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Pioneers of Science
Pioneers of Science
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CONTENTS
_PART I_
LECTURE I
PAGE
COPERNICUS AND THE MOTION OF THE EARTH 2
LECTURE II
TYCHO BRAHÉ AND THE EARLIEST OBSERVATORY 32
LECTURE III
KEPLER AND THE LAWS OF PLANETARY MOTION 56
LECTURE IV
GALILEO AND THE INVENTION OF THE TELESCOPE 80
LECTURE V
GALILEO AND THE INQUISITION 108
LECTURE VI
DESCARTES AND HIS THEORY OF VORTICES 136
LECTURE VII
SIR ISAAC NEWTON 159
LECTURE VIII
NEWTON AND THE LAW OF GRAVITATION 180
LECTURE IX
NEWTON'S "PRINCIPIA" 203
_PART II_
LECTURE X
ROEMER AND BRADLEY AND THE VELOCITY OF LIGHT 232
LECTURE XI
LAGRANGE AND LAPLACE--THE STABILITY OF THE SOLAR SYSTEM,
AND THE NEBULAR HYPOTHESIS 254
LECTURE XII
HERSCHEL AND THE MOTION OF THE FIXED STARS 273
LECTURE XIII
THE DISCOVERY OF THE ASTEROIDS 294
LECTURE XIV
BESSEL--THE DISTANCES OF THE STARS, AND THE DISCOVERY OF
STELLAR PLANETS 304
LECTURE XV
THE DISCOVERY OF NEPTUNE 317
LECTURE XVI
COMETS AND METEORS 331
LECTURE XVII
THE TIDES 353
LECTURE XVIII
THE TIDES, AND PLANETARY EVOLUTION 379
ILLUSTRATIONS
FIG. PAGE
1. ARCHIMEDES 8
2. LEONARDO DA VINCI 10
3. COPERNICUS 12
4. HOMERIC COSMOGONY 15
5. EGYPTIAN SYMBOL OF THE UNIVERSE 16
6. HINDOO EARTH 17
7. ORDER OF ANCIENT PLANETS CORRESPONDING TO THE DAYS OF
THE WEEK 19
8. PTOLEMAIC SYSTEM 20
9. SPECIMENS OF APPARENT PATHS OF VENUS AND OF MARS
AMONG THE STARS 21
10. APPARENT EPICYCLIC ORBITS OF JUPITER AND SATURN 22
11. EGYPTIAN SYSTEM 24
12. TRUE ORBITS OF EARTH AND JUPITER 25
13. ORBITS OF MERCURY AND EARTH 25
14. COPERNICAN SYSTEM AS FREQUENTLY REPRESENTED 26
15. SLOW MOVEMENT OF THE NORTH POLE IN A CIRCLE AMONG
THE STARS 29
16. TYCHONIC SYSTEM, SHOWING THE SUN WITH ALL THE PLANETS
REVOLVING ROUND THE EARTH 38
17. PORTRAIT OF TYCHO 41
18. EARLY OUT-DOOR QUADRANT OF TYCHO 43
19. MAP OF DENMARK, SHOWING THE ISLAND OF HUEN 45
20. URANIBURG 46
21. ASTROLABE 47
22. TYCHO'S LARGE SEXTANT 48
23. THE QUADRANT IN URANIBURG 49
24. TYCHO'S FORM OF TRANSIT CIRCLE 50
25. A MODERN TRANSIT CIRCLE 51
26. ORBITS OF SOME OF THE PLANETS DRAWN TO SCALE 60
27. MANY-SIDED POLYGON OR APPROXIMATE CIRCLE ENVELOPED
BY STRAIGHT LINES 61
28. KEPLER'S IDEA OF THE REGULAR SOLIDS 62
29. DIAGRAM OF EQUANT 67
30. EXCENTRIC CIRCLE SUPPOSED TO BE DIVIDED INTO EQUAL AREAS 68
31. MODE OF DRAWING AN ELLIPSE 70
_PART I_
LECTURE I
PAGE
COPERNICUS AND THE MOTION OF THE EARTH 2
LECTURE II
TYCHO BRAHÉ AND THE EARLIEST OBSERVATORY 32
LECTURE III
KEPLER AND THE LAWS OF PLANETARY MOTION 56
LECTURE IV
GALILEO AND THE INVENTION OF THE TELESCOPE 80
LECTURE V
GALILEO AND THE INQUISITION 108
LECTURE VI
DESCARTES AND HIS THEORY OF VORTICES 136
LECTURE VII
SIR ISAAC NEWTON 159
LECTURE VIII
NEWTON AND THE LAW OF GRAVITATION 180
LECTURE IX
NEWTON'S "PRINCIPIA" 203
_PART II_
LECTURE X
ROEMER AND BRADLEY AND THE VELOCITY OF LIGHT 232
LECTURE XI
LAGRANGE AND LAPLACE--THE STABILITY OF THE SOLAR SYSTEM,
AND THE NEBULAR HYPOTHESIS 254
LECTURE XII
HERSCHEL AND THE MOTION OF THE FIXED STARS 273
LECTURE XIII
THE DISCOVERY OF THE ASTEROIDS 294
LECTURE XIV
BESSEL--THE DISTANCES OF THE STARS, AND THE DISCOVERY OF
STELLAR PLANETS 304
LECTURE XV
THE DISCOVERY OF NEPTUNE 317
LECTURE XVI
COMETS AND METEORS 331
LECTURE XVII
THE TIDES 353
LECTURE XVIII
THE TIDES, AND PLANETARY EVOLUTION 379
ILLUSTRATIONS
FIG. PAGE
1. ARCHIMEDES 8
2. LEONARDO DA VINCI 10
3. COPERNICUS 12
4. HOMERIC COSMOGONY 15
5. EGYPTIAN SYMBOL OF THE UNIVERSE 16
6. HINDOO EARTH 17
7. ORDER OF ANCIENT PLANETS CORRESPONDING TO THE DAYS OF
THE WEEK 19
8. PTOLEMAIC SYSTEM 20
9. SPECIMENS OF APPARENT PATHS OF VENUS AND OF MARS
AMONG THE STARS 21
10. APPARENT EPICYCLIC ORBITS OF JUPITER AND SATURN 22
11. EGYPTIAN SYSTEM 24
12. TRUE ORBITS OF EARTH AND JUPITER 25
13. ORBITS OF MERCURY AND EARTH 25
14. COPERNICAN SYSTEM AS FREQUENTLY REPRESENTED 26
15. SLOW MOVEMENT OF THE NORTH POLE IN A CIRCLE AMONG
THE STARS 29
16. TYCHONIC SYSTEM, SHOWING THE SUN WITH ALL THE PLANETS
REVOLVING ROUND THE EARTH 38
17. PORTRAIT OF TYCHO 41
18. EARLY OUT-DOOR QUADRANT OF TYCHO 43
19. MAP OF DENMARK, SHOWING THE ISLAND OF HUEN 45
20. URANIBURG 46
21. ASTROLABE 47
22. TYCHO'S LARGE SEXTANT 48
23. THE QUADRANT IN URANIBURG 49
24. TYCHO'S FORM OF TRANSIT CIRCLE 50
25. A MODERN TRANSIT CIRCLE 51
26. ORBITS OF SOME OF THE PLANETS DRAWN TO SCALE 60
27. MANY-SIDED POLYGON OR APPROXIMATE CIRCLE ENVELOPED
BY STRAIGHT LINES 61
28. KEPLER'S IDEA OF THE REGULAR SOLIDS 62
29. DIAGRAM OF EQUANT 67
30. EXCENTRIC CIRCLE SUPPOSED TO BE DIVIDED INTO EQUAL AREAS 68
31. MODE OF DRAWING AN ELLIPSE 70