of Lane Cove, and briefly explained that the 
’ columnar structure had proba ably been set up in the sandstone at 
that place by the “ baking action” of a dyke or overflow of basalt 
similar to the well-known instance at Bondi. He further stated 
that the same thing was often observed in the hearths of blast 
Suny where the sandstone floor, after exposure to the intense 
heat of the molten iron for som e time, gradually became Leo 
vitrified and split up into columnar masses, showing tage 
a exhibited a more or less regular po canes for Mr 
WEDNESDAY, 5 SEPTEMBER, 1877. 
Mr. CuristorHer Rotixsron, V.P., in the Chair. 
The minutes of the last meeting were read and confirmed. ; 
The following S genthehion were duly elected edstuare members 
of the Societ 
Neville. Griffiths, the Domain, Sydney. 
nderson, Union ub, Sydney. 
Thos. James Thompson, Pitt-street, Sydney. 
Edward Lloyd Jones, 345, peg street, Sydney. 
Richard Read, M.D., ‘Sing let 
Charles J ames Fache, Cleveland House, Redfern. 
The certificates of four new candidates were read. 
The following report from the Finance Committee was brought 
up :-— 
“The Committee appointed Pa the purpose of suggesting how 
the sum of £500 voted by Parliament to aid in the erection of a 
permanent home for this Society shall be obtained, recommend that 
an appeal be made by the Cou neil to the membe rs of sae imei 
A statement of edemthe an be resentations made by the 
Royal Society of New South Wales was apes ieee ted amongst the 
members, and the following list of publications received for dis- 
tribution was read :-— 
Fro 
Ei Acting Government Pri er, 200 co 8 Essay on mer 
South 
