« ZurückWeiter »
Vol. Page. * Letter from Celia Single
II. 536 * On Scandal
II. 539 * A Case of Casuistry
II. 545 * Miscellaneous Observations
II. 549 * Proposals and Queries for the Consideration of the Junto
II. 551 1735. Self-denial not the Essence of Virtue
II. 63 On the Usefulness of the Mathematics
II. 66 On True Happiness
II. 70 1736. On Discoveries
II. 73 The Waste of Life
77 Necessary Hints to those that would be Rich
80 + The Way to make Money Plenty in every Man's Pocket.
II. 82 * Address to the Readers of Poor Richard's Almanac II. 85 On Government
II. 278 1737. On Freedom of Speech and the Press
II. 285 Causes of Earthquakes
. VI. 1
1742. Rivalship in Almanac-Making .
II. 83 Rules of Health
1743. * Proposal for promoting Useful Knowledge among the British Plantations in America.
1744. * Organization of a Philosophical Society
VI. 28 An Account of the new-invented Pennsylvania Fireplaces
VI. 34 1745. On Perspiration and Absorption, and the Motion of Blood in the Heart .
VI. 65 I On the Circulation of the Blood
. VI. 70
Vol. Page. Conjecture as to the Cause why Ships in crossing the
Atlantic have longer Passages in sailing westward,
• VI. 74
ent State of the City of Philadelphia and Province
III. 1 Northeast Storms; Origin of Springs in Mountains ;
petrified Shells in the Appalachian Mountains ;
VI. 79 | Experiments on the Culture of Grass
VI. 83 On the Vis Inertiæ of Matter
VI. 87 IA Conjecture as to the Cause of the Heat of the
Blood in Health, and of the Cold and Hot Fits of
VI. 97 First Letter to Peter Collinson on the Subject of Elec
tricity; Wonderful Effect of Points ; Positive and
V. 181 Observations on the Leyden Bottle, with Experiments V. 189
1748. Advice to a Young Tradesman
II. 87 Further Experiments on Electricity
V. 196 Observations and Suppositions towards forming a new
Hypothesis for explaining the several Phenomena
V. 211 1749. * Proposals relating to the Education of Youth in Pennsylvania
1. 569 Sketch of an English School, for the Consideration of the Trustees of the Philadelphia Academy
II. 125 Magical Square of Squares
VI. 100 Magical Circle
1750. Electrical Experiments; Effect of Lightning on the Needle of Compasses explained
V. 223 Opinions and Conjectures concerning the Properties
and Effects of the Electrical Matter, and the
V. 227 Additional Experiments in Electricity
V. 253 Account of an Accident while making an Electrical Experiment
V. 255 Reasons why Northeast Storms begin at the South VI. 105 Electrical Papers and Experiments
VI. 109 | Inquiries respecting the Mode of planting Hedges VI. 111
1751. Observations concerning the Increase of Mankind, and the peopling of Countries
II. 311 Unlimited Nature of Electric Force
V. 258 Queries and Answers on the Properties of Electricity V. 259 Remarks on Husbandry
1752. Observations on Electricity, and the Sources and Properties of Lightning ·
V. 269 Probable Causes of the different Attractions and Repulsions of two Electrified Globes
V. 275 Reasons for supposing that a Glass Globe charges positively and a Sulphur Globe negatively
V. 280 Supposition of a Region of Electric Fire above the
Atmosphere ; Theorem concerning Light . V. 283 Electrical Kite
V. 295 Concerning the Smallpox in Philadelphia
VI. 120 | Remarks on Mr. Colden's Theory of Light
VI. 121 Physical and Meteorological Observations, Conjectures, and Suppositions
1753. On the Mode of Coating Electrical Jars .
V. 299 An Account of various Electrical Experiments, with Remarks and Explanations
V. 300 On the Motion of the Electrical Fluid in Metals V. 317 Concerning the Light emitted by Salt Water
V. 337 Water-Spouts and Whirlwinds Compared
VI. 145 | Transit of Mercury in 1753 .
VI. 159 | Properties of Water
VI. 160 Reply to Mr. Todd's Observations on a Meteorological Paper
Vol. Page Reply to Mr. Colden's Observations
VI. 180 1 On Smeaton's Air Pump
1754. Papers relating to a Plan of Union of the Colonies,
adopted by Commissioners assembled at Albany III. 22 Three Letters to Governor Shirley
III. 56 Plan for settling two Western Colonies in North America, with Reasons for the Plan .
III. 69 Additional Proofs of the Positive and Negative State of Electricity in the Clouds
V. 340 1755. * An Act for the better Ordering and Regulating such
as are willing and desirous to be united for Military
III. 78 * Dialogue respecting the State of Affairs in Pennsylvania
III. 84 Experiments in Electricity, with Explanations
V. 341 Turkey killed by Electricity ; Effects on the Operator V. 346 Miscellaneous Remarks on Electricity and Lightning V. 347 Pointed Rods; Effect of Lightning on the Church at Newbury
V. 355 Account of a Whirlwind in Maryland
1756. * Plan for saving One Hundred Thousand Pounds II. 89
1757. The Way to Wealth ; being a Summary of the Maxims and Proverbs in Poor Richard's Almanac
II. 92 Observations on Mayz, or Indian Corn
II. 103 Report of the Committee of Aggrievances of the As
III. 97 sembly of Pennsylvania On the Effects of Electricity in Paralytic Cases V. 359 On Cold produced by Evaporation
1758. Electrical Apparatus ; Description of a Battery . V. 361 On the different Strata of the Earth .
VI. 212 Experiments and Remarks respecting Cold produced by Evaporation
sonable creatures, when they build for themselves combustible dwellings, in which they are every day obliged to use fire. In my new buildings, I have taken a few precautions, not generally used; to wit, none of the wooden work of one room communicates with the wooden work of any other room; and all the floors, and even the steps of the stairs, are plastered close to the boards, besides the plastering on the laths under the joists. There are also trap-doors to go out upon the roofs, that one may go out and wet the shingles in case of a neighbouring fire. But, indeed, I think the staircases should be stone, and the floors tiled as in Paris, and the roofs either tiled or slated.
I am much obliged to your friend and neighbour Mr. Lathrop, for his kind present, and purpose writing to him. It is a discourse well written.
I sent you lately a barrel of flour, and I blame myself for not sooner desiring you to lay in your winter's wood, and drawing upon me for it as last year. But I have been so busy. To avoid such neglect in future, I now make the direction general, that you draw on me every year for the same purpose.
Adieu, my dear sister, and believe me ever your affectionate brother,
TO M. DUBOURG.*
On the Nature of Sea Coal.
I am persuaded, as well as you, that the sea coal has a vegetable origin, and that it has been formed
This extract is translated from the French, as printed in M. Dubourg's edition of the author's writings. Its date is uncertain, but it was probably written about the year 1770, and should have been inserted among the philosophical papers of that period.