_Injury from Frost and Methods of Protection._ W. H. HAMMON. 8vo. 1896. Pp. 12. _Some Climatic Features of the Arid Regions._ WILLIS L. MOORE. 8vo. 1896. Pp. 19. _Investigation of the Cyclonic Circulation and the Translatory Movement of the West Indian Hurricanes._ The late REV. BENITO VIÑES, S. J. 8vo. 1898. Pp. 34. Requests for weather maps, _Bulletins_, and other publications of the Weather Bureau should be sent to the Chief of the Weather Bureau, Washington, D. C. All requests are dealt with on their merits, and in cases where it is deemed that effective use will be made of the publications they are usually sent free of charge. INDEX. A. Anemometer, 38-41. Aneroid barometer, 23, 24. Anticyclones, 76. ———— and pressure changes, 141. ———— and temperature, 104-106. ———— and weather, 109-112. ———— and wind circulation, 98-100. ———— form and dimensions of, 96-98. ———— progression of, 111, 112. ———— tracks of, 111, 112. B. Backing winds, 118. Barograph, 36, 37. ———— records, 37, 38. Barometer, aneroid, 23, 24. ———— corrections, 33, 34. ———— mercurial, 19-23, 32, 33. ———— reduction to freezing, 143, 144, 166, 167. Barometer reduction to sea level, 144, 145, 168-170. Buran, 75, 76. Buys-Ballot’s Law, 99. C. Cherrapunjee, rainfall at, 138. Clouds and upper air currents, 136, 137. Clouds as weather prognostics, 137. ———— forms and changes of, 136. ———— movements of, 41-43, 46, 95, 136, 137. Clouds, observations of, 5, 9, 41-43, 45, 46. Cold wave, 62, 75, 76, 103, 106. Cold-wave forecasts, 63. Correlations of weather elements, 91-113. Cyclones, 76. ———— and pressure changes, 141. ———— and temperature, 104-106. ———— and weather, 109-111, 113, 114. ———— and wind circulation, 98-100. ———— form and dimensions of, 96-98. ———— progression of, 111, 112. ———— tracks of, 111, 113. ———— tropical, 106. ———— velocity of, 112, 113. D. Dew, 134, 136. ———— point, 30. ———— ———— tables, 142, 143, 146-155. Diurnal variation of temperature, 125-127. Diurnal variation of wind velocity, 130. Doldrums, 29. E. Equipment of a meteorological laboratory, 186. Evaporation, 29. F. Fahrenheit, 12, 13. Ferrel’s Law, 93. Forecasts, cold-wave, 63. ———— weather, 49, 114-124. Franklin, Benjamin, 114, 115. Frost, 135. ———— warnings, 135. G. Galileo, 12, 19. Gradients, pressure, 82-85. ———— temperature, 64-70. ———— vertical temperature, 129. H. Humidity, 29, 132-134. ———— diurnal variation of, 133. ———— relative, 30, 32, 45, 133. ———— relative, and wind direction, 133. ———— tables, 143, 156-165. Hurricane, 100. I. Inversions of temperature, 129. Isobaric charts, 76-82, 85, 95, 96. Isobars, 77-82, 121.