THE GAS RANGE 



199 



OVEN TEMPERATURES FOR BAKING VARIOUS FOODS 



Searing Roasts . . . 500 F 



Biscuit 450 



Pies 400 



Bread 35oF 



Layer Cake .... 300 

 Custard 250 



Experiment. How to produce a luminous and a non-luminous gas flame. 



Materials: Bunsen burner. Chalk dust. 



Method and Observations: Close the air holes near the base of the burner. 



Light the gas. Describe the flame. Open the air holes. What 



change in flame occurs? When you have a clear non-luminous flame, 



blow a little chalk 



dust into the air 



holes. Effect on the 



flame ? Place a piece 



of heavy white paper 



down over the lumi- 



nous flame for an 



instant. What is the 



product ? 

 Conclusion: From these 



results try to give a 



reason why the gas 



flame is luminous 



when no air is mixed 



with it. What is 



the part that car- 



bon plays in a lumi- 



nous flame? What 



type of burner is 



best for cooking de- 



vices? 



Top burner of the gas range. 



The gas range. 



In many homes 



where gas is avail- 



able, the gas range 



has supplanted the coal or wood stove for cooking. It 



is not only quicker, cleaner, and more convenient, but. 



especially if natural gas is available, it is much cheaper, 



