ALGJE. 



i6g 



them, even on elevations of over one hundred feet, 

 everybody had the ague. The course of this disease 

 seemed pari passu with that of the plant." Shortly 

 after this period Dr. Bartlett read a communication 

 before the Chicago Society of Physicians and 

 Surgeons, in which he fully described what he be- 

 lieved to be the ague-plant ;^ 

 whilst, from the details and 

 descriptions, American bota- 

 nists arrived at the conclu- 

 sion that the plant described 

 was no other than the well- 

 known fresh-water alga, 

 called Botrydiinii granu- 

 latum. This had already 

 been described and figured 

 from British specimens, irre- 

 .spective of any suspicion 

 that it was associated with 

 the ague.^ It is unnecessary 

 to enter upon any details 

 of the structure here, since 

 they are available in books // i\ 

 on the subject,^ especially as 

 the charges have not been 

 established. The mud sent over by Dr. Bartlett was, 

 however, submitted for examination to a most accom- 

 plished authority; and in 1874 Mr. William Archer 

 confirmed the opinion that the "ague-plant" in 



Fig. 29. — Botyydiuiit granulatitin, 

 with zoospores. 



' Grevillea (1874), vol. ii. p. 142. 



« Ibid. (1872), vol. i. p. 103, pi. 7. 



» Cooke's "British Fresh Water Alg?e," p. 114. 



(1SS4.) 



