KOT1 9 OM 1 Hi: BALD ■ ^ PR] 1"> 



of tli>' malarious conditions that now render 



pi Valley unfit for the occupation of man. None of the spei 



icalyptus can be expected to flourish in the region north of Louisiana. 



I am disposed t" doubt the great febrifugic power of tlii- much talked of 



nd t" question whether it does more than hinder tli<- ground from 



1 nidus for Bporea by keeping it permanently covered by a 



that are filled with gummy matters. Such deposits are 



probably prejudicial t-> the peculiar plants that produce the malaria] spores, 



while, ;it the same time, they favor the retention of permanent moisture 



that also t.-n.l- t< ■ prevent the production <>f malaria. 



I have before this called attention to the fad that it i* n<<t the wetn< 



imp areas that favors the production "t" malaria, but the alternation 



and dryness with the changing seasons. Whatever operates to 



t" any considerable degree, these changes of water level in the 



1 contribute, in the same proportion, t<» the diminution of the 



malaria generated ti 



At j>r.-~ nt the course of events is leading to a considerable reduction in 

 the number of cypn our Western Bwamps. Although the busi- 

 - manifestly in it< beginning, there are some hundreds "t' thousands 

 of cy] cut out of the Bwamps "t" the Mississippi Valley each year. 

 .\ - no replanting, tli • result is to give an advantage t>> the worth- 

 ad in tl-iri.i-l>r ling cottonwoods, pin <'.ik~. and other swamp trees, 



<>r t" leave the swamp open t>> the festering heat of the sun in case these 

 not crowd into the places made vacant by the removal of the 

 cypresses. The extension of this | 1 convert into unshaded 



now made comparatively wholesome by the 

 Ic tii.it tli to them. 



