TABLE OF CONTENTS 
E\DITOR’S PREFACE ; : 3 : 5 
INTRODUCTION ‘ 3 : i : is 4 : 5 
lie CONDITIONS OF ATMOSPHERIC STABILITY: LAPSE RATES 
I) CONSERVATIVE PROPERTIES OF AIR MASSES 
III. THE RossBy DIAGRAM—PLOTTING ROUTINE 
IV. THE Rosspy DIAGRAM—INTERPRETATION 
We ELEMENTS OF FRONTAL STRUCTURE—THE WARM FRONT 
VI. ELEMENTS OF FRONTAL STRUCTURE—THE COLD FRONT. 
VII. ELEMENTS OF CYCLONIC STRUCTURE 
THE NORWEGIAN WAVE-THEORY OF CYCLONES, BY B. HAURWITZ 
FRONTAL WAVES, BY T. BERGERON . 5 5 
SOURCES OF ENERGY FOR EXTRA-TROPICAL CYCLONES, BY T. BERGERON 
A NoTE ON DYNAMIC ANTICYCLONES AND CYCLONES, BY R. G. STONE 
THE ROLE OF THE TROPOPAUSE IN THE DYNAMICS OF EXTRA-TROPICAL 
DISTURBANCES, BY T. BERGERON  . 5 6 
VIII. THE TEPHIGRAM 
RADIOMETEOROGRAPH SOUNDINGS IN THE MIDDLE NortH ATLANTIC 
(after Durandin) . ‘ ; j 
A NOTE ON ESTIMATING CONDITIONAL AND CONVECTIVE INSTABILITY 
FROM THE WET-BULB CURVE, BY R. G. STONE . 
IX. Synoptic ASPECTS OF THE THUNDERSTORM 
AIRPLANE SOUNDINGS ILLUSTRATING CONVECTION (after Kochanski) 
THE IcE-NUCLEI THEORY OF RAINFALL, BY R. G. STONE . 
HAIL FORECASTING (after United Air Lines) . 5 ‘ 
ili 
