Manual 



of 

 Gurley Hydraulic Engineering In-tmnients 



PART I. 



GURLEY CURRENT METERS 



i l'i;i. I I'MI NTS) 



THEIR CONSTRUCTION, CAHI VM> USE* 

 INTRODUCTION 



I 1( >K III"IV ill. Ill lllirtS Vean \\ . v\ I.. I . <M|||-\ h.l\- !!!.!. I.- 

 I.I, I M,-trr- imd.-r the patents of W. G. Price, the 

 \-iM.mt Engineer of the Corps of Engineers, Unites States 

 \nn\. \\ho in 1885 devised tin- initial pattern. The general 

 ires an* ivtaim-d in the latest models, although somewhat 

 modified as the result of suggestions from many hv<lraulic 

 neers who have had large experience in current meter 

 observation under all conditions of service. 



The many hundreds of Gurley Current Meters in use in all 

 parts of the world, their om-tantl\ increasing sale and th.-ir 

 accuracy and reliability under all conditions, show that they 

 are the standard instruments for the accurate measurement of 

 the velocity of water in streams and open conduit-. 



A current meter fur measuring the velocity of flowing water 

 "in prises two t*--ntial parts: (a) a wheel arranged so that 

 \\li.-n suspended in flowing water the pressure of the water 

 against it causes it to revolve; (b) a device for recording or 

 indieatini: the numher of re\nluti"ii> of this wheel. Hie rela- 

 tion l>etween the velocity of the moving water and the revolutions 

 lie wheel is determined by rating each meter. 



.rely quot.M from -The iwe and care of the current meter, as 



tbt r s ;,..i,,-i.-:il surx.-y.- i.y John a H.-M TmiMi. Am. 

 time 00. page 7<. 



'lucbnrge. ',n.\.-r. f..r milt- bg ^ & L. E. Gurley. 



S2.80 pontpnld. drea a complete trentlne of the method* of o>llc<tln? 

 and nnalyr.lmr stream-flow data. In the preparation of thin Mnnun! 

 honk baa been largely nued and many direct quotation* are made from It. 



