288 Proceedings of Societies. 
though the slide would become greatly heated while viewing the sun, the 
conduction was cut off by interposing a plate of ivory. 
“On the Relationship between the Variation of the Earth’s Eccentricity 
and that of the Moon’s Mean Motion in Longitude.” By Dr Hincxs. 
“On the Connection that exists between Admiral Fitzroy’s ‘ Caution 
Telegrams’ and the Luminosity of Phosphorus.” By Dr Morrart. 
“ Report of Balloon Committee.” By Dr Ler. 
* Report on Balloon Ascents.”” By Mr J. GuaisHer, 
“On the Selenographical Relations between the Chain of Lunar 
Mountains ‘the Alps,’ with the ‘Mare Imbrium,’ and the ‘ Mare 
Frigoris.’"” By Mr W. R. Birt. 
Professor Curvauuier described a New Instrument for Ascertaining 
the Height of a Cloud by taking the Measure of the Shadow Projected— 
the instrument being formed something like a “ two-foot rule” with an 
upright piece attached. 
‘On the Distribution of Heat on the Sun’s Surface, and the Currents 
of his Atmosphere.” By Mr J. J. Murpuy. 
“On Ozone, more especially on Ozone Tests,” By Mr E. J. Lowe. 
“Comparisons of Curves afforded by Self-recording Magnetographs 
at Kew and Lisbon.” By Mr Batrovur Stewart. 
‘Description of the Experimental Series of Rain-Gauges erected at 
Calne.” By Mr G. J. Symons. 
“‘ Meteorological Observations.” By Rev. J. Ranxinz. 
“On a New Kind of Miniature, possessing Apparent Solidity by 
Means of a Combination of Prisms.” By Mr H. Swan. 
Dr Lee read a paper descriptive of certain Mountains and Craters in 
the Moon, discovered by himself and Mr Birt. One they had named 
“Mare Smythii,” in honour of Professor C. Piazzi Smyth. Another 
portion of the lunar landscape had been named ‘‘the Phillips Walled 
Plain,’ in honour of Professor Phillips, who had bestowed much atten- 
tion on the physical features of the lunar surface. Thirdly, they had 
given to an elevated range the name of the ‘‘ Percy Mountains,” in 
compliment to His Grace the Duke of Northumberland, who had been 
the only nobleman to go through a complete course of university study 
of three years inastronomy. The Duke had also rendered the important 
service of presenting to the University of Cambridge their large North- 
umberland Telescope. 
‘‘On the System of Forecasting the Weather pursued in Holland.” 
By Dr Buys Battor. 
“Account of Preliminary Experiments on Chalcescence.” By Dr 
AKIN. 
“On Spectral Analysis.’”” By Professor Piucker. 
‘*On Specific Refractive Energy.” By Dr Guapstons and Mr Dale. 
“On the Quantity and Centre of Gravity of Figures given in Perspec- 
tive, or Homography.” By Professor SyLvester. 
‘‘On the Augmentation of the Apparent Diameter of a Body by 
Atmospheric Refraction.” By Mr 8. ALexanper. 
‘On the Conditions of the Resolvability of Homogeneous Algebraical 
Polynomicals into Factors.” By Mr J. J. Wauxer. 
“On the Elasticity of the Vapourof Sulphuric Acid.” By Mr T. Tate. 
