234 
THE PLANT WORLD. 
results of these experiments are due to the fact that the mycelia 
obtained by the methods of Bernard and of Jumelle are not the 
endophytes that really influence tuberization, but accessory forms. 
Still, Jumelle is certain that a species of Fusarium does have 
some influence and it is his intention to continue his researches 
in the hope of obtaining some positive results. 
C. S. G. 
OUTLINE OF A COURSE IN PLANT CULTURE* 
By Asa S. Kinney, M.S., 
Mt. Holyoke College. 
Section I. Early stages of growth of the plant. 
A. The seed. 
1. Structure. 
2. Absorption of moisture. 
3. Testing vitality. 
4. Moisture necessary for germination. 
5. Air (oxygen) necessary for germination. 
6. Heat necessary for germination. 
7. Soaking in water before planting. 
8. Why cover when planted. 
9. Use of cotyledons. 
10. Best soil for germination of seeds. 
11. Subsequent care after planting. 
12. Causes of failure to germinate. 
13. Cracking seed coat before planting. 
14. Time required for germination. 
15. Depth of planting. 
B. The plantlet. 
1. Development of caulicle. 
2. Formation of primary and secondary roots. 
3. Root hairs (rhizoids). 
4. Development of plumule (hypocotyl, epicotyl). 
* Given at Mt. Holyoke College, and requires two hours per week lecture, 
four hours in the laboratory for the spring semester. 
