AND GEOLOGY OF THE MALAY PENINSULA* 
137 
Banka, where tin pits are often dug to a considerable depth through 
the alluvium, there has been found a bed of turf, with wood which 
had been cut, below20 feet of clay; a boat, differing wholly from any 
of the kinds which have been in use from time immemorial, at a 
depth of 16 feet; and traces of a rice field in another deep pit.* 
ADDENDA. 
Heights of mountains. — (Ante p. 89.) In a M. S. plan of the 
triangulations on which Jjieutenent Wo ore’s excellent map of Pinang 
is based, we find the height of Gunong Jerai (Kedah Peak) given at 
3894 feet, which is probably nearly correct. From a recent trigo¬ 
nometrical estimate by Mr. Thomson, it would appear that Gunong 
L6dang (Mount Ophir) is about 4320 feet high,f at least 1300 feet 
lower than the height given by Captain Newbold. The height of 
the most southern mountain, G. Pulai, has been trigonometrically 
ascertained by Mr. Thomson to be 2152 feet. 
Climate of Singapore . — We omitted to notice a phenomenon 
peculiar to the southern extremity of the Peninsula. This is the 
warm and enervating winds which frequently blow in the night and 
mornings from the S. E., during the months of June, July and Au¬ 
gust. They are felt most towards the morning; and this, together 
At Teluk Ayer near the beach the layers bored through were 
Soft blue mud with shells,.. .. .. .. 40 feet. 
Bright red clays, alternating with brow n and yel¬ 
low'clays,.. .. .. .. .. .. 60 „ 
At the foot of Government hill near the Convict Lines there was found 
White clays,.. .. .. .. .. .. 20 feet. 
Red id. and lalcrite resting on a very hard white 
cl ay, .* .. .. .. .. •• ^ 
In digging u Tocksing’s Well” nine feet of alluvial sand were found to rest 
on ferruginous gravel similar to that which occurs frequently on the hills 
near Singapore. 
* Tijdschrift voor Neerlands Indie 8 Taar. tl Aft. 
-j* A theodolite observation made by Mr. Thomson on the Malacca shore 
at a distance of29 stat. miles gave a height of 4,320 feet above low water 
mark. Air. Thomson afterwards observed the peak to dip below the hori¬ 
zon when at a distance of 77 miles, and with the eye 3 feet above the level 
of the sea, which would make the height 4,300 feet. Mr. T. adds, in the 
memorandum with which he has furnished us, since the text was printed, of 
these observations and the borings mentioned in the preceding note, that lie 
bad no opportunity of taking more careful observations for the height of Ml. 
Ophir. but that the abo vc cannot have an error of above 50 feet. 
