8 



Elementary Work in Botany. 



pocket, and finally burst through, tearing either the inside 

 or the outside wall. Examine the pocket carefully. Which 

 would give way: the coat, which is the outside wall of the 



pocket, or the pocket wall fastened 

 to it? If the pocket should break 

 on the inside, and the caulicle 

 continued to grow longer, what 

 would be the result? 



Compare the three embryos. 

 Examine the plumules with your 

 lens. Make as many drawings as 

 the time will permit. Put your 

 undissected seeds back in the cup; 

 pour off the water and press down 

 upon the seeds a wet cloth or sev- 

 eral thicknesses of wet blotting- 

 paper. Prepare at home a piece of 

 apparatus in this way : Find or 

 make a smooth stick about one 

 inch square and half an inch 

 shorter than your glass jar. Cut 

 a piece as broad as your stick, but 

 not half so thick, so that it will 

 just fit when held horizontally in the mouth of the jar. 

 Fasten this with a nail to one end of the square stick, as 

 here shown.* It can now be made to stand up in the center 



Fig. 6. Showing how beans may 

 be pinned to a stick for the purpose 

 of observing their germination in a 

 fruit jar. a. The crosspiece, which 

 must fit the mouth of the jar. b. A 

 lyima bean, c and d. Windsor beans, 

 one with the caulicle pointing down- 

 ward and the other with the caulicle 

 pointing upward. 



*The jar and stick already prepared can be furnished by the publishers. 

 [See Appendix.] 



