with, 140 Reduction of actinometer observations, 142 - - Ther-
mometers for terrestrial radiation, 144 - Meteorological registers,
144 Nomenclature for weather, 147- Occasional observations,
150 Squalls, storms, and hurricanes or cyclones, 150 Winds,
154 - Clouds and fogs, 155 - Temperature of the sea, 155 - Blue
colour of the sea, 156 - Observations in port or on shore, 157 —
Waterspouts, bull's-eye squalls, whirlwinds, 158 - Showers of dust
or ashes, 159 - Thunderstorms, lightning, fireballs, &c., 159 -
Atmospheric electricity, 160 - Auroral phenomena, 161 - Halos,
parhelia, mock-suns, 162 - Zodiacal light and meteors, 162
Table of corrections for capillarity of barometer tube, 163 - Table
of corrections for temperature to barometric readings, 164-5 - Table
of elastic force of aqueous vapour for every degree of temperature,
166 Table of pressures of wind on a square foot for different
heights of the column of water in Lind's wind-gauge, 166 — Table
of factors for reduction to 60° Fahr. in observations with the acti-
nometer, 167 - Table for ascertaining altitudes with the barometer,
with mode of use, 168-9.
Rapid increase in the study of Geography of late years, 190- Defects
pointed out, 190 — Precautions to be used by the geographer in
observing, 191-PHYSICAL GEOGRAPHY, 193-Importance of physi-