Hadley, Horsburgh, Piddington, Reid, the 'Voyage of the Adventure and Beagle,' and a few others. In all other cases the difficulty of reproducing an Author's words, after a double translation, is the only apology which can be offered for the inaccuracies which are unavoidable.

I have, lastly, to express my obligations to the Meteorological Department of the Board of Trade for their liberality in defraying a portion of the expense of the publication of this translation.

DUBLIN: June 28, 1862.

THE TRANSLATOR.

CONTENTS.

INTRODUCTION.

ORDINARY WINDS AND ROTATORY STORMS

INFLUENCE OF THE ROTATION OF THE EARTH ON THE DIRECTION OF

THE WIND

PAGE

3

7

18

36

THEIR CAUSE IS TO BE SOUGHT FOR IN THE RAREFACTION OF

THE AIR OVER CENTRAL ASIA IN SUMMER

50

2. THE WEST MONSOONS OF THE LINE

65

3. THE LATERAL DEFLECTIONS OF THE TRADE-WIND

GENERAL VIEW OF THE WINDS OF THE TORRID ZONE

67

73

III. THE CHANGEABLE WINDS.

GENERAL CONSIDERATIONS

77

1. THE TWO CURRENTS, EQUATORIAL AND POLAR.

79

2. THE LAW OF GYRATION ON THE NORTHERN HEMISPHERE

3. THE LAW OF GYRATION ON THE SOUTHERN HEMISPHERE

87

107

PAGE

4. THE VARIATIONS OF THE METEOROLOGICAL INSTRUMENTS WHICH

DEPEND ON THE LAW OF GYRATION

118

THE EFFECT OF THE FALL OF RAIN OR SNOW ON THE IN-

STRUMENTS

138

5. EFFECT OF THE MOTION OF A SHIP ON OBSERVATIONS OF THE

LAW OF GYRATION

CURRENTS AT DIFFERENT LEVELS

THE LAW OF STORMS.

1. STORMS OF THE TORRID ZONE, AND THEIR EXTENSION INTO THE

TEMPERATE ZONE

144

151

157

PROOF OF THE EXISTENCE OF ROTATORY MOTION IN THE STORM

2. STORMS WHICH ARISE FROM THE CONFLICT OF CURRENTS AT THE

OUTER EDGE OF THE TRADE-WIND ZONE

221

3. STORMS PRODUCED BY THE LATERAL INTERFERENCE OF TWO CUR-

Errata.

Page 38, line 3 from foot, for Halley read Hadley.

64, 16 100, 16

tension increase of tension.
1829
1729.

128, the table for Ogdensburgh should precede the notice of Toronto.