822 



Abstract of Meteorological Tables. 



[Dec. 



We may now pursue the same course with Mr. Dashwood's tables 

 for Tirhut, from December, 1833, (prior to which they have already been 

 inserted,) first only reducing the barometric altitudes to 32°. Mr. Dash- 

 wood, following my recommendation of tapping the tube before reading 

 off, has, as I expected, made the daily oscillation considerably greater than 

 in his first register. Thus also my new standard barometer is found to 

 oscillate full a fifth more than the old, so that the real external change 

 of pressure during the day is hitherto only approximately known, and 

 may perhaps be nearer 1^ than 1 -tenth of an inch. 



Monthly Abstract of Meteorological Observations, kept daily at Mozafferpilr 

 in Tirhut, from the 1st December, 1833, to the 3lst May, 1836, by the 

 late Thomas Dashwood, Esq. C. S. 



Month. 



1833. 

 December, . . 



1834. 

 January, . ■ 

 February, . . 

 March, 



April, 



May, 



June, 



July, 



August, 

 September, 

 October,.. .. 

 November,. , 

 December, 



1835. 

 January, 

 February, . 

 March, ... 



April, 



May, 



June, 



July, 



August, . . . 

 September, 

 October, . . . 

 November,. 

 December, . 



1836. 

 January,. . 

 February, .. 

 March, 



April, 



May, 



Means, 1833, 

 Means, 1834. 

 Means, 1835. 



Mean of 3 ys. 



Barometer 



reduced 



to 32°. 



9! AM 

 inch. 



29.662 



29.670 



29.62 



29.55 



29.470 



29.281 



29.20+ 



29.252 



29.280 



29-373 



29.525 



29.722 



29.762 



29-775 

 29.761 

 29.675 

 29.659 

 29.4/2 

 29.377 

 29-331 

 29.399 

 29.494 

 29.605 

 29.329 

 29,772 



29.775 

 29.697 

 29.499 

 29-409 

 29.275 



29.433 

 29.475 

 29.595 



Thermometer 

 in doors. outside. 



i§PM 



inch . 



29.570 



29.572 

 29.531 

 29-439 

 29.367 

 29-195 

 29.133 

 29.167 

 29-194 

 29.264 

 29.450 

 29.621 

 29.660 



29-687 

 29.672 

 29.601 

 29.528 

 29.365 

 29.306 

 29.268 

 29.310 

 29-380 

 29.518 

 29-741 

 29.671 



29-678 

 29.598 

 29.393 

 29.291 

 29.185 



9|am|4§P M 



29-348 

 29.383 

 29.503 



o 



62.0 



58.0 

 64.6 

 72.fi 

 77-4 

 84.2 

 83.7 

 84.0 

 83.8 

 83. S 

 79-5 

 71.5 

 65.1 



59-5 

 65.0 

 71.5 



78.4 

 82.4 

 83.0 

 81.9 

 82.8 

 81.5 

 78.1 

 67-8 

 61.0 



56.8 

 61.8 

 73.6 

 78.9 

 83.3 



29.501 29.41 



General mean, 29.456 



76-0 

 75-6 

 76.1 



o 



64.1 



61.0 

 69.2 

 76.4 

 78.6 

 85.5 

 85.4 

 85.6 

 85.4 

 81.7 

 81.0 

 74.0 

 67-8 



63.1 



69.6 

 76-5 

 80.2 

 83-7 

 84.6 

 82.5 

 84.1 

 83.6 

 80.4 

 71.7 

 64.6 



60.6 

 65.5 

 77.2 



80.4 

 85.1 



79-0 

 77-6 

 77.1 



Max.iMin 



o 

 70.1 



68.5 

 75.5 

 85.4 

 91.2 

 103.6 

 95.4 

 92.3 

 90.3 

 89.8 

 85.2 

 73.8 

 70.7 



65.5 

 72.8 

 83.0 

 93.9 

 95.3 

 93.9 

 88.8 

 88.2 

 86.8 

 82.0 

 72.4 

 68.4 



65.1 



72.2 

 86.5 

 94.4 

 97-8 



87,0 

 85.5 

 82.6 



75.9| 77-9 



76.9 



o 

 54.8 



48.5 

 56.4 

 63.7 

 69.4 

 75.3 

 76.8 

 77.7 

 77-9 

 78.0 

 74.0 

 57-7 

 53 6 



44.5 

 52.8 

 57-7 

 66.6 

 74.1 

 74.1 

 73.9 

 73.1 

 71.3 

 64.8 

 53.6 

 47-0 



41.4 

 48.3 

 60.2 

 66.8 



73.5 



69.1 

 67.4 

 62.8 



85,4 66.4 



75.9 



Winds 

 Number 

 of days. 



W.E.N. S, 



18 13 



20 



14 



16 



11 







1 







7 



3 



9 



23 



21 



22 



12 



25 



14 



5 







10 



12 



3 



18 



16 



13 



10 1 

 12 1 1 



14 1 

 18 1 

 31 



29 



30 

 21 2 

 20 



9 



5 2 



10 



9 



15 1 

 4 



16 

 26 

 29 1 



17 

 17 

 25 

 11 

 5 

 18 



1 







21 10 



12 17 



7 14 2 



11 15 



3 22 



132 232 ? ? 



125 209 8 1 



150 192 6 2 



Weather. 



fogs and showery. 



clear, cold, 

 fair, changing. 

 W.in day, E. at night, 

 do. 4 northwesters, 

 wind strong at night. 

 Cloudy and squally, 

 earthquake on 11th. 

 changeable, 

 fair, earthquake, 

 gale on 4th, wet, fine, 

 fine, clear, 

 hazy, fogs in morn. 



do. clear days. 

 4 squalls, fine, 

 cloudy, fair, 

 frequent squalls, 

 several storms, 

 very heavy hail 14th. 

 constant raiD. 

 3 storms, fair. 

 6 northwesters, fair, 

 light winds, fair, 

 clear, 1 fog. 

 heavy fogs, 1 squall. 



natural ice 3 nights, 

 changeable, fair, 

 fair, 2 storms. 

 W. morn, E. night, 

 clear, squally. 



The depth of rain 

 was not noted. 



2 W. | E. 



The Tirhtit Barometer had not been compared with my standard. 



