274 TH:^ AMERICAN MONTHLY [Sept 



between the cotyledon and caulicle. First row of cells 

 of embryo nearly isodiametric, filled with oil and protein 

 grains. Others somewhat larger and contain the same 

 substances. Cotyledons incumbent. Central part of 

 of caulicle separated from the rest. Cells of caulicle 

 very much larger than cells of cotyledons. 



Barbarea vulgaris, R. Br. 



Pods erect or slightly spreading, one half to three 

 quarters of an inch long, somewhat quadrangular. Seeds 

 blackish, a line or little more long, a single row in each 

 cell, marginless. Cotyledons incumbent. 



First layer of outer seed coat not well developed, cells 

 elongated in the direction of the seed. Cuticle covers 

 the epidermal cells. On addition of water a slight 

 mucilaginous modification takes place. Second layer 

 with thick lateral w^alls and quite large cell-cavities, 

 colored brown. Third layer of rather thick- walled paren- 

 chyma cells also colored brown, followed by endosperm, 

 as is usual in cruciferous seeds. 



(To be continued.) 



The Diagnosis of Malaria. 



By ARTHUR R. EDWARDS, M. D., 



CHICAGO, ILL. 



The diagnosis of malaria, like its pathogenesis, has a 

 scientific life of scarcely two decades. The subject has 

 been roughly handled since an acquaintance with its 

 microscopic diagnostic methods has reached the general 

 profession from the laboratories of scientific biologists 

 and clinicians. Positive blood findings, i. e., the detec- 

 tion of the Plasmodium of malaria, establishes the fact of 

 malaria, since malaria is always caused by the parasite, 

 and again the organism is always found in malaria and 

 in malaria only. A few microscopic examinations will 



