Madagascar | Observatoire | Tananarive. Mauritius | Royal Alfred Observatory | Pamplemousses. Union of South | Meteorological Branch, Irrigation | Africa | Department | Johannesburg. | | _Asia_:— | | | | India | Meteorological Department | Calcutta. Japan | Central Meteorological Observatory | Tokyo. Ceylon | Surveyor-General’s Office | Colombo. Hongkong | Observatory | Hongkong. China | Imperial Maritime Customs | Peking. ” | Observatoire de Zi-ka-wei | Shanghai. Philippine Islands | Weather Bureau | Manila. Dutch East Indies | Magnetic and Meteorological | Batavia. | Observatory | | | _Australasia and | | Pacific_:— | | | | Australia | Commonwealth Meteorological Service| Melbourne. New Zealand | Meteorological Office | Wellington. Hawaii | Weather Bureau | Honolulu. ===================+====================================+================ In addition to the above, which are regular government services specially organised for publishing and utilising the data from numerous observing stations, there are many isolated stations in all parts of the world. There are no colonies which do not possess some meteorological stations, and at many mission stations meteorological observations are made. It would always be well for a traveller to try to ascertain where in the vicinity of his route meteorological stations have been established and over what period of time their records extend. In the Table (pp. 44-49), taken from Marriott’s “Hints to Meteorological Observers,” is given the relative humidity for every 2° of temperature from 20° to 80°, and for every two-tenths of a degree of difference between the dry and wet-bulb readings from 0°·2 to 18°·0. To use the Table: Look in the column on the left or right for the nearest degree to the dry-bulb reading; then carry the eye horizontally along until the column is reached corresponding to the difference between the readings of the dry and wet-bulb thermometers, when the relative humidity will be found. Intermediate readings can be interpolated in the usual way.