544 



REPORT — 1881. 



Fig. 



SEPT? 



curve eommenced at A and ended at B, and though the rough diagram cannot 

 pretend to great accuracy, it shows clearly how the wind veered from the N.E. to 

 the N.W., and the only alterations that are required are in matters of detail. 



Mr. Shaw proposes to apply clockwork in a very inexpensive way, so as to cause 

 marks to he made along the curve at regular intervals of time, and by the intro- 

 duction of this element, it is evident that the 

 velocity will be given. The total length of 

 the curve is a convenient measure of the wind- ' 

 power at the spot : the marks will show the 

 velocity at any time, and the resultant, length 

 of the curve gives the direction and amount 

 of the transference of air at the spot. The 

 general view of the instrument as it will be 

 applied to observatories is shown in Fig. 1. 

 Here it will be observed the train (A) for 

 reducing the velocity of the cup's spindle is 

 placed at the top gf the rod instead of the 

 bottom, where it is now situated, and thus 

 the length becomes a matter of small im- 

 portance, since the slow motion of the spindle 

 which conveys motion to the serrated roller at 

 (IB), will ensure the reduction of the friction to 

 a minimum ; similarly the adoption of the self-acting head at (0) (the velocity ratio 

 of whose train is 1000) will cause the vertical tube (E, E,) in ■which ig contained 

 the cup's spindle to turn with almost the lightest winds — finally the clockwork 

 for recording intervals of time is placed at (D). 



SEPT If sv? 



SEPTf IfJ 



AUCT ■II ?T 



Aucrso™ 



12. 



On the Isothermals of the British Isles. 

 'M.A., F.B.S.E. 



By Alex. Buchan, 



13. 



On the Diurnal Period of Hailstorms. 

 M.A., F.B.S.E. 



By Alex. Buchan, 



li. On the 8wnspot Period, and Planetary Tides in the Solar Atmos;[)here. 



By F. B. Edmonds. 

 The author directs attention to a development of the planetary hypothesis of 

 solar distm-bance. The tidal disturbing effect of the planets on the sun, acting at 

 their mean distances, will be in accordance with the following order : Jupiter 

 Venus, Mercury, Earth, Saturn, Mars, Uranus, Neptune. The first four of these 

 are the most influential, and offer six combinations in pairs. Any one of these pah-s 

 may be taken with a third planet. Taking Jupiter as the third planet, the author 

 considered the combination involving Venus and the Earth, and gave some of the 

 results already obtained, but reserved the remaining combinations for notice on a 

 future occasion. 



15. Some Laivs which regulate the Succession of Mean Temperature and Rain- 

 fall in the Climate of Londoyi. By H. Couetenay Fox, M.B.G.S. 



16. 



On the Bloiving Wells near Northallerton. 

 By Thomas' Fairley, F.B.S.E. 



In 1878, Mr. Hutton of Solberge, near Northallerton (.3^ miles S.), informed 

 me of a remarkable outflow of gas from a well situated on his estate near his 

 residence. This current was observed while the barometer was fallino-. A 

 chemical analysis of this gas showed it to be common air containing 20-9 per cent. 



