CHAPTER IX 

 THE HOSE-LEVEL 



THE author has recently used a simple 

 device for drainage leveling with excellent 

 success. This device is shown in Fig. 69. 

 It consists of a piece of garden hose, 

 with a water gauge tube tightly inserted 

 in each end, and the ends held up. 

 Water is carefully introduced into the 

 hose halfway to the top of the tubes. 

 When proper care is exercised to prevent 

 the presence of air bubbles in the water 

 in the hose (and this is easily accom- 

 plished), and when the upper ends of the 

 tubes are open, the two columns of water 

 stand at the same height (or level) no 

 matter how irregularly the hose may 

 lie upon the ground or other surface. 

 "Liquids seek their level." (See Fig. 

 70.) 



213. Accuracy of reading. Far greater 

 accuracy in reading can 

 be obtained with this_ 

 device than with any of 

 the so-called cheaper 

 levels; and so far as he 

 has used it, the author FIG. 69. Hose-level. 



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