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ever, we had no sooner got within 15 yards of them, than we were assailed with a shower of arrows, which struck several of

Our files were then extended to skirmishing order, and we returned with a round of musketry, killed and wounded several of them, fixed bayonets and charged them ; but they knowing the intricacies of the jungle, and being extremely nimble, succeeded in not only effecting their own escape, but also in carrying off the disabled of their party. We were brought up by a deep pool, and saw them making off on the other side, and heard them calling out Yahun, Yahun.

We then continued our march along the beach, and discovered another pool of very good and sweet water immediately opposite the vessel, and just within the skirts of the jungle. The water casks were sent for, a jack was hoisted at the pool (being a preconcerted signal to those on board ; left half of the party there, and proceeded with the remainder along a path into the jungle, expecting that it would lead to a village, where we might get some fresh stock. We advanced about a couple of miles without seeing any more huts or natives, and no quadru-, peds of any description.

The wood into which we penetrated, and in which the bugle alone kept us together, was one of the most gloomy and dismal that can possibly be conceived. It was indeed,

66 Nemus atrum horrenti umbra." The trees were of vast height, and in many places thickly interwoven with rattans and bushrope. The sun-beams were unable to penetrate the entangled foliage, the atmosphere in consequence bore the semblance of twilight. ' The air was loaded with a damp and pestilential odour, occasioned by the rotten twigs, leaves, and fruit, with which the ground was thickly strewed, which, besides, was exceedingly swampy. The deathlike stillness was occasionally interrupted by a solitary parrot winging its noisy flight over-head; but owing to the richness of our vegetable canopy, it was almost impossible to gain even an imperfect view of him. Numerous snakes were observed stealing along amongst the bushes. From several we had narrow escapes. Those that we succeeded in killing were all furnished with the poisonous fangs; and many of them bore a striking resemblance to the Coluber prester or Viper, but they were all spotted.

Tired with our unprofitable excursion, we returned to the watering pool, and the casks having been rolled up to it, we sat down to dinner before we commenced filling Whilst engaged with our repast a strong party of the natives came down upon us, and threw in a shower of arrows, which killed one and wounded severely three of the soldiers. We quickly formed, charged them, and killed and wounded several by our fire, and continued skirmishing with them till sunset ; for they seemed to be exceedingly cunning and revengeful, and made some des perate attempts to cut off the pioneers engaged in filling. After they had completed the watering, we pulled off from Kellie Bay for the ship, with the four boats ; but a current at that time setting to the N.E. at the rate of 3 or 4 knots an hour, we found that we could not reach her, The water-boats were anchored in consequence, and the two others went alongside. The ship's anchor was weighed, and dropping down to the longboat and cutter, brought up in 13 fathoms water, and by midnight got on board, laden with bows, arrows, specimens of ambergris, shells, &c.

14th November. During the night heard the savages shouting and yelling on the beach, seemingly in defiance. At daylight weighed, and stood through Duncan's Great Passage. At 10. A. M. got on a coral reef, not laid down in any chart; least water 5 fathoms, with the following bearings: North end of the Little Andaman S.S. E. ; the N.W. point S.W. by S. ; the centre of the South Brother S. E. by E. E., distant 4 miles; and the centre of the North Brother E. 1 N. Both these islands, like the Little Andaman, are flat, and covered with high trees, without a rising ground of any sort on them. Kept away to the northward, and got twelve fathoms all the way

between the South Brother and Sisters, and in a few days arrived safely at Rangoon.

Prome, Birman EMPIRE,

15th December 1825.

Some particulars relative to the Tides in the upper part of the

River Thames, and of the obstructions caused by the present London Bridge. By P. Barlow, F.R.S., Mem. Imp. Acad.

Petrop., &c. (Communicated by the Author). London Bridge, which has for so many years bestrided the Thames, is now doomed within a very short time to be removed, and a considerable change will be, there can be no doubt, effected in the state of the River from the present site of the Bridge upwards. It may not therefore be uninteresting to record some particulars relative to the present state of the tides, and of the river, in order hereafter the better to compare the change which the removal of the bridge may occasion. When this question was before Parliament, I was summoned to attend the Committee to state my opinion relative to some points connected with these probable changes, and it was on that occasion that I collected together the several facts given in the following pages, and which, if they should not be found to furnish any present important information, may hereafter be referred to as matters of interest by the curious inquirer. Some doubts having been suggested as to the damage which might be sustained by the wharfs, &c. above bridge, by the rising of the river above its present level at high water, and the exposure of the sewers at low water, the data here given are such as are connected more particularly with these questions ; they consist,

1. Of the sectional area of water-way at the different bridges, at various states of the tide.

2. Of the hourly rise and fall of the tide, and the difference of level at different times of the tide, immediately above and below London Bridge.

3. The rise and fall, and interval between the time of high and low water, at Woolwich, and at several other places on the river, ascertained by observations made on the same days.

4. Experiments and observations made on the velocity of the tide at ebb and flood at Woolwich, and other places on the river.



5. The difference of level between the high and low water, at several places on the river, and other miscellaneous particulars.,

1. Sectional areas of water-way at London Bridge, and at

Southwark, Blackfriars, Waterloo, and Westminster Bridges, at different periods and states of the tide.

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At an extraordinary high

tide, 2 feet above the usual average spring tide high water-mark, the water-way through

the different bridges is, 8130 15,260 15,460 At the Trinity, high wa

ter mark or datum, 7360 13,940 | 14,117 At an average spring tide,

high water below Lon. don Bridge,

7122 Do. above Bridge, 6837 13,170 12,975 Average neap tide, high

water above Bridge, 5293 11,135 10,590 Spring and neap tide, low

water above Bridge, 1488 5,012 3,724 Neap tide low water below Bridge,

1030 Spring tide low water below Bridge,


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The linear water-way at London Bridge between the Piers

above the Starlings,
Linear distance occupied by the Piers,
Total distance between the abutments,
Linear water-way below the Starlings at low water,
Linear distance occupied by the Starlings,

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From this table it appears, that, at low water spring-tide, the sectional area of the water-way at London Bridge is not more than about two-fifths of that at Waterloo Bridge, which has the least water-way at low water of the other four bridges ; this contraction acts as a dam, and causes the water to accumulate so much above bridge, that the sectional area below bridge is very little more than one-third of that above bridge.

And at high water spring-tide, the water-way at London Bridge is, at a medium, about half that at Southwark, which has the least section of the other four bridges at high water, and this again causes an accumulation below bridge, but by no means so great as in the former case.

The effect of this blockage on the hourly rise and fall of the water at the bridge is shewn in the following table:

2. TABLE of the Ebbing and Flowing of the tide at London

Bridge, taken above and below on the 29th of July 1821.

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By means of this table we readily find the head of water above and below bridge at each successive hour of the tide,

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