The Complete Works in Philosophy, Politics and Morals of the late Dr. Benjamin Franklin, Vol. 1 [of 3]

By Benjamin Franklin

Page 6

electrician and traveller.--Conjectures respecting the pores of
glass.--Origin of the author's idea of drawing down lightning.--No
satisfactory hypothesis respecting the manner in which clouds
become electrified.--Six men knocked down at once by an electrical
shock.--Reflections on the spirit of invention. 301

Beccaria's work on electricity.--Sentiments of Franklin on pointed
rods, not fully understood in Europe.--Effect of lightning on the
church of Newbury, in New England.--Remarks on the subject. 309

Notice of another packet of letters. 313

Extract of a letter from a gentleman in Boston, to Benjamin
Franklin, Esq. concerning the crooked direction, and the source of
lightning, and the swiftness of the electric fire. 314

Observations on the subjects of the preceding letter.--Reasons for
supposing the sea to be the grand source of lightning.--Reasons for
doubting this hypothesis.--Improvement in a globe for raising the
electric fire. 320

Effect of lightning on captain Waddel's compass, and the Dutch
church at New York. 324

Proposal of an experiment to measure the time taken up by an
Electric spark, in moving through any given space. 327

Experiments on boiling water, and glass heated by boiling
water.--Doctrine of repulsion in electrised bodies
doubted.--Electricity

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Text Comparison with The Complete Works in Philosophy, Politics and Morals of the late Dr. Benjamin Franklin, Vol. 1 [of 3]

Page 5
--Positive, and sometimes negative, electricity of the clouds discovered.
Page 7
--In what cases the electrical fire produces heat.
Page 25
He might have added to these lines, one that he has coupled elsewhere, in my opinion, with less propriety.
Page 57
We sailed from Gravesend the 23d of July, 1726.
Page 71
Nearly at the same period, the people demanded a new emission of paper money; the existing and only one that had taken place in the province, and which amounted to fifteen thousand pounds, being soon to expire.
Page 83
The anxiety with which he looked for the result of his experiment, may be easily conceived.
Page 86
Pointed conductors are now very common in America; but prejudice has hitherto prevented their general introduction into Europe, notwithstanding the most undoubted proofs of their utility have been given.
Page 100
Franklin was appointed to present this address, as agent for the province of Pennsylvania, and departed from America in June, 1757.
Page 127
is electrised _positively_ or _plus_, the bottom of the bottle is electrised _negatively_ or _minus_, in exact proportion: _i.
Page 173
--Gunpowder fired by the electric Flame.
Page 178
--By quite dry air, I mean the dryest we have: for perhaps we never have any perfectly free from moisture.
Page 181
May not different degrees of the vibration of the above-mentioned universal medium, occasion the appearances of different colours? I think the electric fluid is always the same; yet I find that weaker and stronger sparks differ in apparent colour, some white, blue, purple, red; the strongest, white; weak ones red.
Page 203
Is not the _aurora borealis_, the flashing of electrical fire from positive, towards negative clouds at a great distance, through the upper part of the atmosphere, where the resistance is least? EXPERIMENTS _Made in Pursuance of those made by Mr.
Page 246
They would only be heated in proportion as such separation could be more easily made.
Page 249
On the ground-floor in the chimney stood a.
Page 263
[81] ESQ.
Page 265
--If one end is held in the hand, and the other a little elevated above the level, a constant succession of large bubbles proceeds from the end in the hand to the other end, making an appearance that puzzled me much, till I found that the space not filled with water was also free from air, and either filled with a subtle invisible vapour continually rising from the water, and extremely rarefiable by the least heat at one end, and condensable again by the least coolness at the other; or it is the very fluid of fire itself, which parting from the hand pervades the glass, and by its expansive force depresses the water till it can pass between it and the glass, and escape to the other end, where it gets through the glass again into the air.
Page 277
Perhaps some permanent advantage might have been obtained, if the electric shocks had been accompanied with proper medicine and regimen, under the direction a skilful physician.
Page 301
398.
Page 311
_Controversy_, benefit of, iii.