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November 11, 1872. 
The Presipent (PRoFESSoR HumpHry) in the Chair. 
Communications were made to the Society : 
(1) On the advantages of Denison’s Gravity Escape- 
ment for recording time by Electricity. By Mr 
W. Kinestey. 
The effects of corrosion and irregular impulse are avoided 
in this escapement by making the current pass through a por- 
tion of the pendulum and gravity arm; the pivot on which 
the pendulum is hung, the gravity arms and the banking pins 
being insulated, and the terminals of the battery being con- 
nected one with the top of the pendulum and the other with 
the banking pins, the current is made and broken at the end 
of each impulse; the wear and tear being confined to unim- 
portant parts. 
(2) Description of a form of Remontoir Clock invented 
by M. Groux. By Mr W. Kinestzy. 
The principle of this remontoir is the making the fly fan 
of the remontoir lock on an intermediate detent, so that the 
usual concussion and friction are avoided. 
Professor MAXWELL commented with approval on the prin- 
ciple of the remontoir clock, mentioning one or two conspicuous 
defects in existing clocks, and alluding to the difficulty under 
which a clockmaker laboured in devising any improvement on 
existing patterns. 
(3) On certain facts connected with the wasting and 
final disappearance of the Glaciers of North Wales. 
By Mr W. Kinestey. | 
The object of this paper was to shew that the Glaciers of 
North Wales were much larger than is commonly supposed, 
