452 Additional Note on the Climate of Nagpur. [Ocr. 
Tron. Wood. 
Tons. Fons. Tons. 
6 double main chains, joints and bolts............ - 8.5 
' 74 vertical rods, with joints, bolts, &c............... 1.385 
Flat bats and! boltse.. ore peioent a lhe en sce chve scmac ake 
37 double joists, blocks, cleats, &c..... .....-.e0% 6.190 
' Bolts, nuts, screws, stanchion plates, flat rings, &c. &c. 
Som seams ts cco hatte ecg eee ok a tit ai ee. 0.383 
Planking 1.124 cubic feet, sal wood,...............- 27.000 
Tron spikes, 16.37 Q fox, planks aie 0 oss wletsma ejmie aie 1.467 
Tron railing trussed, screws, nuts, &c............ .. 1.314 
Wood for the hand rail, 52 cubic feet,...........-..- 1.479 
376 feet of cornice to theplatform........ ...0.¢.- —- 1.531 
14.775 36.200 50.976 
Composition of resin and oil,,............ ABBE Es se 1.745 
Total weight hung between the pillars,.... . Sabboseae tons. 52.720 
V.—Additional Note on the Climate of Nagpur. By J. Prinsep, 
Sec. As. Soc. &c. 
In the May number of the Journat were published the results of Dr. 
Geppxs’ Meteorological Observations made in 1831-32 at Kampti, in 
the neighbourhood of Nagptr, which, as observed by the author, were 
in some degree deficient for the want of abarometer ; the sympiesometer 
which took the place of that instrument shews by the registers a con- 
stant deterioration from the increase of the column of air*, which ren- 
ders its indication of comparative inutility in accurate calculations. Iam 
now fortunately able to supply the deficiency, of barometrical data, from 
the copious registers kept by Dr. Wy.rz at Nagpur, between the years 
1820 and 18380, (with some intermissions,) of which that gentleman 
was so kind as to permit me to take copies ere he proceeded to Europe. 
Dr. Wyutn’s barometer was filled by himself without boiling. A 
note in his diary in 1820 states, that it stood 0.235 lower that some 
other tube (Dr. Voyssry’s? ) with which it was compared. In Febru- 
ary 1822, the tube was cleaned twice, and fresh mercury added: in May 
of the same year it was again cleaned. On each of these occasions, the 
height of the mercurial column was elevated more than a tenth of an 
* This isa fault in the sympiesometer which might perhaps be remedied by- 
making the oil-cistern higher, so that the oil should on an average stand on the 
same level in the two legs of the inverted syphon. In an instrument in my posses- 
sion after one year, in 1822, the index point had fallen 0.3 inch below the baro- 
meter ; in 1823, 0.5 inch; in 1825,0.8; and now, in 1833, I find it 1.38 
inches : Dr. GreDDEs, according to his register, must have followed the same rate 
of deterioration : the level in mine is now nearly even with the reservoir. 
