OBSERVATIONAL LESSON XII 

 PART I A BULB (continued, 3rd investigation) 

 PREPARATIONS FOR WORK 



The growing bulbs will again be required. 



DIRECTIONS TO THE PUPIL 



Once more examine your hyacinth bulb. Measure the length of 

 the shoot, sketch it as before, and date your drawing. 



PART II WATER AND FROST 

 PREPARATIONS FOR WORK 



A supply of river, spring,* and rain water should be at hand, the former taken 

 when the stream is running high. Flasks containing the same quantity of each 

 should be given to the class and arrangements made for boiling and filtering the water. 



DIRECTIONS TO THE PUPIL 



Look at each of the three samples of water labelled A, B and C, and 

 note the differences. Pass each through a filter and note the result. 

 Boil the same amount of the three kinds of water in three separate 

 beakers and write down your observations. The three kinds of water 

 are rain water, river water, and spring water. 



* The best results will be obtained from springs in chalk and limestone districts. 



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