Read Carefully. Place your name and address on the first sheet of the test. Use a light grade of paper and write on one side of the sheet only. Do not copy answers from the lesson paper. Use your own words, so that your instructor may know that you understand the subject. Read the lesson paper a number of times before attempting to answer the questions.

1. What properties of "cream of tartar" make i.

suitable for baking powder?

2. Explain how a candle is a gas factory.

3. What conditions must be present for an explosion to take place?

4. What is "cooking soda?" How does it differ from washing soda ?

5. What is the principle of the Davy safety lamp?

6. Describe the manufacture of coal gas.

7. How is water gas made? What objectionable features has it?

8. What is "quick lime" and what are its uses?

9. How is electricity produced in a voltaic cell ?

10. What does the chemical formula H2S04 indicate?

11. How is "conservation" illustrated in the life and decay of a tree?

12. What can you say about the advisability of the housekeeper making experiments?

13. How would you test for a carbonate? How for an acid without using litmus paper?

14. How are tests made by comparison?

15., Are there any questions you would like to ask relating to "A Day's Chemistry" ?

16. Have you any personal experience, original method, or new fact to offer, relating to the subjects taken up in the lesson on the "Chemistry of the Household" that would be of interest to your fellow students?

Note - After completing the test, sign your full name.