LABORATORY PRACTICE 



VI. Take a Pea which has been well soaked in water, 

 examine it as you did the Bean (II-V), and make sketches. 



Are all the parts noticed in the Bean present in the Pea 

 also? 



Do you notice any differences in the shapes of the parts 

 in the two seeds ? If so, state them concisely. 



VII. Take a Castor Bean 1 and notice : 



1. The general shape and coloration. 



2. The resemblance to a beetle, such as a "June-Beetle " or 



a "Tick." (Could such a resemblance be of use to 

 the Castor Bean?) 



3. The prominence (or caruncle) at one end. 



4. The depression in the caruncle, leading to the micropyle 



(sometimes difficult to find). The caruncle is an 

 outgrowth similar to the strophiole of the Bean (see 

 II, 4, and III, i), only it grows out around the 

 micropyle instead of at the hilum. 



5. The ridge (or streak) on one of the broader sides, the 



rhaphe. 



1 The pupil is warned not to taste the kernels of the Castor Beans, as they 

 are poisonous. 



