172 



ENGINEERING FOR LAND DRAINAGE. 









Table 



7 — Continued. 









rtj <u 



0.00 



0. TO 



0. 20 



0.30 



40 



0.50 



0.60 



0.70 



0.80 



0.90 



120 



444 . 44 



444 81 



44 5 . T 8 



445 55 



445 92 



446.20 



446.67 



447 - 04 



447 41 



447-78 



121 



us.is 



448.52 



448.89 



449 26 



449 63 



450.00 



450.37 



450 74 



451 11 



451 48 



1 22 



451. S5 



452.22 



452,59 



452 96 



453 ?>^ 



453.70 



454 07 



454-44 



454.81 



455-iS 



123 



4SS.S'? 



455-92 



456.29 



456.67 



457.04 



457.41 



457.78 



458 15 



458.52 



458.89 



124 



459. 26 



4'=:9-63 



460.00 



460 37 



460 74 



461 .11 



461 .48 



461 85 



462.22 



462 59 



125 



462.06 



465-33 



463.70 



464 07 



464.44 



464.81 



465.18 



465.55 



465. 9H 



466 30 



326 



466 67 



467-04 



467.41 



467.78 



468 15 



468.52 



468 . 89 



469. 26 



469 ti 



470.00 



127 



470.37 



470.74 



471.11 



47 1 . 48 



471. 85 



472.22 



472.59 



472.96 



473.33 



473 70 



128 



474-07 



474.44 



474. 8 J 



475.18 



475-56 



475.93 



476.30 



476.67 



477-04 



477.41 



120 



477.78 



478.1s 



478.52 



478.89 



479-26 



470 63 



480.00 



480.37 



480.74 



481.11 



130 



48 1 . 4S 



4^1 -SS 



482»2.> 



48 2 59 



482 96 



483.33 



483.70 



484 07 



484.44 



484. Si 



J ^I 



485 I S 



485.55 485.02 



4S6.29 



4S6.67 



487.04 



487.41 



487 78 



488.15 



488.52 



I ^2 



488 . Sq 



489.261480.6^ 



400.00 



490.37 



490 74 



401.11 



40 r 48 



491.85 



492,22 



I 1? 



492 50 



492 96 



493-3^ 



493 70 



494-07 



494 . 44 



404-81 



405 19 



495-56 



495-93 



lU 



496.30 



406 67 



497 • 04 



497.41 



497 78 



498 . 1 5 



49S.52 



49S 89 



499.26 



499.63 



13=; 



500.00 



500.37 



500.74 



501 . 1 1 



SOI 48 



501 .85 



502 . 22 



502.59 



502.96 



S03 33 



136 



50 H 70 



504.07 



504.44 



504.81 



505 18 



505.56 



505.93 



506.30 



506.67 



S07.04 



T 57 



507. 4x 



507.78 



508. 15 



S08.52 



508 So 



509.26 



509-63 



510.00 



510.37 



Sio 74 



1^8 



5tl.li 



511. 48 



511. 85 



512 22 



512.59 



512. 96 



513.3^ 



513.70 



514-07 



5 14 -44 



X30 



S14.S1 



515. iS 



515.55 



515.92 



516.29 



516.67 



5 X 7 - 04 



517-41 



517-78 



518 IS 



140 



?i8.S2 



518.80 



519-26 



519-63 



520.00 



520.37 



520.74 



521. II 



521.48 



521 85 



To find the number of cubic yards from Table 7, turn 

 to the left-hand column and find the corresponding area 

 number. Opposite this will be found the number of 

 cubic yards in a length of 100 feet. If the area has a 

 decimal part pass the eye to the right and take the 

 number of yards in the column under the decimal cor- 

 responding to the one required. If the number of 

 yards for a part of a station only is required take such 

 a part of the tabular number given as the required 

 length is of 100 feet. 



Examples: The mean area for a 100-foot section is 

 46. How many cubic yards of excavation ? Find 46 

 in the left-hand column, and opposite is 170.37, the 

 number of cubic yards. 



Suppose the mean area of a loo-foot length is 60."/^ 

 find 60 in the left-hand column- Pass the eye to the 

 right and in the column headed .70 take 224.81, the 

 number of cubic yards in the station. As the several 



