2 ETON NATUKE-STUDY 



PART II THE SUN (continued) 



Should an opportunity arise, make a further record as to the 

 position of the sun. Mark the window and floor accordingly. (See 

 Part I, pages 20 and 22.) 



Note: This observation should be repeated at short intervals 

 whenever the sun can be seen. 



PART III A POTATO TUBER 

 PREPARATIONS FOR WORK 



Potato tubers of moderate size should be obtained ; some of these which have 



begun to sprout will be planted during the 

 lesson in boxes filled with earth and having 

 one side of glass. Arrangements should be 

 made for covering the glass so that the light 

 is excluded when the potato is not being 

 examined. As an alternative, especially when 

 the observations are not to be continued 

 during the summer, the potato may be sus- 

 pended in a glass or jar over water. A 

 strip of solder will serve to support the tuber, 

 if twisted round it and the ends bent so as 

 There should be one specimen at least for every 



FIGURE 139. A Potato tuber. 



to hook over the sides of the jar. 

 two pupils. 



DIRECTIONS TO THE PUPIL 



(2) Treat the potato as you have your specimens in previous lessons. 

 Put down headings in your note-book with regard to its size, shape 

 and colour. Make sketches as usual and add your observations 

 upon the external appearance of the specimens. 



