( 4 ) 
The amount of water vapour in the air makes it 
appear hotter in the day and colder in the night than 
it really is. Dressed suitably and taking it easy in the 
shade one experiences little discomfort from the heat 
but exercise in the shade or exposure to the sun quickly 
causes a flow of perspiration. 
The nights are cool enough to necessitate the use 
of a light blanket. 
The rays of the sun are not so powerful as is 
generally supposed and cases of sun-stroke are rare. 
Englishmen invariably nise sun helmets but Dutchmen 
wear straw hats and are equally immune to solar 
symptoms. 
To the new comer the climate is often ideal. In 
continual summer he sees little to grumble at and he 
puts down the lethargy of the old inhabitant to causes 
other than climate. A few years residence, makes him 
realize that continual summer is enervating and bad 
for the nervous system and that to remain in good tone 
it is necessary for the body to be stimulated by cold. 
The tissues become lethargic and muscles and brain 
refuse to act with the vigor natural in a temperate 
climate. The nervous system becomes run down and 
jumpy and things beneath notice at home are exagge- 
rated to such an extent as to form serious problems. 
Tempers are short and brain storms are frequent- 
insomnia cases are not rare. 
Women, because of their more highly strung 
nervous systems, do not stand the strain as well as men. 
For a healthy life it is necessary for men to have home 
leave at least once in four years and women at least 
once in three. 
