1886.

1887.

1888.

1889.

1890.

1891.

1892.

1893.

1894.

1895.

1896.

TABLE No. 8.-Yield of the Sudbury Watershed in Gallons per Day per Square Mile1 from 1875 to 1907- Continued.

720,000 1,009,000 1,632,000 880,000 1,366,000

1,461,000 2,589,000 1,053,000 2,782,000 1,254,000 3,018,000 1,870,000 434,000 693,000 1,034,000 1,084,000
4,801,000 2,829,000 1,950,000 1,196,000 1,529,000 3,486,000 943,000 1,542,000 991,000 541,000 2,676,000
2,059,000 2,868,000 3,238,000 1,338,000 3,643,000 4,453,000 1,955,000 3,245,000 2,238,000 2,410,000 3,835,000
1,947,000 2,620,000 2,645,000 1,410,000 1,875,000 2,397,000

583,000

June,

203,000

413,000 421,000 653,000 568,000

413,000

July,

116,000

115,000 117,000

634,000

107,000

149,000

673,000 369,000 2,758,000 1,941,000 1,215,000
1,020,000 643,000 3,043,000 2,241,000 996,000 544,000 485,000 796,000
1,087,000 1,154,000 1,697,000 1,383,000 1,285,000 1,315,000 781,000 1,037,000
223,000 234,000 953,000 944,000 747,000
239,000 327,000 237,000

305,000

697,000

319,000

871,000 2,125,000 1,640,000 2,515,000 1,494,000
1,259,000 2,883,000 840,000 636,000 360,000
428,000 440,000 419,000 174,000 399,000
214,000 158,000 161,000 231,000
280,000 181,000 209,000 229,000 57,000
229,000 108,000 150,000 89,000 388,000
210,000 126,000 222,000 374,000 1,379,000 592,000
836,000 2,777,000

MONTH.

1 The area of the Sudbury watershed used in making up these records included water surfaces amounting to 1.9 per cent. of the whole area from 1875 to 1878, inclusive, and subsequently increased by the construction of storage reservoirs to 3.0 per cent. in 1879, 3.4 per cent. in 1885, 3.9 per cent. in 1894 and 6.5 per cent. in 1898. The watershed also contains extensive areas of swampy land, which, though covered with water at times, are not included in the above percentages of water surfaces.

TABLE NO. 8.-Yield of the Sudbury Watershed in Gallons per Day per Square Mile1 from 1875 to 1907--Concluded.

MONTH.

1897.

1898.

1899.

1900.

1901.

1902.

1903. 1904.

1905.

1906.

1907.

Mean for
33 Years,
1875-1907.

306,000

182,000 369,000 94,000 65,000
94,000 1,160,000 115,000 186,000
909,000 1,986,000 304,000 663,000 474,000 444,000 363,000 289,000
1,584,000 1,799,000 220,000 1,096,000 2,695,000 1,779,000 582,000 269,000
991,000 1,450,000 973,000 1,082,000 1,342,000 1,140,000 1,190,000 931,000
564,000 777,000 93,000 194,000 445,000 271,000 388,000 228,000

424,000
305,000
412,000 506,000

845,000 1,638,000 2,288,000 794,000 437,000 1,763,000 1,736,000 477,000 1,410,000 1,128,000 1,351,000
1,067,000 3,022,000 1,381,000 3,800,000 300,000 1,674,000 2,279,000 882,000 330,000 1,041,000 624,000
2,565,000 2,604,000 4,205,000 3,654,000 2,755,000 4,199,000 3,454,000 2,999,000 2,497,000 2,409,000 1,658,000
1,515,000 1,829,000 2,521,000 1,350,000 4,204,000 1,885,000 2,261,000 3,294,000 1,643,000 1,949,000 1,607,000 2,081,000
915,000 1,246,000 511,000 1,312,000 2,954,000 743,000 351,000 1,745,000 297,000 1,059,000 888,000 1,106,000
962,000 530,000 66,000 316,000 753,000 303,000 1,987,000 419,000 467,000 707,000 761,000 533,000
658,000 231,000 19,000-18,000
66,000 445,000 62,000 177,000 398,000 9,000
591,000 1,107,000 -35,000-34,000
135,000 307,000
178,000 130,000
492,000

1,224,000

1,753,000

2,914,000

1 The area of the Sudbury watershed used in making up these records included water surfaces amounting to 1.9 per cent. of the whole area from 1875 to 1878,
inclusive, and subsequently increased by the construction of storage reservoirs to 3.0 per cent. in 1879, 3.4 per cent. in 1885, 3.9 per cent. in 1894 and 6.5 per cent.
in 1898. The watershed also contains extensive areas of swampy land, which, though covered with water at times, are not included in the above percentages of
water surfaces.