FERMENTATION. 



57. Action of zymase of yeast. 



(a) Production of carbon dioxide from, glucose shown by passing the gas through 



lime-water. 



(b) Production of alcohol from glucose demonstrated by its smell and by the 



iodoform test. 



(c) Production of heat in fermentation, 



58. Aerobic and anaerobic bacteria. Slope and stab cultures. 



SECRETION AND EXCRETION. 



59. Mucilage. 



(a) Inside water-storage tissue ; 



(6) On the surface of cress seeds, seen both dry and wet. 



