(1) Conditions favorable and unfavorable to growth.
(2) Their relations to mankind.
(3) Some methods of fighting harmful bacteria and diseases caused by them.
Laboratory Suggestions
Field work.—Presence of bracket fungi and chestnut canker.
Home experiment.—Conditions favorable to growth of mold.
Laboratory demonstration.—Growth of mold, structure, drawing.
Home experiment or laboratory demonstration.—Conditions unfavorable for growth of molds.
Demonstration.—Process of fermentation.
Microscopic demonstration.—Growing yeast cells. Drawing.