its fire. Warm winds afterwards blowing over that frozen surface will
be chilled by it. Could that frozen surface be turned under, and
a warmer turned up from beneath it, those warm winds would not be
chilled so much.
The surface of the earth is also sometimes much heated by the sun:
and such heated surface not being changed heats the air that moves
Seas, lakes, and great bodies of water, agitated by the winds,
continually change surfaces; the cold surface in winter is turned
under by the rolling of the waves, and a warmer turned up; in summer,
the warm is turned under, and colder turned up. Hence the more equal
temper of sea-water, and the air over it. Hence, in winter, winds
from the sea seem warm, winds from the land cold. In summer the
Therefore the lakes north-west of us, as they are
not so much frozen, nor so apt to freeze as the earth, rather
moderate than increase the coldness of our winter winds.
The air over the sea being warmer, and therefore lighter in winter
than the air over the frozen land, may be another cause of our
general N. W. winds, which blow off to sea at right angles from our
North-American coast. The warm light sea air rising, the heavy cold
land air pressing into its place.
Heavy fluids descending, frequently form eddies, or whirlpools, as
is seen in a funnel, where the water acquires a circular motion,
receding every way from a centre, and leaving a vacancy in the
middle, greatest above, and lessening downwards, like a speaking
trumpet, its big end upwards.
Air descending, or ascending, may form the same kind of eddies,
or whirlings, the parts of air acquiring a circular motion, and
receding from the middle of the circle by a centrifugal force, and
leaving there a vacancy; if descending, greatest above, and lessening
downwards; if ascending, greatest below, and lessening upwards; like
a speaking trumpet, standing its big end on the ground.
When the air descends with violence in some places, it may rise with
equal violence in others, and form both kinds of whirlwinds.
The air in its whirling motion receding every way from the centre or
axis of the trumpet leaves there a vacuum, which cannot be filled
through the sides, the whirling air, as an arch, preventing; it must
then press in at the open ends.
The greatest pressure inwards must be at the lower end, the greatest
weight of the surrounding atmosphere being there. The air entering
rises within, and carries up dust, leaves, and even heavier bodies
that happen in its
The bush round the feet of them seems to be a great spray of water made by the violence of descent, like that in great falls of water from high precipices.Page 47
Four square feet of sheet-lead sinking in water _broadways_, cannot descend near so fast as it would _edgeways_, yet its weight in the hydrostatic balance would, I imagine,.Page 58
May not then the great quantity of electricity, brought into the polar regions by the clouds, which are condensed there, and fall in snow, which electricity would enter the, earth, but cannot penetrate the ice; may it not, I say, (_as a bottle overcharged_) break through that low atmosphere, and run along in the vacuum over the air towards the equator; diverging as the degrees of longitude enlarge; strongly visible where densest, and becoming less visible as it more diverges; till it finds a passage to the earth in more temperate climates, or is mingled with their upper air? 25.Page 60
Allowing the fact so repeatedly observed by Mr.Page 98
page 94.Page 121
_ _Published as the Act directs, April 1, 1806, by Longman, Hurst, Rees & Orme, Paternoster Row.Page 139
Falmouth for the captains of the packets, who slighted it however; but it is since printed in France, of which edition I hereto annex a copy.Page 143
Portable soup.Page 148
| | | |----+-------+----+-----+----+------+-----+-----+-----+------------------| | Apr| | | | | | | | | | | 10| | | 62 | | | | | | | | 11| | | 61 | | | | | | | | 12| | | 64 | | | | | | | | 13| | | 65 | | | | | | | | 14| | | 65 | | | | Â° â²| Â° â²| | | 26| .Page 155
| | | | | | --| | 8 | | 75 | | | | | | | | 6| 8 | | | 76 |EbN | S50E | | | | | | --| 12 | | | 77 | | | 7 |35 33|53 52| | | 7| 8 | | | 78 |SEbE| N30W | | | | | | --| 12 | | | 77 | | | 108 |36 6|52 46| | | --| | 4 | | 77 | | | | | | | | 8| 9 | | 75 | 77 |SbE | N49E | | | | .Page 221
The opening was very small, yet it did not keep in the smoke, and all attempts to have a fire in this room were fruitless.Page 232
But there is a German book, entitled _Vulcanus Famulans_, by Joh.Page 239
If the flame is drawn strongly down for a continuance, without whiffling, you may begin to kindle a fire.Page 276
| | k |Keep, kick.Page 279
| ef |Formed by the _lower lip_ against the | | | | | upper teeth.Page 300
A negro slave, in our colonies, being commanded by his master to rob or murder a neighbour, or do any other immoral act, may refuse, and the magistrate will protect him in his refusal.Page 345
"Have these erika considered the consequences of granting their petition? If we cease our cruises against the christians, how shall we be furnished with the commodities their countries produce, and which are so necessary for us? If we forbear to make slaves of their people, who, in this hot climate, are to cultivate our lands? Who are to perform the common labours of our city, and of our families? Must we not then be our own slaves? And is there not more compassion and more favour due to us mussulmen, than to those christian dogs?--We have now above fifty thousand slaves in and near Algiers.Page 353