the River Severn at Worcester. 



259 



would produce, yet its effect was even then sufficiently obvious. 

 It nearly doubled the sodic chloride, and thus showed that 

 although the river obtains much of this salt in the previous part 

 of its course, yet in this respect the little river Salwarp is its 

 most important tributary. 



To each analysis I have appended the height of the river at 

 Diglis lock on the days on which the various waters were taken ; 

 and for this and for other information I am indebted to the 

 kindness of E. Leader Williams, Esq., C.E. to the Severn Com- 

 missioners. Diglis lock is about half a mile below Worcester 

 Bridge ; and the daily height of the river is read off upon its 

 upper sill. At a height of 9 feet 5 inches the river is considered 

 to be at low water, in winter or summer; and 12 feet is taken 

 as the maximum winter height, except in times of flood. 



Severn Water of 1866. 

 Table of Constituents calculated in 1000 parts of the Water. 





Water from immediately above the 

 waterworks. 



Water from 

 Bailey's Ferry. 



April 12,1866. 



July 23, 1866. 



October 30, 1866. 



'■ 



II. Mean 



T. 



II. 



Mean. 



*• 



II. 



Mean 



Dissolved matter : — 

 Potassa 



0063 

 0540 

 



0672 

 0164 

 •0050 

 0607 



•0059 -0061 

 •0575 0557 



i trace 



•0660 0666 



0169 -0166 

 •0030 -0040 

 •0597 -0602 



0^:50 -0351 

 •0137 -0135 



trace 



•0055 

 0741 



0694 



•0209 



•0842 



•0399 

 0025 



•0231 



0051 

 0760 



•0679 

 0207 

 •0020 

 0846 

 ■0419 

 •0029 



•0080 

 •0266 



•3390 



•0053 -0075 



■0074 

 •0444 



•0722 



0184 

 •0035 

 •0416 

 •0422 

 •0081 



*0757 



•0121 

 •0212 



•0074 

 0444 

 trace 

 0722 

 01 ?5 

 •0030 

 0418 

 •0418 

 •0082 

 trace 



0757 



•0130 

 0241 



Soda 



Ammonia 



Lime 



•0750 

 trace 

 •06S6 

 •020S 

 •0020 

 •0844 

 •0409 

 •0027 

 trace 



undeter- 

 mined. 



•0080 

 •0248 



•0445 



•0722 



0187 

 •0025 

 •0420 

 0415 



•0084 



0140 



•0270 



Alumina &c 



Chlorine 



Sulphuric anhydride . 



Nitric „ 

 Phosphoric „ 



Carhonic ,, 



Silicic „ 

 Loss on ignition 



0353 

 •0133 



0S08 



•0105 

 •0368 



•0919 0913 



■0100 -0102 

 •0338 -0353 



Ecsidue obtained by! 

 direct evaporation. J 



•3127 



•3107-3117 



•3533 



•3461 ,-3100 



•3018 



3059 



0162 

 0013 



Suspended matter : — 



•0744 

 0054 



0744 



0054 



1 









trace 

 trac2 



0162 

 0013 





Organic [loss on 

 ignition] 



Spec. grav. of the water 



1000-281 1000-366 



1000-408 





Height of river-level 1 

 at Diglis lock ... J 



13 feet 6 in. 



9 feet 6 in. 



10 feet 9 in. 



* This determination was made immediately after the water was received. 



