(Study pages 89-111) Baking Powder

Perform experiments suggested on pages 90 and 91.

Reference: Baking Powders. Bulletin No. 119, Maine Agricultural Experiment Station. (Loaned for 2c.)

Lighting

(1) See Experiment page 93.

(2) Insert the small end of a clay pipe stem in the inner part of a candle flame and touch a lighted match to the other and so prove that the candle is a "gas factory."

3) With a piece of wire gauze make the experiments illustrated on page 95. (4) Visit the local gas plant if there is one - or the electric light station - obtaining permission first from the office.

Electric Batteries

(I) Detach one of the batteries that furnish the current for the electric bell, attach a wire to each pole and place the other ends on the tongue and note that the electric current gives a slight "taste" - i. e., stimulates some of the nerves of taste.

(2) Get some one to explain the action in an electric bell or send 2c. stamp to the School for circular giving descriptive diagram, diagrams for bell wiring, etc.

Plants

Examine with a microscope the "breathing pores" on the under surface of leaves.