to either of them; the
reader must not be surprised when we tell him it is air.
Monsieur Amontons, in his _Memoires de l'Academie des Sciences, An.
1703_, has an express discourse to prove, that on the foot of the new
experiments of the weight and spring of the air, a moderate degree of
heat may bring the air into a condition capable of causing earthquakes.
It is shown that at the depth of 43,528 fathoms below the surface of the
earth, air is only one fourth less heavy than mercury. Now this depth of
43,528 fathoms is only a seventy-fourth part of the semi-diameter of the
earth. And the vast sphere beyond this depth, in diameter 6,451,538
fathoms, may probably be only filled with air, which will be here
greatly condensed, and much heavier than the heaviest bodies we know in
nature. But it is found by experiment that, the more air is compressed,
the more does the same degree of heat increase its spring, and the more
capable does it render it of a violent effect; and that, for instance,
the degree of heat of boiling water increases the spring of the air
above what it has in its natural state, in our climate, by a quantity
equal to a third of the weight wherewith it is pressed. Whence we may
conclude that a degree of heat, which on the surface of the earth will
only have a moderate effect, may be capable of a very violent one below.
And as we are assured that there are in nature degrees of heat much more
considerable than boiling water, it is very possible there may be some
whose violence, farther assisted by the exceeding weight of the air, may
be more than sufficient to break and overturn this solid orb of 43,528
fathoms, whose weight, compared to that of the included air, would be
but a trifle.
Chymistry furnishes us a method of making artificial earthquakes which
shall have all the great effects of natural ones; which, as it may
illustrate the process of nature in the production of these terrible
phenomena under ground, we shall here add.
To twenty pounds of iron filings add as many of sulphur; mix, work, and
temper the whole together with a little water, so as to form a mass half
wet and half dry. This being buried three or four feet under ground, in
six or seven hours time will have a prodigious effect; the earth will
begin to tremble, crack, and smoke, and fire and flame burst through.
Such is the effect even of the two
_New-York, Sept.Page 6
There was always a particular affection between my father and him, and I was his godson.Page 49
The proposal was agreeable to me, and I consented; his father was in town and approved of it; the more, he said, as I had great influence with.Page 56
He had printed an address of the house to the governor in a coarse, blundering manner; we reprinted it elegantly and correctly, and sent one to every member.Page 57
I see this is a business I am not fit for.Page 60
I let her know that I expected as much money with their daughter.Page 108
The office of justice of the peace I tried a little, by attending a few courts and sitting on the bench to hear causes; but finding that more knowledge of the common law than I possessed was necessary to act in that station with credit, I gradually withdrew from it, excusing myself by my being obliged to attend the higher duties of a legislator in the Assembly.Page 131
With these coals they had made small fires in the bottom of the holes, and we observed among the weeds and grass the prints of their bodies, made by their lying all round with their legs hanging down in the holes to keep their feet warm, which with them is an.Page 143
For though Shirley was not bred a soldier, he was sensible and sagacious in himself, and attentive to good advice from others, capable of forming judicious plans, and quick and active in carrying them into execution.Page 144
Franklin," said he, "I find a _low seat_ the easiest.Page 151
Even in this uncertain state, his passion to be useful to mankind displays itself in a powerful manner.Page 155
In conformity to the instructions which he had received from the legislature,.Page 157
The trade with the Indians, for which its situation was very convenient, was exceedingly lucrative.Page 192
_ It is hard to say what they would do.Page 193
The colonies were recommended to Parliament.Page 205
Thus when Ulysses tells Eumaeus, who doubted the truth of what he related, "If I deceive you in this, I should deserve death, and I consent that you should put me.Page 212
Do we come to America to learn and practise the manners of barbarians? But this, barbarians as they are, they practice against their enemies only, not against their friends.Page 215
But then, as there are some eyes which can find nothing marvellous but what is marvellously great, so there are others which are equally disposed to marvel at what is marvellously little, and who can derive as much entertainment from their microscope in examining a mite, as Dr.Page 219
Franklin's instructions, spoken of above, related to this gracious option.