PROCEEDINGS. 175 
the Superintendent of the Telegraph Department, and which was 
under the supervision of Mr. P. B. Walker, the Assistant 
emer assisted by Messrs. Dalgarno, Wilson, and Maguire, 
of whom were present to explain the various technicalities 
Amongst the numerous instruments on view was Fuller’s mercury- 
instruments ; also Major Cracknell’s torpedo-exploding shutter 
apparatus, together with a dynamo-electric apparatus intended for 
re age purposes in Sydney Harbour. : 
r. Dalgarno exhibited a private collection of magnetic and 
electric instruments, including an electric battery for curative 
oses 
Amongst the astronomical instruments exhibited by the Govern- 
ment Astronomer was a new barrel chronograph for registering 
star transits, the pen of which by the action of electro-magnets had 
two motions. 
Mr. Russell also had on view a meteorograph instrument 
designed by himself and made at the Observatory, for registering 
on a sheet of paper 20 inches long by 8 inches wide one day’s 
record of thermometer, barometer, direction and force of wind 
and eae 
the Nitella translucens—a species of w lant, samples of 
sediments of the water used in Sydney for doasautie purposes ; the 
of a beetle’s eye, which could be composed of 
various smaller lenses each producing a separate image ; and the 
orange-perforating moth belong to the ; genus Ophideres. 
A model printing press at work was exhibited by ‘the Stata 
were made in t fegeens ¢ frm talo ogue. 
The Conversazione Committee consisted of the following 
gentlemen :— 
Rev. W. Scott, M.A. 
Dr. Leibius. 
H. C. Russell, B.A., F.R.A.S. 
C. Moore, F.L.S. 
G. D. Hirst. 
WEDNESDAY, 6 J UNE, dog 
