130 THE ROYAL SOCIETY OF CANADA 



Chart of the Heat Resistance of Endospores for Periods of 1 hour at 



Centigrade. 



70° 75 



80° 



85' 



90' 



95' 



100° 



Source. 



"533" (1) 



"633" 



B. gastrophilus . 



"533" (2) 



"Spore 8" 



"Spore 7". 

 "Spore 1". 



B. petasites 



B. ochraceus. . . . 



B. subtilis 



B. Megatherium. 

 B. liodermos. . . . 



B. plicatus 



B. subtilis 



B. mycoides. ... 

 B. megatharium. 



B. vulgatus 



B. gummosus.. . . 



"634" 



"Spore 19" 



B. anthracis 



B. mesentericus. . 

 B. anthracoides . 



"623" 



B. cereus 



+ 



+ 

 + 

 + 

 + 



+ 



+ 



+ 

 + 

 + 

 + 

 + 



+ 



Royal Vic. Hosp. Dr. Gru- 

 ner — large surface colony. 



do. 



do. — lobed colony. 

 Contamination of B. ochrace- 

 us. 

 Contamination possibly B. 



subtilis. 

 Aerobe isolated from Blackleg 



virus. 

 Dr. Gruner. 

 Dr. Gruner. 

 Dr. Gruner. 

 Dr. Gruner. 

 Amer. Mus. of Nat. Hist. 



(Dr. Winslow). 



do. 



do. 



do. 



do. 



do. 

 Dr. Gruner. 



do. — reticulated growth. 



do. — wrinkled brown 

 growth. 

 Laboratory stock culture. 

 Dr. Winslow. 

 Dr. Winslow. 

 Dr. Gruner. 

 Dr. Winslow. 



