ILLUSTRATIONS OF INDIAN BOTANY. 95 
the temperature, while it preserves a constantly moist atmosphere. The striking effect of these 
causes on vegetation is proy th by the fact, of the tea plant being confined to the south side of 
the valley, or tua picacied —- the mists from the cold wind blowing from the snowy mountains, 
The fact here stated is § oacly corroborative of the view above taken, that this is truly a 
tropical plant, delighting in a mild humid climate with a moderate range of temperature, and 
not one suited for bearing exposure to frost and snow during one part of the year, and a high 
tropical heat at another, and in so far, that the elevated of slopes the Himalay as, recommended 
on that very account by Mr. Royle as a suitable locality for its cultivation, are in truth most un- 
suitable. ‘The deep and sheltered valleys however of these mountains may, and probably 
will be found, to present a combination of circumstances most suitable for its introduction. 
only parts of the Indian Peninsula, so far as I am aware, whichseem in any degree 
fitted for the profitable cultare of this shrub are some portions of Mysore and Malabar, espe- 
cially the mountain valleys of the latter, which partake of the proverbial humidity of its climate, 
combined with such an abundance of foroate. as would at once suffice by their density to afford 
shade against too much light, shelter se cold blighting winds, and eat preserve an equal 
and humid atmosphere over the plants at all seasons of the year. Whether such a union of 
favourable circumstances can be Beat: in combination with the seas light poroal soil which 
this shrub affects in its native country, is not easy to say, but ina countr oying a range of tem- 
peraturé rarely, if ever exceeding 85° or falling below 60°, with Bk hasnt, and abundance 
lowing Metenuniibica! Table extracted from. oe Recon of the Trivandrum Wuere . atarding for the time the sg 
complete series of observations that has perha ee made in India or elsewhere. Itis ho wever to be observed, t at, as the 
a ie ivanc i by aeigeeny | as regards ‘the all 
m 20 to 30 inches annually. A 
se ners 
spo the register of the Wet 
and ra Bulb, Fienaaeer, will show, to n Malabar bohiad so Toad w ith moisture is the i: og at Tvivandram, er yey station 
on that coast, that at almost e — ph ohh of ea kote the depression of a few degrees of chao ee Produces a depositi w, and the 
mean Minimum ar for any mo) waged abe that of the dew a, oy, abore 4 degrees, and the nimum tempe 
falls below that of the dee poin “iphe tion of te smperature certain ceeds what I h Pen stated = the pede sp ‘be that va — with 
local circumstances, and the situation ne ‘the y -{ of ee very diferent character from those I suggested as the most 
suitable for the culture of this shrub. 
Register of the Thermometer as observed at Trivandrum. 
June | July | Aug. | Sept. | Oct. | Nov. | Dec. | Jan. | Feb. | Mar. | April | May 
The Max. Temp. ofeach Month go. 5 | 99. 3 | 89 8 | 88.3 | 90.3 | 85 5 | 87. 8 | 87. 8 | 2. 0 | 9. 4 | $3.0 
Min co gah ee do. 70. 8 | 70. 3 at Wr 8 ol Th a8 = ae, 0 | 67. 5) 68. 8 | 73. 8 | 72. 3 
Extreme range of each do Met 19. 0.1196 1 12. 5. oe 8 3 8 | 94.5 | 22.6119. 2 | af. 0 
ia ateckeae bt do ..} 83.16 | 83.64 | 83.73 | 85.07 | 84.09 | 82.92 eed ® 88 | 87.59 | 89.10 | 90.20 | 89.87 | 
Mean Minimum of yo «-+| 73.37 | 73.18 | 73.21 | 73.36 | 73.96 ; 72.57 | 71.52 9.72 | 71.02 | 73.73 | 75.97 | 76.94 
/Mean range of 979 | 10.46 | 10.52 | 11.71 | 10.13 | 10.35 | 13.42 16. 16 | 16.57 | 15.37 | 14.93 | 12,93 
. Mean hour of Max. Tess ‘of each Month...) th. 2 i 1 Noon ee 1 1 2 1 1 1 1 
-m. 
at }Mean hour of Minimum. .........-++++-+0+-++ 5 5 | 5 30} 6 6 6 6 6 6 6 6 
: he Maximum aunt Fomperttare, eceurred on May 13t ne and was 93°.3 ‘ 
The Minimam do. Dec. ast My, .AM. (1837) 650.5 
f HOURLY REGISTER-WET BULB THERMOMETER—1837-8. 
Table 1. Cheer the Daily and ary Dew Points (calculated from the depression of the Wet 
Bulb Thermometer) from June 1837 ots 1838. 
July 
T2271 
Aug. 
72.63 | 
Sept. 
Oct. Nov. | Dec. an, Feb. 
72.78 73,35 42,52 ) %0.34- oa 
68.73 
June 
bees wef) F200 
Mareh | April May | d 
70. 6 73.37 | 74.32 
= - HOURLY REGISTER—WET BULB THERMOMETER—1837. 
Table 2: Shewing the Mean Dew — of each hour for each Monte, rom June 1837 1 My 1838, 
Si 
nd for the whole 12 Months 
ee | Fane. hear Aug. Sept. Oct. Nov es Jan. Feb. | March | April | May | Mean 
Mean---| 72.56 W211 | W264 | 7280 | 78.84 sree 68.72 | 0.94 ed 74.33 | TL 
MORAND 
Of he Quant of Banach el ot Tri Feaniram for cach Mont rom 34une 1651 
ais until end of July 1838. 
No ge | 
_ Suly | Aug. 
Total ges Fe Festal Jun Fay. Total | 
10.0427 | 3,9344 | 6667/1. “i 
70,1608 | T7712 \2. 6667 ine ice | 4.1559\; 24.6677 | 
* ‘The quantity which fell in April and May 1837. not registered, t s X ‘ have been full 20 inches. 
can ot cal at 3.2163 
be 8.0105 
