1832.] 



Meteorological Observations. 



29 



throughout the year has been constructed ; and it derives addi- 

 tional utility from the paralled columns which we have been enabled to 

 insert for other localities, so that the whole presents a convenient 

 epitome of meteorological phenomena between 12° and 30° of north lati- 

 tude. Of the climate of Madras, the minutest details are recorded in the 

 voluminous and careful reports of the late astronomer Mr. Goldingham; 

 whose results merely required to be reduced to the freezing point. 

 The Ava tables are abstracted from Major Burney's registers pub- 

 lished in the Gleanings ; the Benares tables are taken from the 

 Oriental Magazine, 1827 : for the Seharanpur results we areindebtedto 

 Dr. Royle, who allowed us to look through his copious registers for 

 the purpose. As the several Barometers were never absolutely com- 

 pared together, entire dependence cannot be placed upon the mean 

 altitudes given ; but with regard to Calcutta, Benares, and Seharanpur, 

 as some opportunities occurred of comparison through the instruments of 

 different travellers, the relative altitude of these places can be esti- 

 mated tolerably well : Thus, Seharanpur will be found to be almost 

 exactly 1000 feet above the sea, as was before estimated by Captain 

 Hodgson: — Benares in like manner may be safely stated in even 

 numbers to be 300 feet above the sea. 



Table IV*. Monthly Deviations of the Barometer and Thermometer from their 

 annual mean height at Calcutta ; and at several other places, introduced for the 

 sake of comparison. 





Barometer at 32" Fahr. 



Thermometer. 





— t c© 



cu • 



'rr, O) 



'— ■ ~ 



CD 



CO 1 



» 





:N ci 





£« 



£o» 





<N S .E 



CO 



C 



'— cS 







-4- t>« 





at CO 





•— X C 



t* 



O 



cu S 

 ^co 



■* a 



„ o 



? -i 3 c 







mean o 

 from ) 

 21. 



© 



U CO 



CU i— 1 



t.i 



CO +J . 





mean o 

 observ 

 x.and r 



3 



CO 



© 



£ * B 



*" 4, I- 



•3 . 

 — 1>. 



. 



co co ao 



CO 



*j ■— i 



22 cs ^o 



B CM 



co. 2 



£ o^ 





u a.« 



a cs 



«£3 



2 a~ 



r-1 



•S CO 



a I'M 



5 j; oo 



S 1 



g JO g 



00 



1—1 -*f 



■" . CS 



3 «! . 



3 £ £ 



b ^ 



B 



o 

 a 



~3 *> C 



a 



> 



< 



s a 



CU CO ■"" 



X4 CM 



— OO 



CO 



i« 4) B 





Calc 

 year 

 max 



^ O cs 



-*S CM 



.a co 



0> r-t 



CO 





inch. 



inch. 



inch. 



inch. 



inch. 



deg-. 



deg. 



deg. 



cfe^. 



deg. 



Jan. 



+.146 



+.229 



+.208 



+.273 



+ .274 



— 6.5 



— 13.7 



—11.6 



— 17.0 



—21.8 



Feb. 



+.131 



+ 115 



+.172 



+.175 



+ .219 



— 4.5 



— 4.9 



— 6.0 



— 11.5 



—20.9 



Mar. 



+.087 



+031 



+ .095 



+.107 



+.151 



— 1.8 



— 2.8 



+ 1.0 



— 1.5 



+ 0.1 



April, 



—.006 



—.028 —.030 



—.043 



+ .061 



+9.7 



+ 7.8 



+ 5.1 



+ 9.& 



+ 6.1 



May, 



—.124 



—.105—152 



—.136 



—.060 



+ 5.2 



+ 5.6 



+ 7.5 



+ 13.y 



+11.6 



June, 



— .11? 



—.156 —.248 



—.289 



—.217 



+ 7.4 



+ 7.1 



+ 5.5 



+ 18.1 



+ 17.5 



July, 



—.103 



—.176 



—.218 



—.308 



—.398 



+3.9 



+ 4.4 



+ 4.6 



+ 6.V 



+ 12.8 



Au<?. 



—.088 



—.126 



—.194 



—.203 



—.278 



+3.0 



+ 4.1 



+ 3.6 



+ 6.4 



+ 10.0 



Sept. 



—.057 



—.098 



—.115 



—.0981— .158 



+2.1 |+ 4.3 



+ 3.7 



+ 5.8 



+ 9.5 



Oct. 



—.018 



—.010 



+.020 



--.074 



—.047 



+0.1 



+ 2.2 



+ 2.5 



+ 1.3 



— 0.8 



Nov. 



+.006 



+.102 



+■161 



--.181 



+.209 



— 3.1 



— 4.2 



1— 5.4 



— 9.7 



— 10.8 



Dec. 



Ann. 

 mean 



+.124 



+.201 



+.258 



+.279 



+ .245 



—4.9 



— 10.1 



— 11.5 



-17.6 



— 13.8 



29.810 



29.573 



29.764 



29.464 



28.766 



81.69 



78.39 



78.13 



77.81 



73.5 





.270 



.405 



.5(16 



.587 



.672 



13.9 



21 



19.1 



31.5 



3 



It will be remarked that the range of variation in the weight of the 

 atmosphere increases with the latitude, even up to the foot of the Himalaya 



