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Show In Declination. for use with Sold/r Compass. fall in 24 hours,_ one-half of which reaches the drain. Computed by B. F. WELLES, C.E.. Marshall, Mich. Declinations. ‘_ For Latitude 30°. ' 0" 21" 33" 40" 25 38 «46 32 --5' 47 46 124 1'06 2 07 ~ ‘ 1:. . ' 55 35 ,43 1 01 1 53 44" .50 1 01 ‘ For Lati 2 I I 2ft. 100 ft. 8rd. 32 38 g: 1.0; 1'38 2 00 . 1150 594 ‘1311 665 732 1473 1622 797 853 1762 1889 939 959 1057 1143 2115 . 2333 . 2523 1225 1300 2700 2869 1373 3031 Bottom Widths. : ' ' per , a: aft Fall in Feet , -". - :9 36!! 35 43 1'01 1 54 42 52 ‘1'13 2 10 50 1'02 1 27 2 49 48" 52 1'08 1 36 3 05 57" 1 06 1 21 1 58 4 25 For Latitude 42" 30'. 36" 39 . 44" 50 1'02 1 26 2 30 5 "- 1'02" 1 12 1'00 1 13 1 44 3 22 1 29 2 10 . - ' ' ' ' E .- ‘v . s 1 08 1 19 1 38 1 54 3 40 2 24 5 40 . . . "it. 566D- 1171 1316 1448 1572 1684 1790 1894 2089 2257 2415 2566 2705 2357 2650 2910 3158 3384 3598 3800 4173 4512 4838 5141 5412 Bottom Widths. 4 Fall 111 Feet per ' 8 ft. . 1' . . 2.3} 5 00 .57 1 06 1 21 . . 150 . : .. .. ;- For Latltude 45°. ,, , ,, For Latitude 47° 30" . .. ,, .. 11 02' 44 50 1 .52 00 12 1'01 . 1 13 1 23 1 40 100 ft. 8rd. 2ft. deep. 44!! For Latitude40°. 33" 39 48 1'06 1 51 ' 9599????PPPP owbamcmmmbc¢ mm . 1.4 :Fo 1 58 aft. deep- Eflug . " 52 1'11 zft. deep. 33' 7 9999r E. m999999 ONPGWOGNWIPOG) 3. < OIIFWNO 28 35 ,51 1 31 . A . 54 1'19 2 44 ml l - per For Latitude 32° 30'. 24! I Bottom Widths. 11 ee fl +10" Fall! I t , ,: m99993339999 3 OMDGWGQNmPOOfi 1" P‘ Hour Angle. GhWMC ' ' . "97 'AOREAG‘E 0F OPEN BRAINS. Showbna Number of Acres served by drains having bottom widths from 1 ft. to 1011;, with stdeslopes of 1 to 1, on the supposition of 1 inch rain- ‘ ~ TABLE XII. . " . MEAN. 31131740110173, TABLE x1. 1 28 2 05 100 ft. 8 rd. . K -, ' 3 ft. 2 ft. 8117. deep. deep. deep. 1767 1983 3458 2177 2448 4179 4710 2695 2921 3136 5169 5609 ~ 6014 .030 .038 .04 .05' .045 .053 .060 .06 .07 08 .070 .076 . 2697 2848 3327 3508 6378 . ' fl}, .120 .136 j 6715 $3.; 3628 3854 25331 4489 4760 $23 8578 9110 9623 .150 ‘. 7078 4070 5038' 3807 2181 2369 ' 2538 an9000}% 4 01 2ft. deep. FORMULAS: v = 4 ~- p _ - Q=av, ‘0-14 A = Q x 47.6 = Aéieage < |
