VI TABLE OF CONTENTS. 



Instruments : Reorganization of French Observatories, 14 ; Liverpool Ob- 

 servatory, 19 ; Edinburgh, 62 ; Tashkend, 17 ; Cincinnati, 15, 3-1 ; Columbia 

 College, IG; Alleghany, Regulation of Time by, IG; Annual Report of, 21; 

 Prime Vertical Transit at Lisbon, 57; Power of Small Telescopes, 152; 

 Mending a Broken Ubject-glass, 175. 



B. TERRESTRLIL PHYSICS AND METEOROLOGY (xxvi, xxvii) G3 



(a.) TERRESTRIAL PHYSICS. 



The Land. Earthquakes: Earthquake Waves, 65 ; inltaly,92; Fo?canof 5; 

 Eruption of Vesuvius, 26; in Iceland, 201 ; Miscellaneous : Amount of Force 

 derived from the Sun's Heat, 63 ; Rate of Increase of Heat in Penetrating 

 the Earth, 65 ; Influence of Forests on the Temperature of the Ground, 8 ; 

 Local Deviation of the Plumb-line, 91 ; Foucault Pendulum Experiment, 

 95 ; Density of the Earth, 120 ; Terrestrial Magnetism : Terrestrial Mag- 

 netism and Barometric Fluctuations, 149; Secular Magnetic Variation in 

 New York, 174 ; Connection of Sun Spots and Auroras with, 46, 47 ; Ground 

 Currents and the Aurora of 1872, 13 ; Electric Storm of Jan. 7, 1873, 71. 

 The Interior Waters : Observations on River Temperatures, 63, 64 ; Com- 

 position of Dead Sea Water, 179. The Ocean : Cruise of School-ship Mer- 

 cury, 65 ; Secular Variation in Level of Ocean, 92 ; Movement of Waves in 

 Oceans and Harbors, 118 ; Anti-Gulf-Stream in West Indies, 121 ; Cold Cur- 

 rent off Coast of Brazil, 122 ; Effect of Ocean Currents on the Climate of 

 Norway, 99 ; Storm Chart of the Atlantic, 123. See also the Ocean, under 

 Geoguapiiy. 

 (b,) METEOROLOGY. 



General Climatolog'y : Meteorology in Canada, 76 ; in Russia, 77 ; in the 

 Argentine Republic, 78 ; in Havana, 82 ; American Signal-service Weather 

 Bureau, 74; International Weather Telegraphy, 78; Prestelon Storm Warn- 

 ings, 101; Descriptive Meteorology, 116; Dove on Climate, 79; Climate of 

 Norway as affected by Ocean Currents, 99 ; Influence of Moon on Weather, 

 98; of Sun Spots, 100, 123; Cyclones and Water-spouts, 107 ; Storm Charts of 

 the Atlantic, 123 ; Storms of Northern Europe, 87 ; Great Nova Scotia Storm, 

 97; Meteorology of the Doldrums, 117; Diffusion of Carbonic Acid in the 

 Air, 167 ; Blue Color of the Sky, 230. 



Atmospheric Electricity : Sources of, 82, 113 ; Edlund's Theory of, 114; 

 Silent Dissipation of, 173 ; Dangers of Lightning, 90 ; Lightning Conduct- 

 ors, 111 ; Lightning Strokes, 113 ; Analysis of Lightning Flash, 127 ; Meas- 

 ure of its Duration, 128. 



Atmospheric Pressure and the Winds : Barometric Determination of 

 Altitudes, 91 ; Semidiurnal Variation of the Barometer, 103 ; New Barome- 

 ter, 116; Relation between Barometric Fluctuations and Terrestrial jNIag- 

 netism, 149 ; Balloon Ascensions, 95, 96, 124 ; Upper Currents of Air, 104 ; 

 Easterly Current in England, 88 ; Typhoons of China and Japan, 105 ; Cy- 

 clones, 107 ; Transfer of Sand from Africa to Italy by Sirocco, 233. 



Temperatures : Discordance in Arctic Temperatures, 67 ; Variation in 

 the Heat of the Earth at DifTerent Depths, 65 ; Influence of Forests on Tem- 

 perature of the Ground, 81; Solar Heat reflected from Lake Geneva, 155; 

 Line of I'crpctual Snow, 85. 



Moisture: Rain-fall in Jerusalem, G7; Drying up of Santa Cruz, 71; 

 Rain-fall and tlie Barbadoes Sugar-crop, 109 : Sun Spots and Rain-fall, 123; 



