THE HOSE-LEVEL 



173 



READINGS IN INCHES, EIGHTHS, AND SIXTEENTHS TRANSPOSED 

 TO DECIMALS OF A FOOT (HOSE-LEVEL) Continued 



be readily transformed to tenths and hundredths of 

 feet. 



224. To use the apparatus. The way in which the 

 hose-level is used is illustrated in Figs. 73 and 74. It is de- 

 sirable to start the leveling from a stake whose elevation 

 is known or assumed, as is the custom with the ordinary 

 drainage level. The leveling proceeds as follows : 



(a) The attendant, whom we will call the short-rod man, 

 moves with the short rod and one end of the hose-level to 

 stake 2. (In moving, he should be careful to hold a thumb 

 firmly over the end of the tube.) He places the short 



