FARM SANITATION 519 



4. It should be simple in construction so as to be readily 

 understood and not likely to get out of order. 



5. It should be capable of being recleaned and recharged 

 without loss of gas into the room. 



6. There should be a suitable indicator to show how 

 much carbide remains unused. 



7. The carbide should be completely used up, generating 

 the maximum amount of gas. 



Size and Cost of Plant. Generators are made in various 

 sizes, the rating being based upon the number of J^-foot 

 lights that can be supplied with gas. The sizes vary from 

 20-light to 1000-light, but 25, 30, and 35 are the usual sizes. 

 The list prices of these are 120, 135, and 150 dollars, respec- 

 tively. In addition to the cost of the generator, the cost of 

 the piping, fixtures, and installation must be added. For an 

 eight-room house, the total cost will be about as follows : 



Generator $150 



Piping system 40 



Drain and foundation for generator 10 



Fixtures, eight rooms and basement 40 



Barn additional 15 



Total $255 



It is to be understood that this estimate cannot be made 

 very definite owing to the varying number of fixtures required 

 and the cost of labor, freight, etc. 



QUESTIONS 



1. How is acetylene gas made? How is carbide made?, 



2. Discuss the cost and sizes of carbide. 



3. Describe the characteristics of acetylene gas. 



4. Discuss the cost of light from acetylene gas. 



5. What are the essentials of a good generator? 



6. Itemize the cost of an acetylene plant. 



7. What care should be used in installing an acetylene system? 



