TRANSACTIONS OF THE SECTIONS. 29 
By a great variety of experiments, ”, the effect of radiation, is quite unimportant 
in practice (less than half a foot in a second), except in very low velocities. Its 
effect in combination appears to be constant for the same instrument, and precisely 
similar to that of v, so as to be included with it. The formula thus becomes 
C 
0+ r= ss —r=v. 
As already stated, he had made frequent and advantageous use of this cooling pro- 
perty of the air for measuring its velocity in coal-mines. In these situations it is 
perhaps the only accurate method which can be applied to determine the quantity of 
air which passes through the extremities of the workings—by the bodies of the work- 
men engaged in cutting the coal—at particular and critical outlets from the old 
wastes—in contractions by brattices, scalings, and perforated doors. In one of the 
most important of these cases, viz. the current of air by the bodies of the workmen 
in the extremities of the ‘intake’ system, he found enormous differences in different 
coal districts ; but he forbore to mention them, because statements of this kind, un- 
accompanied with full explanation, might lead to very erroneous conclusions re- 
garding the relative safety and good management of mines, and prejudice important 
inquiries now on foot. 
Professor Phillips found the therm-anemometer equally available in a great variety 
of other researches, some results of which he hoped to present hereafter. 
On Luminous Meteors. By the Rev. Prof. Powez, F.R.S. Se. 
See Reports in this volume, page 1. 
Meteorological Observations made at Huggate, Yorkshire. 
By the Rev. T. Ranxin. 
On a singular Atmospheric Wave, in February 1849. 
By the Rev. T. Rankin, 
On a Phosphoric Phenomenon in a Pond at Huggate, on June 11th, 1849. 
By the Rev. T. Rankin. 
' This communication described minutely, with all the attendant circumstances of 
weather, the state of the barometer and thermometers dry and wet, a violent explo- 
sion Of inflammable gas which took place on the above day, accompanied with smoke, 
a great noise, and rumbling concussion, such as to alarm several of the inhabitants 
_ of the village. The explosion of the gas was propagated along the pond from N.W, 
‘to S.E. Into this pond the refuse of the village had been for ages draining, and it 
Was a common receptacle for the dead bodies of various animals. 
On Magnetized Brass. By the Rev. T, Rankin. 
_ This communication was for the purpose of recording the fact that Mr. Rankin 
had found the northern half of a brazen meridian of a celestial globe to be so strongly 
magnetic as to deflect a small needle placed near it so much as eight points from its 
true direction ; while the southern part of it seemed to be totally free from magnetism. 
On Observations of the Barometer and Thermometer, made during several 
Ascents in Balloons. By Grorce Rusu. 
The results of five ascents are given by the author, viz. from Vauxhall, May 1837, 
4th of September 1838, 10th of September 1838; from Leicester, 27th of June 
1849 ; and Norwich, 4th of September 1849. On the'second occasion (the balloon 
passing into a snow-storm and rapidly descending) the barometer rose to 19 inches, 
while the thermometer fel/ to 22°, being 3° below what it had indicated at the great- 

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