224 



Journal of Agricultur.al Research 



Vol. X, No. s 



Table IV. — Relation between evaporation froin square and circular tanks of the same 

 surface area and depth. All tanks 3 feet deep, set in ground 2.75 feet 



Week endiag — 



Evapora- 

 tion from 

 tank 4. 



Evapora- 

 tion from 

 tank 3. 



Evapora- 

 tion from 



tank 3 

 expressed 



as a 

 percent- 

 age of 

 that from, 

 tank 4. 



Evapora- 

 tion from 

 tank 2. 



Evapora- 

 tion from 

 tank 15. 



Evapora- 

 tion from 

 tank IS 

 expressed 



as a 

 percent- 

 age of 

 that from 

 tank 2. 



Nov. 22 



29 



Dec. 6 



Feb. 



Mar. 



Apr. 



May- 



June 



July 



Aug. 



Sept. 



Oct. 



Nov. 



1915- 



13 a 



28. 

 6. 



1916. 



20. 

 27. 



3- 

 10. 



24. 



15- 

 22. 

 29. 



5- 

 12 . 

 19. 

 26. 



3- 

 10. 



17- 



24- 



31- 



7- 

 14- 

 21 . 

 28. 



4- 

 II . 

 18. 



25- 

 2 . 



9- 

 16. 



23- 



3°- 



6. 



13- 



Total & 



Percentage 



Inches. 



o. 71 



.91 



•30 



•52 



•77 



.89 



I. 22 



.76 



.91 



•52 



•97 



I. 17 



I. 28 



1-34 

 I. 81 



1. 22 



2-45 



2. 07 

 2. 13 

 1.80 

 2. 71 



2-75 

 2.68 

 1.89 

 2. II 

 2.08 

 1-45 

 1-51 

 I. 96 

 1.79 

 I. 90 

 2.32 

 I. 22 

 I. 41 

 I. 46 



I- 59 

 .76 

 .29 

 .41 



I. 07 

 •47 



59-40 



•99 

 .29 



•45 



1.86 

 .89 

 .92 



I. 26 

 .76 

 •97 

 •59 



I. 12 



I. 20 



^•33 

 1.48 

 I. 91 



1. II 



2. 46 

 2. II 

 2.03 



1. 90 

 3.01 



2. 92 

 2.79 

 1.99 



2.34 

 2. 16 

 I. 61 



1. 72 



2. 04 



1-75 

 2.05 

 2. 17 

 1.29 

 1-39 

 ^•53 

 !• 51 

 .86 



•31 



•43 



1.23 



•50 



62. 07 



Per cen/. 



118 



108 



97 



87 



102 



115 

 103 



103 

 100 

 107 



113 

 116 

 103 

 104 

 no 

 105 

 91 

 100 

 102 



95 

 106 

 III 

 ic6 

 104 



105 

 III 

 104 

 III 

 114 

 104 



98 

 108 



96 

 106 



99 

 105 



95 

 113 

 107 



105 

 "5 

 106 



Per cent. 



104. 5 

 104. 9 



I. 27 

 1.32 



1-53 

 I. 96 



1. 24 



2- 54 



2. 10 

 2. 05 

 1.84 

 2.66 

 2.74 

 2. 69 

 2.06 

 2.30 

 2. 26 



1. 64 



^•75 

 2.15 

 1.88 



2. 17 

 2.44 



I- 57 

 1.48 



1-59 

 .84 

 •32 

 •44 



1-33 

 .60 



52.09 



1-25 

 1.36 



1-52 

 2. 07 



1. 18 



2. 69 



2.34 

 2. 22 



!• 93 

 2.80 

 2.79 

 2. 92 

 2. 05 

 2.28 

 2-35 

 1-55 

 1.80 

 2. 14 

 1.78 

 2. 20 

 2.47 



^•39 

 I. 62 

 I. 70 

 I. 70 

 .90 

 .40 



•57 

 I. 40 



•63 



54. 00 



99 

 103 



99 

 106 



95 

 106 

 III 

 108 

 105 

 105 

 102 

 109 

 100 



99 

 104 



95 

 103 

 100 



95 



lOI 

 lOI 



105 

 103 



"5 

 107 

 107 



125 

 130 



105 



105 



103-7 

 104. 9 



a From Dec. 13, 1915, to Feb. 28, 1916, weekly records were not possible. 

 b Totals and percentages are based upon these totals. 

 « Mean weekly percentages. 



