178 Mekurological Results kept at Cornwall, for 1821. [March, 



Barometer, 



Highest, Jan. !J3. Wind, E 30-50 



Lowest, Dec. 28. Wind, SE ^. , . . . . 27-85 



Register Thermometer. 



Highest, Aug. 22. Wind, SE 73 



Lowest, Jan. 1 and 2. Wind, NE and SE 26 



Common Thermometer. 



Highest, Aug. 25. Wind, S 71 



Lowest, Jan. 1. Wind, NE 26 



Observations. 



Jan. 1. — Weather fine and clear, with a sharp frost ; 2d and 

 3d a fall of snow, which continued at intervals throughout those 

 days, but disappeared on the night of the 4th ; from 6th to 20th, 

 rainy, showery, and misty. The remainder of the month very 

 fine. 



Feb. — This month, with the exception of three days, was very 

 fine, and remarkable for the height of the mercury in the baro- 

 meter, which stood above 30*00 for twenty-three successive days. 

 There are but two instances in the last three years, in any month, 

 wherein the mercury stood above 30*00 more than eleven days, 

 and those not in succession. 



March. — In general, wet and stormy. On the 26th, it blew a 

 strong gale from the SW, with heavy rain ; between eight and 

 nine o'clock at night, the wind suddenly shifted to the NW, 

 blowing a hurricane. 



April. — This month, like the former, was wet and stormy j 

 some heavy hail showers, with thunder and lightning. 



May, — Also wet and unseasonable. 



June, — In general, a very fine month. 



July. — Like the former. 



August y September y and October. — Almost constant rain, with 

 heavy gales of wind, accompanied by thunder and hghtning. 



t)ecember. — This month might have been added to the former 

 three, but it was necessary to remark, that on the 28tli, the mer- 

 cury in the barometer fell to 27*85, being 00*43 lower than it had 

 fallen for the last four years (on the 4th of March, 1818, it stood 

 at 28*28), and it has been asserted by persons who have been 

 in the constant habit of observing the fluctuations of the mercury 

 for nearly 40 years, that they never saw it so low. It may be 

 proper to remark, that the observations refer to the common 

 upright barometer. 



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