Summary of a Meteorological Register for 1863. 49 



November was warmer than any November in the ten years. 

 The temperature was variable, but no great changes. On the 

 21st the barometer rose after 9 p.m. till 7 a.m. of the 23d, .665 

 inch. ; it then fell till 7 a.m. of the 25th, .66 inch. ; then rose till 2 

 p.m of the 27th, and fell on the 28th .7 inch. The quantity of rain 

 was less than the average ; it fell on 10 days, and snow on 4 

 days. The prevailing wind was west. The aurora-borealis, a 

 lunar halo, and a meteor, were each observed once. 



December was 1.593° warmer than the average of Decem- 

 bers ; the thermometer varied considerably, falling 28.3° from 

 2 p.m. of the 9th to 7 a.m. of the 11th ; then rising 37.7" to 2 p.m. 

 of the 13th. The barometer was 30.679 inches on the 7th at 7 

 a.m., and fell to 29.927 on the 9th at 2 p.m ; rose to 30.47 on the 

 11th at 7 a.m., and then fell to 29.276 on the 14th at 7 a.m., 

 with some other great changes before the close of the month. 

 The quantity of water was nearly the average ; rain fell on 9 

 days, and snow on 3. The prevailing wind was west. Lunar 

 haloes were observed three times ; a rainbow, a parhelion, and 

 a meteor, each once. 



For the year the maximum of the thermometer was 95°, being 

 less than 1859 and 1862, and the same as 1854 ; the minimum 

 was greater than any year except 1862. The maximum of the 

 barometer was greater, and the minimum greater also, except for 

 1858 and 1860. The extreme range of the thermometer was 

 less than any year except 1862, and that of the barometer 

 greater than the others except 1856 and 1857. The prevailing 

 wind was the same as 1857, 1861, and 1862. 



A fact has been illustrated, in making a chart of the weather 

 for the year, that I will mention, although I presume others 

 have noticed the same : About the time that the thermometer 

 makes a great rise the barometer falls, and so vice versa. It 

 can be seen better by a chart than by the figures, and illustrates 

 one of the laws of meteorology very finely. 



