Letters of Euler to a German Princess, on Different Subjects in Physics and Philosophy, Volume 2

Leonhard Euler, Jean-Antoine-Nicolas de Caritat marquis de Condorcet

Murray and Highley, J. Cutrell, Vernor and Hood, Longman and Rees, Wynn and Scholey, G. Cawthorn, J. Harding, and J. Mawman, 1802 - Science

Contents

• CONTENTS: 1
• Another Objection of the Pyrrhonists against: 8
• Remarks that the Senses contribute to the Increase: 16
• The true Notion of Extension: 24
• Whether this Divisibility in infinitum takes Place: 31
• Reflections on Divisibility in infinitum and: 39
• Letter Pate: 43
• Reflections on the System of Monads: 53
• Conclusion of Reflections on this System: 61
• Reflections on the Analogy between Colours: 69
• How opaque Bodies are rendered visible: 76
• A Summary of the principal Phenomena: 83
• Continuation Different Nature of Bodies: 91
• A XII Reply: 95
• Of positive and negative Electricity Expla: 99
• On the electric Atmosphere: 106
• Electrisation of Men and Animals: 115
• How the fame Globe of Glass may furnish: 124
• The Leyden Experiment: 125
• Explanations of: 133
• Continuation: 140
• On the celebrated Problem of the Longi: 150
• Of Latitude and its Influence on the Sea: 159
• Choice of the First Meridian: 167
• Knowledge of the Longitude from a Calcu: 176
• Second Method of determining the Longi: 184
• Continuation and farther Elucidations: 188
• Letter Page: 193
• Adva ntages of this last Method its Degree: 205
• Declination of the Compass and Manner: 214
• Chart os Declinations Method of empIoyr: 222
• Elucidations respecting the Cause and Varia: 230
• True Magnetic Direction subtile Matter: 239
• Magnetic Vortex Action of Magnets upon: 247
• Action of Loadstones on Iron Phenomenon: 255
• Arming of Loadstones: 261
• The Manner of communicating to Stec: 268
• On the Double Touch Means of preserving: 273
• Construction of artificial Magnets in form: 282
• Difference of Lenses with respect to: 290
• Distance of the Image of Objects: 306
• Of the: 324
• Letter Page: 326
• Of apparent Magnitude of the Visual: 334
• Fundamental Proposition for the construc: 342
• On Telescopes and their Effect: 350
• On the magnifying power of Pocket Glasses: 357
• Determination of the apparent Field: 367
• Of the apparent Field and the Place: 374
• Determination of the magnifying Power: 379
• Aperture of Objective Lenses: 388
• Letter Pag: 396
• Of Compound Objective Lenses: 402
• Second Source of Defect as to Distinctness: 410
• CHI Means of remedying this Defect by compound: 417
• Terrestrial Telescopes with four Lenses: 426
• Precautions to be observed in the construction: 433
• ex Why do the Moon and the Sun appear greater: 441
• An Attempt toward the true Explanation of: 448
• Reason assigned for the Faintness of the Light: 456
• Dimi: 460
• On the Azure Colour of the Heavens: 463
• Refract on of Rays of Light in the Atmosphere: 471
• LETTERS: 492

Popular passages

Page 30 - ... the three angles of a triangle are together equal to two right angles, although it is not known to all.

Page 29 - You know that extension is the proper object of geometry, which considers bodies only in so far as they are extended, abstractedly from impenetrability and inertia ; the object of geometry, therefore, is a notion much more general than that of body, as it comprehends, not only bodies, but all things simply extended, without impenetrability, if any such there be. Hence it follows that all the properties deduced in geometry from the notion of extension must likewise take place in bodies, inasmuch as...

Bibliographic information

• Title: Letters of Euler to a German Princess, on Different Subjects in Physics and Philosophy, Volume 2; Letters of Euler on Different Subjects in Physics and Philosophy: Addressed to a German Princess, Jean-Antoine-Nicolas de Caritat marquis de Condorcet; Letters of Euler to a German Princess, on Different Subjects in Physics and Philosophy, Jean-Antoine-Nicolas de Caritat marquis de Condorcet
• Authors: Leonhard Euler, Jean-Antoine-Nicolas de Caritat marquis de Condorcet
• Translated by: Henry Hunter
• Edition: 2
• Publisher: Murray and Highley, J. Cutrell, Vernor and Hood, Longman and Rees, Wynn and Scholey, G. Cawthorn, J. Harding, and J. Mawman, 1802
• Original from: the New York Public Library
• Digitized: Apr 19, 2006