Elementary Work in Botany. 9 



of the jar. Divide each side into quarter-inch spaces by 

 drawing pencil lines. Bring this apparatus to school 

 to-morrow. Look up in the dictionary out of school hours 

 all the new words. 



EXERCISE 3. 



Take the stick out of your jar. About three and one- 

 half inches from the lower end fasten on opposite sides by 

 means of pins a scarlet runner and a common bean, so that 

 the micropyles are at the same height and the caulicles are 

 pointing downward. Push the pins squarely through the 

 cotyledons near their apexes. On the other sides fasten two 

 Windsor beans; one with the caulicle pointing directly up, 

 the other with the caulicle pointing down. The micropyles 

 of these four seeds must be on a level. Place the st.ck in 

 the jar, pour in water until it touches the 

 lowest bean, and put on the cap air tight. 

 Keep the jar in a dark place or put a paper 

 bag over it. 



Split a Windsor bean so that the caulicle 

 is cut in halves while the knife passes between Fig. ?. peanut 



embryo, a. One 



the cotyledons. Draw the cut side of one 5W ed n at - 



J tached to the cau- 



half. You have represented a longitudinal, 

 or lengthwise, section of the seed. Could any 



. . the outside. 



other section show all the parts of the embryo 

 and all the important points on the coat ? There could be 

 other longitudinal sections. Accurately described, this one 

 passes through the center parallel to the plane of the coty- 

 ledons. Your section must show the pocket. Put the halves 



