Has glass any attraction for water?
Yes; therefore, the water collects on the glass in drops.
What other examples of adhesion may be given?
Paint adheres to wood, dust to furniture, and tin and mercury to the back of a looking-glass.
Will you name a few of the most adhesive substances?
Glue, mortar, paste, and putty.
Of what use is glue?
Glue fastens pieces of wood together.
Of what use is mortar?
Mortar fastens together the bricks and stones used in the construction of houses and other buildings.