6S Aéronautic Ascension of Mr. Green 
now before me is black, its fracture conchoidal, and structure cel- 
lular; the interstices partly filled with iron ochre. Manganese 
seems to pervade the newest as well as the oldest rocks. Brong- 
niart mentions it in chalk ; the black oxide has been detected in 
the Orkney Islands, and the gray in the slate mountains of Cum- 
berland. The geological position of this coal formation is above 
the encrinal, and below the magnesian limestone. 
While on the subject of localities of rare minerals, it may not 
be amiss to mention that diallage (forming a subordinate bed in 
mica schist) was met with three or four years ago by Dr. Bowie at 
Craig Cailleich in the Highlands, and at Castle Hill near Kes- 
wick, by Mr. Jos. Fryer, who has also noticed veins of beautiful 
vellow ferrugineous quartz in the grauwacke at Langholm, bor- 
dering on Scotland. Yours, &c. &c. 
N. dew. 
AERONAUTIC ASCENSION OF MR. GREEN IN HONOUR OF 
HIS MAJESTY’S CORONATION. 
{His own Account of his Aérial Voyage. } 
The balloon with which T ascended was 31 feet in diameter, as 
near the size as possible of the one with which Lunardi first made 
an ascension in England. It was inflated with about 1200 cubic 
feet of carbonated hydrogen gas, supplied from the main pipes of 
the original chartered Gas Compatty, and I am much indebted 
to the gentlemen of the Committee for their kind assistance du- 
ring the operation of filling. I had no doubt of being able to 
ascend with the gas, having, since the period when I first con- 
ceived the idea that common gas would answer the purposes of 
aérostation, made frequent experiments, all of which completely 
succeeded ; nor was my ardour damped when I knew that, even 
within an hour of my ascension, persons of great experience in 
aérostation expressed their opinion that I should not be able to 
ascend. 
About five minutes before one o’clock the ropes were divided ; 
and having taken my seat in the car, the balloon rose in a ma- 
jestic manner, nearly perpendicularly. The almost deafening 
shouts of the populace, and the roar of cannon that took place 
when I had ascended a considerable distance from the earth, 
agitated the balloon. I felt the effect of it most sensibly. The 
moment the discharge of cannon took place, I knew it was the 
signal to be given when the Crown was set upon the head of my 
most gracious Sovereign, and I drew the cork ofa bottle of brandy, 
and, having poured out a full glass, I drank ‘* Health, long life, and 
a glorious reign to His Majesty.” The effect of the air upon the 
brandy is worthy of notice: when I drew the cork, a report tock 
place, which I attribute to the rarification of the air, similar to 
that 
