Page images

By this process six valves are, properly speaking, formed, (and not three, as they are generally counted,) each lobe splitting into two hemispherical valves. The partitions alternate with the lobes, and are formed by the sides of two adjoining cells being, as it were, glued together, and extending to the axis of the capsule, from which they at length completely detach themselves, when it disappears altogether. The seeds or nuts are almost globular.

In Camellia the capsule is very obscurely triangular without any tendency to become deeply three-lobed. It bursts along the middle of each side (consequently alternately with the corners) into three very distinct valves, each of which belongs to two adjoining cells, because the three partitions originate lengthwise from the middle of the respective valves, and are therefore opposite or contrary to these, converging from thence to the triangular axis, from which they gradually separate, leaving it finally unconnected and free. The seeds are of an oval oblong shape, smaller than those of the tea.

The preceding remarks are made with reference chiefly to the Assam Tea and the Nipal Camellia; and purposely without technical precision, the object being simply to convey a general idea of the structure of the two sorts of fruit. But they admit of being applied with safety to all other instances of comparison between the genera in question. ,

References to the Figures in Plate III.

A The Assam tea. Figs. 1, 2, 3, ripe capsules scarcely enlarged; at l, seen from below, deeply three-lobed ; 2, the common form, commencing to burst ; 3, the same completely burst open, and discovering the seeds; 4, the same, the seeds being removed, and one of these represented separately ; of the natural size ; 5, the lower half of a ripe capsule divided by an horizontal section and the seeds removed, exhibiting the places of dehiscence along the angles or lobes, and the partitions alternating with these aud separating from the axis ; a little enlarged; 6, outline of a full-grown leaf, of the natural dimensions.

B The Nipal Camellia (C. kissi). Fig. 7, ripe and entire capsule slightly enlarged; 8 and 9, the same after bursting, the free axis being seen in the last figure; 10, a horizontal section as in the tea, much enlarged, representing the places of bursting, which alternate with the angles of the fruit, the partitions which are opposite to the angles of the fruit, and the valves, separating from the free axis ; ll, adetached seed, natural size; 12, outline of a full grown leaf.

(Signed), N. Waurcu, M. D. . Of. Sec. to the Com. qf Tea Cult. H. C. Bot. Garden, Dec. 24, 1834.

[ocr errors][ocr errors][ocr errors][ocr errors][graphic]

[In the foregoing correspondence, allusion is made toa prior knowledge of the tea-plant of Assam. The following extract from Captain W1Lcox‘s Memoir of a Survey of Assam, published in the Asiatic Researches XVII. p. 448, proves that oflicer to have been aware of its existence in the hills east of Sadiya:—l1e Writes from Manclié, a Khamti village, latitude 27° 29’ 16", longitude 97° 29':— “ according to promise, a specimen of the tea tree was brought to me from one of the neighbouring low hills; it was a full grown one, that is about five feet high; the leaves _were coarse and large, and not numerous.” Mr. Sco1"r and Captain DAV!DSON had also frequently seen it, and the latter officer says, that black tea is now brought to Goalpara from the Bhotan hills. In 1828, Capts. GRANT and Pzmnmvrom sent specimens of what the natives asserted to be the tea plant to Mr. Secretary Swnrrou, from Ménipur, but for want of the fruit, its genuine nature was not identified. These travellers made tea from its leaves, and found it approach very nearly in flavour to ordinary black tea.—ED.]

V.——Abstract of Meteorological Observations at Nasfrabdd. By Lieut.(7ol. THOMAS OLIVER.


TABLE I.—-Barometer reduced to 32'». Temperature of the External Air, and resulting elevation above Calcutta.

[ocr errors]

'29G 93'7 1485 ‘425 80'6 1497 28'232 88'5 1439

It is remarkable that the elevations for the nine months, since December, 1833, are all with one exception so much in excess to those for the same months of the former year: I am at a loss to account for this ; the average height of my Barometer for the nine months in question being only -026 lower than the average for the same

months of the preceding year. —— TABLE II.—Mean Temperature of each Month, with the Dzferences from the Mean of the Year. Months_ Temp. 23:; Temp. D15‘ Temp. D15

[ocr errors]
[ocr errors][graphic][graphic][graphic][ocr errors]

TABLE III.—Tempe1-alure of the Air, and Depression (D) of Wet Thermometer.

[graphic][graphic][graphic][graphic][graphic][graphic][graphic][graphic][graphic][ocr errors]

TABLE IV.-Dew Point (S), Comparative Tension (1), and Grains of Aqueous Vapour in a cubicfoot of Air (G).

[graphic][graphic][ocr errors][graphic][graphic][graphic][graphic][graphic][ocr errors]

The means for the last year are probably but little afl-‘acted by the want of ohserva. tions in November, since the hygrometric state of the air for that month appears to

difl’e1- not very much from the mean of the year. [The formula whence the dew-points in the above table are taken will be found

in the fi1-stVolume of the JOURNAL, p. 508, and in the GLEANINGS IN SCIENCE, i. 193.—En.]

« PreviousContinue »