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camphorated emanations, should play a very important part in improv- 
ing the health of malarious districts.” It has the property of absorbing 
directly and rapidly the water of shallow marshes, thus preventing the 
fermentations which are produced, and paralyzing the animal miasma 
proceeding from them which might arisefrom them. The predictions with 
this regard, which were made in 1869, have in all cases been realized. 
The author furnishes a few of the numerous results, which are very 
interesting. 
The English were the first to experiment in their sanitary plantations 
in Cape Colony, where they were eminently successful. Two or three 
years were found sufficient to change the climatic conditions, and the 
aspect of the malarious districts of their possessions. 
Some years ago the Algerians took occasion to spread the Hucalyptus 
throughout the French possessions in Africa, and the following are 
some of the results obtained, as communicated by M. Trottier: 
“ About 20 miles from Alger, at Pondouk,” he says, ‘‘ I owned a prop- 
erty situated near the river Hamyze, the emanations from whieh pro- 
duced intermittent fever among the farmers and their servants every 
year. Inthe spring of 1867 I planted upon this farm 13,000 plants of 
the Eucalyptus globulus. In July of that year, the season in which the 
fevers appear, the farmers were completely free from them. In the 
mean time the trees had scarcely attained a height of more than 8 or 10 
feet. Since that time the settled population has been entirely free from 
fevers.” 
Fourteen thousand Eucalyptus trees were planted upon the farm of 
Ben Machydlin, in the vicinity of Constantine. It has for several 
years past been noted for its insalubrity, being surrounded with marshes 
throughout the entire year. ‘The trouble entirely disappeared and the 
soil became perfectly dry in five years. The atmosphere is constantly 
charged with aromatic vapors, the farmers are no longer troubled with 
disease, and their children are bright with health and vigor. 
The operations of the manufactory of Gué in Constantine were ren- 
dered wholly impracticable during the summer on account of the pesti- 
lential emanations from the marshes with which it was surrounded. M. 
Saulier conceived and put into practice the idea of planting a large 
number of ELucalyptus trees in these marshes, and in three years about 
twelve and a half acresof the marshy soil were converted into a mag- 
nificent park. The water completely disappeared, and the health of the 
workmen has since been in good condition. 
In consequence of the large grove of Hucalyptus globulus on the farm of 
Maison-Carrée, which is situated in a district in which the inhabitants 
formerly succumbed tothe malaria, similar hygienic revolutions have 
taken place. 
It is stated by land-owners in Cuba that there also the paludal and 
telluric diseases have disappeared from the malarial districts where the 
Eucalyptus has been cultivated. 
According to Ramel, Australia is very healthy where the Hucalyptus 
flourishes, and unhealthy where the tree is not found. 
On the banks of the Var, near the entrance of a railroad-bridge, is 
situated a garrison-house, near which earth-works were thrown up to 
dam the river in order to build the bridge. The malaria arising from 
it made it necessary to change the guard each year. ‘Two years ago M. 
Villard, the engineer in charge of that section of the road, planted 40 
trees in the vicinity of the building, and since that time this post has 
been the most healthy in the country. 
These evidences fully establish the fact that the Hucalyptus globulus 
