Cl i: REN1 M I i ERS 



weight on the tail should be adjusted or the meter be held rigidK 



iserting a plug in the slot against the stem. 



In \\oid taking measurements in \ of less than 



0.5 foot per second, because the accuracy of the m. t> r dirnin- 

 i-he* as zero vcU n\ is i|.).i.ached. 



11.1. .-us than 1 foot per second, the pivot 



point -hoiild ! the same a> at the tune ..t rating sharp and 

 smooth. As the \eU u\ increases, the condition of the point i* 

 less important, because the friction factor decreases. 



12. In tak .MI r.ni.nt- at high velocities, sufficient 

 weight, and a stay-line, should be used to hold the meter in a 

 vertical position. 



13. In very shallow 

 streams the meter should be 



Ml>pended from the lo\\er hole 



on the stem, and the weight 

 should he placed above. 



14. II the cups of the 



meter are bent, they may be x{3> f 



easily put in shape by pressing C 



them \\ith a piece of wood or v 



metal with a round, smooth i 



end. 



15. The telephone re- 

 ceiver is very sensitive to elec- 



trie . um -iits, and can be used 

 to locate any break in the 



First try die telephone T<gUn M<ter Clma , 



and battery together (Fig. 9) 

 in .1 .inn it having a make-and-break point, as at a. This may 

 be done 1>\ u-ini: a knife blade or a screw driver, making con- 

 "ii \\here the wires enter the plug. If there is no click in 

 the telephone, then the L.ittery or the telephone does not make 

 a cin mt. 1 1 there is a click, insert the meter in the line and 

 test for a contact m the meter head { Ki^. Kh iy revolving the 

 meter wheel. If the meter i* all right, put the meter cord in 

 the circuit and test both sides either hy inserting a fine needle 

 that joins both condnetor> or hy making double connection and 

 touching alternate sides of the line, a. (Fig. 11). 



