EUCAL YPTUS. 131 



6ANITARY, 



To the planting of Eucalyptus trees in malarial districts 

 has been very generally attributed an ameliorating effect 

 upon human health. This is a question of so much in- 

 terest and importance that it deserves special consideration. 



Malarial fevers have a wide range in the climatic belts 

 adapted to one or another of the Eucalypti. These fevers 

 prevail usually in low or marshy places, where the soil 

 water is not far from the surface, and where there is a 

 prolonged period in the year when the temperature stands 

 constantly above 62 F. Some upland valleys also suffer 

 severly from disorders due to malarial poison. A slight 

 elevation in a malarial country is often more dangerous 

 than the lowest places. 



The malarial germ is doubtless introduced into the 

 human organism both by water and by air. It is probable 

 that foods, such as milk, may also serve as vehicles of in- 

 troduction. 



All forms of malaria are endemic or purely local dis- 

 eases. 



The only exceptions to this are of children born to a 

 parent suffering with malaria, at the time of fecundation of 

 the egg. 



A number of Scotch cases are on record of inherited 

 malarial trouble, in all of them from the father. In this 

 respect malaria resembles the dreadful inheritances of 

 syphilis. {Medical Record, N. V., Fournier, Paris.) 



