132 QUESTIONS ON THE 



442. What combination forms Sal Ammoniac? 



443. What are the constituent parts of water and 

 their relative proportions ? 



444. What is the meaning of the word Hydrogen ? 



445. What is the specific gravity of hydrogen gas ? 



446. Will hydrogen gas support life ? 



447. Is hydrogen gas inflammable, and will it support 

 flame? 



448. How is Drummond's Signal Light produced ? 



449. Required the principle and use of the safety 

 lamp. 



450. Required the effect produced by a stream of 

 hydrogen gas made to fall on a piece of spongy pla- 

 tinum. 



451. What kind of gas is that used for the purpose of 

 lighting the streets, shops, &c. ? 



452. What are the constituent parts of oils and fat ? 



453. How may Hydrogen gas be obtained for experi- 

 ment ? 



454. What gas is that which escapes from drains ? 



455. What is the chemical name for that which is com- 

 monly called Laughing gas, and how may it be obtained? 



456. What is Olefiant gas, and how may it be ob- 

 tained ? 



456. What are the peculiar properties of Phosphuretted 

 hydrogen gas, and how may it be made ? 



457. Whence does Chlorine obtain its name ? 



458. Will chlorine support life and flame ? 



459. What will be the result if metal in powder or 

 leaves, as gold leaf, be thrown into chlorine gas ? 



460. What is the use of chlorine gas in the arts, and 

 how may it be obtained ? 



GEOLOGY. 



461. Define Geology. 



462. What depth of the earth's surface has been in- 

 vestigated ? 



463. Is it generally understood by Geologists that the 

 earth was formed at the creation of man, or that it had 

 a prior existence ? 



