RESPIRATION. 



52. Production of carbon dioxide in respiration. -Germinating seeds were placed 

 in two stoppered bottles on the previous evening. 



(a) A burning match is introduced into the first bottle. 



(6) Carbon dioxide is poured from the second bottle on to the surface of clear 

 lime-water with which it is then shaken up. 



53. Carbon dioxide produced in respiration used up by a green plant in sunlight 

 for photosynthesis. Two stoppered glass jars each containing leaves and some lime- 

 water : (a) kept in darkness ; (b) in sunlight. 



54. Demonstration of the heat produced by the respiration of germinating seeds, 



13 



