In the highlands, where some fertile upland tracts produce corn, dates and other fruits, the climate is genial, but elsewhere it is extremely sultry, and on the low-lying coast lands malarious.
The eucalyptus is of quite modern introduction; it has been extensively planted in malarious districts.
The dwellers in a malarious region like the Terai (at the foot of the Himalayas) are miserable,.
One of the most interesting was carried out in 1900 for the London School of Tropical Medicine by Dr Sambon and Dr Low, who went to reside in one of the most malarious districts in the Roman Campagna during the most dangerous season.
The first of these was in 1899, and the subjects were the railwaymen employed on certain lines running through highly malarious districts.