78 



THE VOYAGE OF H.M.S. CHALLENGER. 



Hann, Dr. J., 26, 48. 

 Hazen, 41. 

 Heat lightning, 34. 



Height, Barometric Corrections for, 40. 

 High Level Stations, Time of daily maximum tempera- 

 ture at, 8. 

 Humboldt's Isothermal lines, 49. 

 Humidity, 20. 



Icebergs, 51. 



India, Isobars of, for July, 61. 

 Insolation, Wind in relation to, 26. 

 Isobars, Influence of land and water on, 60. 



With reference to height of stations, 45. 



Isothennals, Influence of ocean currents on, 68. 



Lightning, 34. 



Monsoon, 56, 61. 

 Murray, Dr. J., 50. 



Phenomena, Diurnal, 4. 



Monthly, annual, and recurring, 35. 



Pressure, Annual minimum of, in northern hemi- 

 sphere, 59. 



Annual range of mean monthly, 74. 



At High Level Stations, 16. 



Belts of high, 72. 



Condition of maximum and minimum of, 18. 



" Correcting " for daily range of, 24. 



" Correcting " to daily mean, 24. 



Curve in interior of continents, 23. 



Curve with reference to configuration of land, 23. 



Differences of mean monthly, 74. 



Diurnal curves of, over ocean and land in high 



latitudes, 24. 



Diurnal range of, Challenger observations, 15. 



In anticyclonic regions, 20. 



Pressure in relation to distribution of land and water, 73. 



In valleys, 24, 27. 



On Peaks, 24. 



Reducing observations of, to sea level, 40. 



Radiation, 16. 



In anticyclonic areas, 20. 



In deep valleys, 23, 45. 



Over oceans, 27. 



Relation of, to barometric tides, 14. 



Relation of vapour and dust particles to, 7. 



Rain, Diurnal curves, 31. 



In United States and Canada, 62. 



Over open sea and near land, 30. 



Sun, Heating effect of, 21. 



Influence of, on cloud amount, 29. 



Varying heat of, in relation to pressure, 75. 



Temperature, Decrease with height, 40. 



Effect of ocean currents on, 72. 



Influence of ocean currents on, 51. 



Influence of Red Sea on, 53. 



In relation to cloud, 29. 



In relation to wind's velocity, 28. 



Minimum annual, of globe, 72. 



Of air on open sea, 7. 



Where lowest, 50. 



Thomas, Captain, 5. 

 Thunderstorms, 31. 



Valleys, Peculiarity of observations in, 24. 

 Viscosity of air in relation to wind's velocity, 28. 



Werkojansk, Temperature at, in January, 50. 

 Winds, Adjoining anticyclonic region, 60. 



Diurnal velocity over open sea and land, 25. 



Prevailing, 35. 



