1900] MICROSCOPICAL JOURNAL. Ill 



tuberculosis, and in many cases it is in the neighborhood 

 of the point of inoculation that the wound has taken ef- 

 fect. They conclude that tuberculosis does not act iden- 

 tically as other infectious diseases especially in regard to 

 severe suppurations. They show that blood infection in 

 tuberculous animals is rare. — "Vet. Jour. 1:7." 



Red Color of Plants. — Miss F. G-. Smith in a paper on 

 the distribution of red color in the vegetative part of the 

 New England flora (Science N. S. 11:301), calls attention 

 to the various more or less conflicting views in reference 

 to the red color in certain parts of plants. Miss Smith 

 comes to the conclusion that there are several different 

 reasons for the red color or else it has some significance to 

 which we as yet have no clue. 



Heteroecious Rusts. — H. Klebehn (Zeitsch. f. Pflenzk) 

 1899 : 9) who has experimented with heteroecious rusts 

 finds that the Melampsora populina (Jacq. Lev), which ac- 

 cording to Hardy is connected with Caeoma laricis is not 

 the same as the Melampsora, on the Populus tremula. 

 There appears also to be several specialized forms of Puc- 

 cinia caricis. One of these species produces its aecidia 

 spores upon Ribes. The results of Klehbahn as well as 

 those of Ericksson and other investigators on the relations 

 existing between the teleuto and aecidium stages of our 

 cereal rusts show that many of our species of rust can 

 only be determined in light of cultural experiments. 



Apple Canker.— Wendel Paddock (Bull. N. Y. Agrl. 

 Exp. Sta. 163:) who has conducted some experiments with 

 Apple canker comes to the conclusion that it is caused by 

 Sphaeropsis malorum, a fungus which causes the black 

 rot of apple, pear, and quince fruits. He made cultures 

 of the fungus in agar-agar, and with these cultures pro- 

 duced the disease. 



Udder Bacteria.— Archibald R. Ward (Bull. Cornell 

 Uuiv. Agrl. Exp. Station, 178 :) who has made a study of 



