Occasional Meteorological Remarks and Observations, §c. 129 



concave lens, the advantage procured by Mr Barlow's construc- 

 tion of reducing the length of the telescope with the same focal 

 power is secured ; and he considers, moreover, that by a pro- 

 per adaption of the distances, foci, &c. of the lenses, we might 

 hope to combine with all these advantages that of the de- 

 struction of the secondary spectrum, and thus obtain a perfect 

 telescope. 



Art. XXIII. — Occasional Meteorological Remarks and Ob- 

 servations, during the years 1826-27. By a Correspon- 

 dent. 



1 propose to extract from my memoranda some meteorologi- 

 cal particulars which I have observed during the last two years, 

 both in Edinburgh or its vicinity, and on the Continent of 

 Europe. Some of the incidents may, I hope, afford interest- 

 ing matter of comparison to other meteorologists ; and I shall 

 merely allude to those which have already been circumstan- 

 tially detailed by myself in former numbers of this Journal. 



January 9, 3 826. — Very hard frost ; at 3 afternoon in the 

 country, only 26| ; at 8 a. 23J. January 15th. — A very sin- 

 gular and piercingly cold day. A strong fog prevailed, which 

 throwing out moisture, congealed in beautiful icy pellicles on 

 every object. It prevailed in the evening, obscuring the sky 

 for far above the horizon. At 10 a. 15J°, about 400 feet 

 above the sea. * 



January 21st. — I observed a singularly beautiful auroral 

 phenomenon this evening, somewhat resembling the famous 

 arch of the 19th March 1825, but in some respects more cu- 

 rious. Soon after 9 J a., when observing Jupiter, I saw a faint 

 arch pretty low over the N. E. I thought at first that it was 

 the common stationary polar lights, but soon perceived that it 

 moved. At 9 h 43' it passed through Cassiopeia in the west, and 

 through Leo, rising at 9 h 47' through Castor and Pollux, and 

 Auriga, appearing almost in the zenith ; at 9 h 49 x through 

 Procyon and the Pleiades ; at 9 h 51/ through a and y On- 

 onis and Aries ; at 9 h 55' through Orion's belt ; at 9 h 58' 





9 See a full account of this great cold in this Journal for October 1826. 

 VOL. IX. NO. I. JULY 1828. I 



