_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.
_Home experiment._--Conditions favorable for growth of
yeast.
_Home experiment._--Conditions favorable for growth of yeast
in bread.
_Demonstration and experiment._--Where bacteria may be
found.
_Demonstration._--Methods of growth of bacteria, pure
cultures and colonies shown.
_Demonstration._--Foods preferred by bacteria.
_Demonstration._--Conditions favorable for growth of
bacteria.
_Demonstration._--Conditions unfavorable for growth of
bacteria.
_Demonstration by charts, diagrams, etc._--The relation of
bacteria to disease in a large city.