(c.)

Water.—Siphon, pump. Oil, cream.

Solids.—Hinges, tires and axles. The grindstone. Screws and screw drivers.

Powders.—Black-lead.

Pastes.—Pottery.

Things porous.—Blotting-paper, towels, wicks, earth.

Things that melt.—Lead, iron.

Water.—Salt lakes. Distillation of water. Clouds and rain.

Things that dissolve,—Crystals, hard water, varnishes.

Air.—The popgun, the fire-engine. Winds. A sailing-ship.

Forms of Strength.—The roof. Railway bridges. Cranes.

Things that bend.—Clock-spring, Chains.

Machines.—The loom. Threshing-machine, boiling iron rails. Coining.

Movements.—Flying.

Musical Toys.—Tin whistle. Sounds from stretched cord.