436 Chemical Analyses. [Ave.. 
4. Bell of St. John’s Cathedral, Calcutta. 
The great bell of this church, whose jarring and discordant sound 
has more than a million times reminded the neighbourhood of its crack- 
ed condition, has at last been removed, and a new bell is about to be 
founded to supply its place, under the superior skill of an eminent Engi- 
neer officer. The metal of which the old bell was composed turns out to 
be of a very brittle nature, and it is not surprising that it should have 
cracked (as recorded) under the effects of a zor-se-fan injunction from 
the delighted minister to the sexton, when it was first set up: it has 
a specific gravity of 8.887, and consists, in a hundred parts, of— 
Coppers, {0.0 se.c0,00/0 in airuabade et afateny stor aish qheieto's\ cielo? tee tees 67.0 
ft ae i RP ARORECCOOR corr oon OD Ce STROD OA COe OS cc 25.0 
PANG core et ea.siciois <sjei6 6% © a siela sieve rb atidtsini aie) eek eafouets aiaiote 8.0 
100.0 
5. Ancient Copper Spear-heads, from Agra. 
An article in one of the English journals of science, some months 
ago, having mentioned, that on analysing ancient weapons of copper, 
found in Germany, the metal was found to be hardened with tin* ; 
I was induced to examine some of the ancient spear-heads, which 
are frequently dug up in the neighbourhood of Htawa, and are refer- 
yed by the natives to the period of the Mahabharat war. Some of 
these presented by Mr. Cracrorr to the Benares Lit. Soc. are describ- 
ed in the Oriental Magazine, for December, 1826. 
Three of them were examined: the exterior colour of all was that of 
unmixed copper. 
No. 1. An arrow head, (so called) broke with a purple granular frac- 
ture: spec. grav, 8.459 at 85°. 
No. 2. A similar weapon, broke with less facility, and had a better 
grain: spec, grav. 8.801. 
No. 3. A spear-head, or kind of sword-blade, true copper colour and 
texture: tough; spec. grav. 8.835. 
Very slight traces of tin were discovered’ on solution in nitric acid, 
but not ponderable, and rather proceeding from slight impurity of the 
metal worked up than from intended mixture—no traces of silver or 
lead were found. The difference of specific gravity was perhaps due to 
the brittle texture of the first specimen, and to the sword-blade 
having been fashioned under the hammer. 
6. New Patent Sheathing Metal for Ships. 
A patent has lately been taken out in England, for a cheap marine 
metal or metallic sheathing, stated to be compounded of lead, antimony, 
and mercury, which seems to have succeeded in the only object which 
* BRANDE’s Journ. xx. p. 296. 
