232 Earthquake. —Sicam Engines in Cornwall. 
The bark of the malambo when incinerated furnished yellowish 
white ashes, which were entirely dissolved with effervescence in 
‘the muriatie acid: the ammonia precipitated from its solution 
a little phosphate of lime mixed with iron ; the sulphuric acid 
afterwards poured into this solution, and the latter evaporated to 
dryness and calcined, gave abundance of sulphate of lime, a little 
silphate of magnesia, and there was also a little silex. This 
hark therefore contains the same principles as the vegetables of 
Europe, and shows that the soil is nearly the same over the 
globe, or at least that vegetables uniformly extract from it the 
same substances. 
The most abundant principle in the malambo hark is the re- 
sin, since it forms one-fifth part of it. In this resin the bitter 
taste resides, and also the chief virtue of the bark. The volatile 
and aromatic oil which accompanies the bitter principle affords 
room to hope that it may be employed as a tonic. But the re- 
sin being very abundant and nauseously bitter, and the volatile 
coil very acrid, the hark must be given at first in small doses and 
with caution. The form most advantageous for administering 
it is that of tincture, mixed with syrup or water and sugar. 
EARTHQUAKE AT THE ISLAND OF MADEIRA. 
By letters from Madeira, dated on the Sth of February last, it 
appears that there was a severe shock of an earthquake felt 
there on the 2d of February. The shock was very violent, and 
lasted four or five minutes, according to different persons. It 
threw down the cross of one of the parish churches, of which 
the walls were also shaken. Other churches and houses were 
damaged in various parts of the island. What appears more sin- 
gular is, that on the 5th of February an American vessel arrived, 
the captain of which related. that on the 2d, about one o'clock 
in the morning, being then about 300 miles from the Azores, and 
700 miles from Madeira, his vessel sustained a shock as severe as 
if it had struck on a rock. The crew were greatly alarmed, and 
the captain sounded immediately, but found no bottom. He was 
perfectly at a loss how te account for this extraordinary circum- 
stance, until after his arrival at Madeira. 
STEAM ENGINES IN CORNWALL. 
By Messrs. Leans’ Report for January, the average work of 
33 engines was 20,694,620 pounds of water lifted one foot high 
with each bushel of coals consumed. _Woolf’s engine at Wheal 
Vor during the same month lifted 47,900,333 pounds, and his 
engine at Wheal Abraham 47,622,049 pounds, one foot high 
with cach bushel of coals. 
By the Report for February the average work of 34 engines 
Was. 
