Chemical Science. 459 



It was remarked at Cologny, that whenever the sun's rays 

 during the eclipse penetrated through the foliage of the trees, so 

 as to pass on to the ground, the images formed, instead of being 

 circular, as is usually the case, were crescents, varying in form 

 with the progress of the eclipse. This, though naturally to be 

 expected, had a singular effect from the number of images 

 grouped together — Bib. Univ. xv. p. 14. 



16. On the Dip of the Needle and Intensity of the magnetic 

 Force. — The following observations, on the dip of the needle and 

 the intensity of tlie magnetic force, have been collected and cal- 

 culated by Professor Hansteen : 



Edin, Jour. iii. p. 401. 



17. The Coe Fire of Derbyshire. — Mr. Bainbridge thus de- 

 scribes this phsenomenon. " It resembles a column of smoke 

 rising up from the woods that clothe the sides of many of the 

 peak hills, and is observed when there is a thick atmosphere, or 

 a light mist is setting upon the hills. Sometimes a single co- 

 lumn is seen, becoming divided shortly into several smaller ones, 

 and again re-uniting. The idea given to a stranger is that of 



2 H 2 



