Ãœber dieses Buch
JOHN EWING TO B. FRANKLIN. 4 January, 1770.
Transmitting Observations of the Transits of Venus
and Mercury. Proposal for an Observatory in
Philadelphia
-
TO NEVIL MASKELYNE. 12 February, 1770.
Containing an Account of Professor Winthrop's Ob-
servation of the Transit of Mercury over the Sun,
November 9th, 1769 .
TO MICHAEL HILLEGAS. 17 March, 1770.
Respecting covering Houses with Copper
JOHN EWING TO B. FRANKLIN. 14 June, 1770
TO SAMUEL RHOADS. 26 June, 1770.
326
328
329
330
332
On the different Quantities of Rain which fell at
different Heights over the same Ground
336
W. SMALL TO B. FRANKLIN. 10 August, 1771.
Opinions of the Ancient Physicians respecting Ca-
tarrhs or Colds
339
To M. LE ROY. 20 April, 1772.
Intended French Voyage to the North Pole. - Mr.
West, President of the Royal Society. - Messrs.
Banks and Solander
TO JOSEPH PRIESTLEY. 4 May, 1772.
Electrical Experiments.—Imperfection of the Abbé
Nollet's Electrical Machine. One on an improv-
ed Construction sent to M. Le Roy
JOSEPH PRIESTLEY TO B. FRANKLIN. 3 June, 1772.
JOSEPH PRIESTLEY TO B. FRANKLIN. 1 July, 1772.
Curious Experiments on Air, and Discoveries of
various Properties
VOL. VI.
JOHN WALSH TO B. FRANKLIN. 12 July, 1772.
Experiments for ascertaining the Electrical Proper-
ties of the Torpedo
J. B. TODERINI TO B. FRANKLIN. 15 August, 1772.
Giving an Account of a Work published by him,
entitled "Filosofia Frankliniana "
Answer to M. Dubourg's Queries respecting the Armonica.
8 December, 1772
348
351
352
353
355
Some Directions for drawing out the Tones from the Glass-
es of the Armonica
On the Stilling of Waves by Means of Oil
TO HUMPHRY MARSHALL. 14 February, 1773.
On the Spots in the Sun; Dr. Wilson's New Hy-
pothesis
368
M. DE SAUSSURE TO B. FRANKLIN. 23 February, 1773.
Conductors of Lightning. - Project of the Royal
Society to ascertain the Attraction of Mountains. -
Volcanic Eruptions.-Experiments on the Torpedo 371
JOHN WINTHROP TO B. FRANKLIN. 4 March, 1773.
Dr. Priestley. Effects of Lightning
To M. DUBOURG. 10 March, 1773.
On the Causes of Colds
To M. LE ROY. 30 March, 1773.
375
Mr. Wilson's Opposition to Pointed Conductors. -
M. Le Roy chosen a Member of the American
Philosophical Society
A new-invented Carriage Wheel. -Explosion of
Melted Iron and Glass Drops in Water.-Stove
for consuming the Smoke.
To M. DUBOURG. 29 June, 1773.
Inquiries on the Causes of Taking Cold
Preparatory Notes and Hints for writing a Paper concern-
ing what is called Catching Ccld
TO SAMUEL COOPER. 7 July, 1773.
Stoves for Public Buildings
TO BENJAMIN RUSH. 14 July, 1773.
Colds produced by Contagion. Various Causes
of Colds
TO THOMAS PERCIVAL. 25 September, 1773.
Unwholesomeness of Manufacturing Establishments.
-Moist Air not unhealthy
JOSEPH PRIESTLEY TO B. FRANKLIN. 26 Sept. 1773.
New Experiments on Air
TO JOHN INGENHOUSZ. 30 September, 1773.
Torpedo. Magnetic Needle. Nairne's Electri-
JOSEPH PRIESTLEY TO B. FRANKLIN. 14 Oct. 1773.
Experiments on Alkaline Air.
ERASMUS DARWIN TO B. FRANKLIN. 24 Jan. 1774.
Communicating a Philosophical Paper
TO THE MARQUIS DE CONDORCET. 20 March, 1774.
Answers to Questions on Philosophical Subjects
TO JOHN BAPTIST BECCARIA. 20 March, 1774.
English Translation of Beccaria's Book. - Ex-
periment to show that Electricity does not pass
through a perfect Vacuum
TO JOSEPH PRIESTLEY.
Effect of Vegetation on Noxious Air
To JOSEPH PRIESTLEY. 10 April, 1774.
On the Inflammability of the Surface of certain
Rivers in America
387
397
411
413
414
415
JOSEPH PRIESTLEY TO B. FRANKLIN. 27 Sept. 1779.
Vegetation of Plants in Water
PIETRO TURINI TO B. FRANKLIN. 18 Sept. 1780.
Communicating Intelligence of a new Work on
423
the Method of Erecting Conductors of Lightning 424
To EDWARD NAIRNE. 13 November, 1780.
Proposing a slowly sensible Hygrometer for cer-
tain Purposes
TO THE MARQUIS TURGOT. 1 May, 1781.
On a new-invented Stove
TO FELIX VICQ D'AZYR. 20 July, 1781.
On the Long Retention of Infection in Dead
Bodies after Sepulture
FELIX VICQ D'AZYR TO B. FRANKLIN. 23 Aug. 1781
TO JOHN INGENHOUSZ. 2 October, 1781.
On Conductors of Heat
An Account of Toads found enclosed in Solid Stone
TO THE ABBÉ SOULAVIE. 22 September, 1782.
On the Theory of the Earth
JOHN INGENHOUSZ TO B. FRANKLIN. 29 Nov. 1782.
Experiment for burning Wire
EDWARD NAIRNE TO B. FRANKLIN. 2 Dec. 1783.
A Hygrometer on a New Construction. - M. De
Luc's Hygrometer
TO DAVID RITTENHOUSE. 15 December, 1783.
On the Comet seen in Yorkshire
TO JOHN INGENHOUSZ. 16 January, 1784.
On Balloons, and their probable Importance
To BENJAMIN VAUGHAN. 29 April, 1784.
Fire supposed to exist in the State of a Subtile
Fluid
426
432
433
437
449
451
452
455
Meteorological Imaginations and Conjectures. May, 1784
Loose Thoughts on a Universal Fluid. 25 June, 1784 458
TO JOHN INGENHOUSZ. 29 April, 1785.
Clock with three Wheels. Gravitation of Bodies 461
TO DAVID LE ROY. August, 1785.
Improvements in Navigation. - Observations on
the Sails and Cables of Vessels; the Models for
their Construction; Means of preserving them
from Accidents at Sea; Methods of giving Mo-
tion to Boats. Gulf Stream. Precautions to
those who are about to take a Voyage at Sea.
-General Reflections on Navigation
Appendix to the above Letter. Remarks upon the Nav-
igation from Newfoundland to New York
TO JOHN INGENHOUSZ. 28 August, 1785.
On the Causes and Cure of Smoky Chimneys
Description of a new Stove for burning Pitcoal, and con-
463
496
505
On Thermometers. 13 September, 1786
WILLIAM HERSCHEL TO B. FRANKLIN. 18 Feb. 1787.
With a Catalogue of new Nebula and Clusters
of Stars
To M. LE Roy. 18 April, 1787.
564
567
569
On Balloons. - Pigeons killed by Lightning . 570
NEVIL MASKELYNE TO B. FRANKLIN. 3 March, 1788.
Concerning Churchman's Theory of the Varia-
ation of the Magnetic Needle
TO JAMES BOWDOIN. 31 May, 1788.
Queries and Conjectures relating to Magnetism
and the Theory of the Earth.
Description of the Process to be observed in making
large Sheets of Paper in the Chinese Manner,
. 571
. 574
577
B