1820.] tJie Red Snow of the Environsof Mount St . Bernard. 423 



only the fragments are found, and that, in conjunction with the 

 resinous principle, it is the direct cause of the colour. The pro- 

 portions in which this metal is found, in these four analyses in 100 

 parts of the residue, are : 



Residue, No. I 21-35 



No. II 31-25 



Water, No. I 12-00 



. No. II 49-36 



Article IV. 



Meteorological Journal kept at Manchester for 1819. 

 By Mr. T. Hanson. (With a Plate. See CV.) 



(To Dr. Thomson.) 



SIR, Manchester, March 8, 1820„. 



Enclosed I have sent you my annual results of the weather 

 for the past year ; also the results for the month of January^ 

 accompanied with a chart of the daily notations. 



To the meteorologist, the chart scarcely needs any elucidation. 

 The first and second horizontal spaces from the top ai'e allotted 

 for the days of the month and moon's age ; the five following are 

 for fog, rain, snow, hail, and thunder, as marked in the margin. 



The spaces are darkened in proportion to the duration of the 

 above occurrences, paying attention to the time of the day or 

 might. 



The course and strength of the wind by curves, with respect 

 to the wind's force, 0, is considered a calm : 1, a gentle wind.;, 

 2, a little stronger ; 3, a strong wind; and 4, a boisterous wind, 

 or a hurricane. 



With respect to the barometrical curve, I have depicted the 

 jeal oscillations of the atmosphere as accurate as circumstances, 

 would allow. 



The curve of temperature is formed from the daily extremes 

 registered by a Six's thermometer. As the coldest part of the 

 day is generally about an hour or two before sun-rise, and tha 

 warmest about two o'clock in the afternoon, those points in the 

 chart denoting those periods of the day are carefully noted. Some- 

 times the extremes of temperature otherwise happen, particularly 

 on the breaking up of a frost, or the setting in of one ; when that 

 is the case, the time is accordingly noted. 



The left side of each daily perpendicular space denotes the 

 morning, and the right the evening. 



1 am, Sir, your most obedient servant, 



Thomas Ha .n son. 



