Newman, The Bacteria. G. P. Putnam's Sons.
Sedgwick, Principles of Sanitary Science and Public Health. The Macmillan Company.
XII. THE RELATIONS OF PLANTS TO ANIMALS
Problems.—To determine the general biological relations existing between plants and animals.
(a) As shown in a balanced aquarium.
(b) As shown in hay infusion.
Suggestions for Laboratory Work
Demonstration of life in a "balanced" and "unbalanced" aquarium.—Determination of factors causing balance.
Demonstration of hay infusion.—Examination to show forms of animal and plant life.