144 



On the Composition of Waters of Land-Drainafje. 



Table II. — Second Series. Drainag®^ 

 Composition of Drainage-Water from Plots 

 Broadbalk Field, Eothamsted ; Wheat 

 Manures stated in Quantities per Acre ; ConstituentB I 



Per Gallon. 



Unmanured 

 every 

 Year. 



supkri'hosphate akd sulphate of potash, soda, akd 

 Magnesia. 



Without 



Ammo- 



niacal-salts. 



And 200 

 lbs. Ammo- 

 nia-salts 

 (41 lbs. 

 Nitrogen). 



•'And 400 

 lbs. Ammo- 

 nia-salts 

 (82 lbs. 

 Nitrogen). 



I And 600 



\ lbs. Ammo- 



I nia-salts 



(123 lbs. 



Nitrogen). 



And 550 



lbs. Nitrate 

 of Snda 

 (82 lbs. 



Nitrogen). 



Plots 3 6k 4, 



Plots. Plots. 



Plot 7. Plot 8. 



Plot 9. 



Organic matter 



Oxide of iron 



Phosplioric acid 



Lime 



Magnesia 



Potash 



Soda 



Chlorine 



Sulphuric acid 



Nitric acid 



Carbonic acid 



Soluble silica 



Total residue per gallon\ 

 (dried at 260° rahr.)../ 



45 

 153 

 047 

 50 



39 



3^ 



42 

 61 

 14 

 83 

 60 



•99 



•45 



10^24 

 •50 

 •40 

 •88 

 •98 



3^25 

 •21 



6^65 

 •55 



16-65 



20-25 



23-15 



25^10 



31^35 



27^01 



By uniting the acid with the basic constituents into the saline compounds which may be 



An imperial gallon contains 



Chloride of sodium . . 



Carbonate of soda 



Chloride of potassium 



Carbonate of potash .. 



Nitrate of lime . , 



Nitrate of soda . . 



Sulphate of lime 



Carbonate of lime 



Chloride of calcium . . 



Oxide of iron 

 [ Phosphoric acid . . 



Carbonate of magnesia 



Soluble silica 



Organic matter and differ 



m 



25 



21 



04 

 50 



153 



047 



82 



60 



37 



16-65 



89 

 20 



55 

 24 



84 

 43 



375 

 025 

 67 

 51 



52 



20-25 



35 

 66 



41 

 36 



55 



68 



247 

 153 

 54 

 49 



71 



23-15 



1-61 



25-10 



1-91 



-28 

 1-12 



7-53 

 17-04 



-29 



•91 

 •45 



1-82 

 31-35 



•87 

 3-64 



•22 



3-33 



2-77 

 13-25 



-30 



1-09 

 •45 



1-09 

 27-01 



