56 THE MICROSCOPE. 



their intense coloration from the anatomical elements. The author 

 does not venture to assert that these organisms are the same as those 

 which have been described by Birch-Hirschfeld, as the specific 

 organism of syphilis, but he adds that he has met with other bacteria 

 in the pus of soft chancres, longer and more delicate, very much 

 like the bacteria of anthrax but quite distinct from those which he 

 has found in syphilitic productions. 



In the sputa of patients suffering from whooping-cough, M. 

 Burger has found organisms which he regards as pathogenic. They 

 present the form of bacilli, some connected in chains,but most of them 

 disseminated over the field, and giving the idea of micro-organisms 

 in active process of segmentation. They differ from the leptothrix 

 buccalis, the rods of which are both longer and larger, and which 

 occur chiefly about the masses of buccal epithelial cells. In order 

 to demonstrate the supposed bacilli of whooping cough they must 

 be colored by means of an agueous solution of aniline and then with 

 fuchsine or menthyl violet, using solutions which are not too con- 

 centrated. 



From a series of researches on the part played by organisms in 

 the causation of dental caries, M. Miller concludes that they cannot 

 be regarded as the primal agents. Decalcification by acids gen- 

 erated by decomposition, etc., leaves the tissues of the tooth porous, 

 and on it the organisms, bacilli, and cocci, then develop. The 

 bacilli can be traced into the ramifications of the dental canaliculi. 

 They have no power on a tooth otherwise sound. 



FOLIA CAROByE— JAGARANDA CAROBA. 



BY MRS. LOUISA REED STOWELL, IN PART 2 OF " MICROSCOPICAL 



DIAGNOSIS." 



THE Caroba leaves of commerce are obtained from a native 

 tree of Brazil. It belongs to the family Bignoniaceae, and has 

 been honored with a number of names. The correct one probably 

 is Jacaranda Caroba, given it by De Candolle; although the name 

 Jacaranda Procera, given by Sprengel, is in quite common use. 

 Martins called the tree Cybistas Antisyphilitica, and Vellos gives it 

 the appropriate title of Bignonia Caroba. 



The medicinal properties of the tree are found principally in 

 the leaves, and their beneficial effects have been known for a long 



