538 TROPICAL HYGIENE, SANITATION, ETC. 



poikllocytosis, melanjemia and enlarged spleen. This is not commonly- 

 held. 



(6) The urine is diminished in quantity and in solids. 



(7) The generative organs act more vigorously. 



(8) Menstruation begins one year earlier with European girls living 

 in the tropics. 



(9) The children of European parents residing in the tropics during 

 the active stages of growth are generally weaker than their brothers 

 and sisters of temperate climes. 



(10) The effects of the sunlight are dealt with elsewhere. During 

 the two to four years of acclimatization tropical residents are especially 

 liable to disease from diminished resistance of both body and mind. 

 Acclimatization for permanent residence of Europeans in the tropics 

 does not take place. 



Anderson's views upon this subject are as follows : — 



(i) When a white species is well adapted to the conditions which 



environ it, it flourishes; when imperfectly adapted, it decays; when 



ill adapted, it becomes extinct. 



(2) When a white man, a native of the temperate zone, goes to 

 the tropics, there occurs a biological reaction of his system to the new 

 environment, and a readjustment of co-ordination between his vital 

 processes. 



(3) In the tropics the white man, individually, can exist ; racially, 

 he cannot exist. 



(4) Acclimatization is not possible. 



(5) No superior race can successfully govern an inferior race 

 superior in numbers with equality before the law. 



(6) Onlv by partial enslavement of the coloured natives, superior 

 in numbers, can the white man rule and govern the tropics, and it is 

 only by relays of fresh representatives that he can continue his 

 sovereignty. 



{7) Xo colony of northern origin has ever been able to lead a 

 permanent and independent existence in the tropics. 



To obtain the best results all excesses must be avoided, while daily 

 baths and exercise should be carried out religiously. 



PATHOLOGICAL EFFECTS OF HOT CLIMATES ON EUROPEANS. 



Those effects not due to parasites are of congestive or nervous 

 origin. The abstraction of heat by the cool evening breezes often 

 causes congestion leading to chills and predisposing to disease. At 

 such times the blood leaves the surface of the body and concentrates 

 in the viscera, such as the spleen and liver, causing congestion in 

 them. Excessive exercise and alcohol will produce the same effects. 



