A Study of Celery* 1 1 7 



22. Did you ever see potatoes, onions, and turnips which 

 have sprouted in dark cellars in the winter ? 



23. How did they look ? 



24. Taste of the white end and of the green leaf an<l 

 stem. How do they differ in taste ? How in texture 

 (toughness) ? 



25. The sunlight has done what to the tops of the celery? 



26. Break the stem. Is it brittle ? 



27. Does it break with a clean or a ragged break ? 



28. What do you see at the end where it broke ? 



29. How many threads do you see ? 



30. How long are they ? 



31. Pull out a fibre and see if it breaks easily. It is 

 tenacious. 



32. Look where the three branches of the stem begin 

 (Fig. 31, 15). 



33. Break the stem at this joint. Are there as many 

 threads (fibres) here as there are below ? . 



34. Cut the stem at different places and see how many 

 threads are there. 



35. Make many slices, beginning just below the joint and 

 going on until you find all three branches. 



36. Note how the threads mix, cross, and intercross as 

 they go upward toward the leaves (Fig. 31, 1-12). 



37. Notice that these threads are in two rows one on 

 the outside, one near the surface. 



38. Make these sections and draw each one. 



39. Describe the threads (tough, elastic, etc.). 



40. Notice that the body of the stem is white and full of 

 holes (spongy). 



41. See the open place inside the middle stem far up to- 

 ward the leaf. 



42. Press a leaflet and draw it. 



43. Are leaflets alike on both sides ? 



44. Is the stem as thick on one edge as on the other ? 



45. Why ? Because the thinner edge is in between the 

 neighboring leaves, while the thicker one is out by itself. 



