NATURE-STUDY LESSONS. 99 



D. Bud-Development. 



In early spring place some twigs of the horse-chestnut with cut ends in 

 water. Change the water occasionally and keep them in a moderately-warm 

 place. Carefully examine the buds as they develop. Compare this home 

 observation with observation of bud-development on trees and other plants 

 outside. 



1 2. Describe the appearance of the buds as they are 

 about to open and compare their appearance at this stage 

 with that of a few weeks previous. 



13. (a) Describe the outermost covering of a bud. 

 {6) Try what effect water has on this covering. 



(c) Infer the use of this gummy covering. 



14. Compare the surface of the buds of the elm, maple 

 and ash with that of the horse-chestnut. 



1 5. («) Observe the changes in the appearance of the 



gum as the bud swells and opens. 



(d) Discover why it is disappearing. 



16. (a) Describe the covering found immediately under 



the gummy substance. 

 (d) How many scales do you find in a bud ? 

 {c) Describe their position with reference to each 



other. 

 (d) What purpose is served by this arrangement ? 



17. (a) Compare the outermost bud-scales as to thick- 



ness, shape, length, and colors, with the inner 

 ones. 

 (d) Account for these differences by reference to 

 their position and purpose. 



18. {a) Describe the parts developing from within the 



scales. 

 {d) Describe their covering. 

 (c) What is the purpose of this wool-like covering? 



