APPENDIX 
227 
VIII. Large versus Small Seeds as Crop Producers 
Materials. One or two papers of some turnip-shaped variety of 
radish seed. 
Directions. Prepare the ground carefully, sort the seeds into two 
lots according to size, plant large seeds in one row and small ones 
in another. The rows should be at least one foot apart and the 
seeds one and one half inches apart in the row. Keep well culti- 
vated and, when large enough, use for luncheon, observing whether 
the large or the small seeds give the better results. 
IX. Potato Scab 
Materials. A dozen scabby potatoes, a small gunny sack, a ten- 
quart pail containing about two gallons of water and one ounce 
of formalin. 
Directions. Put half the potatoes in the sack, mix the formalin 
and water, set the sack of potatoes in the formalin-water mixture, 
and let it stand one and one half hours. 
Grow the treated and untreated potatoes side by side in the 
school garden. Do not plant where potatoes have been raised the 
past year, as the scab often remains in the ground over winter. 
X. Study of Growth of Molds, Mildews, and Blights 
Materials. Cup, bread, potato or lemon. 
Directioiis. Saturate a piece of bread with water and keep it 
under a cup in a warm place for a few days. Note the white, 
fluffy fibers (mycelium) at the beginning ; later from these arise 
other fibers which bear, tiny, black bodies. Sometimes the ends 
appear green. These fibers act in much the same way as do those 
which form the powdery mildew on the pear and grape leaves. 
The tufts at the end of the delicate fibers contain spores, which 
correspond to the seeds of other plants. Mold on the potato or 
lemon can be observed in a like manner. 
