A small vial or test tube plugged with cotton makes a very satisfactory watering device for caged insects. A significant drawback, however, is the difficulty in preventing the tube from rolling whenever the cage is moved. Setting the tube in a lump of clay is often suggested, but the clay soon becomes quite soiled.
Iowa Science Teachers Journal
© Copyright 1981 by the Iowa Academy of Science
"A Use for a Throwaway,"
Iowa Science Teachers Journal: Vol. 18
, Article 28.
Available at: https://scholarworks.uni.edu/istj/vol18/iss1/28