62 LABORATORY PRACTICE CHAP, xi 



4. What do these layers represent? 



5. The bud or young leaves at the very centre. 



6. Make a sketch of one of the cut surfaces. 



XI. Cut a bulb of the Hyacinth or the Onion across the 

 middle. Examine one of the cut surfaces and notice : 



1 . The concentric arrangement of the coats and 



2. How closely they are applied one to the other. 



3. The Hyacinth and Onion represent what are called 



tunicated bulbs. 



XII. i . How may we distinguish between a corm and a 

 bulb ? 



2. Write down the best definition you can find for each. 



3. How may we distinguish between tunicated and scaly 



bulbs ? 



4. Examine the so-called bulbs of the Tuberose, the Tulip, 



the Star-of-Bethlehem, the Soap- Root, the Dog-tooth 

 Violet, and any others obtainable, and name each 

 correctly. 



XIII. Take a Radish, Carrot, or Beet, examine the un- 

 derground portion carefully, and notice : 



1. The size, shape, and color. 



2. Any markings upon the surface. 



3. Make a sketch. 



4. Is the part studied root, stem, or leaf ? 



5 . Write down your answer and give your reasons for it. 



6. How long does the Carrot, Radish, or Beet live? 



XIV. How is nourishment stored up in the seed for the 

 use of the embryo ? 



