On the Combination of Silicium with Platina, 8c. 185 
- The results in one view are as follow: Apparent time. 
“ D 4H. 
_ Beginning of the eclipse at Greenwich, Nov. 28 21 58 57°77 
Greatest obscuration .. ws = 23 4 15°06 
Apparent conjunction ., oe ae 23 5 30-74 
End of the eclipse my ae -- 29 O11 30-46 
Digits eclipsed at greatest obscuration, on as e 
the north part of the sun’s disc, ao Wee 
The moon will make the first impression on the sun’s west 
limb at 35° 22’ 29” from his zenith. 
In your Magazine for April last, I observed a remark respect- 
ing the probability of an error of 6’ in the place of the. moon’s 
node as given in the Nautical Almanack for 1821, 1822, and 
1823. This induced me to make a calculation of the lunar 
eclipse of the 6th instant; and in comparing the elements as 
obtained by interpolation from the Naut. Alm. with those found 
by calculation from the tables, I found the results differed very 
little. But on further consideration, it occurs to me that the 
error alluded to mast be in the longitude of the node, as given 
for every 6th day, page 3, of each month: and it would appear 
that the computers of this part of the work have neglected a 
certain quantity which is applied to the supplement of the node 
in Burckhardt’s tables, to make the equations additive. 
I am, sir, yours respectfully, 
Aberdeen, Feb. 15, 1822. GEo. INNEs. 
XLIII. On the Combination of Silicium with Platina; and on 
its Presence in Steel. By J. B. BousstncauLt*, 
I, was lately announced by M. Prechtel of Vienna, that he had 
succeeded in melting platina, in refractory crucibles, with an in- 
tense fire; and | therefore hoped (having access to the wind- 
furnace of the laboratory of the School of Mines, in which coke is 
used for fuel) to be able to accomplish the fusion of this metal; 
but the results were different from what I expected. 
Of the Fusion of Platina. 
One gramme of platina was placed in a plain earthen cruci- 
ble ; and alike quantity was put into a crucible lined with char- 
coal, and was covered with charcoal powder. 
_ The two crucibles were set in a wind-furnance, and exposed 
for three hours to a very violent heat. (Under the same cireum- 
stances M. Leboulanger succeeded in fusing a perfect button of 
manganese, ) 
* From the Annales de Chimie et de Physique. 
Vol. 59. No, 287, March 1822. Aa The 
