ADDENDA 



THE following are supplementary to subjects noticed in 

 this book, and have appeared too late for incorporation in 

 the body of the work : 



Enzymes present in Polyporus squamosus 



From an anatomical study of wood undergoing decay 

 through the agency of Polyporus squamosus^ evidence of 

 the action of enzymes was observed. Buller, who has 

 made an investigation of the subject, has succeeded in 

 proving the presence in the fungus of laccase, tyrosinase, 

 amylase, emulsive, a protease, lipase, rennetase, and 

 'coagulase.' A study of the destruction of the wood of 

 the Sycamore (Acer pseudoplatanus) points to the conclu- 

 sion that the mycelium produces cytase and possibly also 

 a hadromase ; thus the fungus produced eight or nine 

 enzymes, perhaps a greater number than has been found 

 in any other organism. However, Bourquelot has proved 

 the existence of seven enzymes in Aspergillus, namely, 

 invertase, maltase, trehalse, inulase, emulsin, diastase, and 

 trypsin. 



A portion of the fungus cut into thin slices and carefully 



dried at a temperature of about 80 C., after being pre- 

 410 



