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Areas and Volumes          CONSTRUCTION SCALES          No. 3
Scale Vernier Unit Test Plate Ott's K.&E., No. 4230 Coradi's Compensating  
No. Ratio Linear Area Actual Relative Area Reading Setting Constant Setting Constant Setting Constant Setting Constant
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
    Ins. Ft. Sq. Ins. Sq. Ft. Sq. Ins. Sq. Ft. Sq. Ft. Units ½ mm Units ½ mm Units ½ mm Units ½ mm Units
  1 1:192    1/16 = 1 1=256.0 .01562 4.0 3968.0   992 327.3 17343   26.8 18194 332.0 22617 _ _ _ _ _ _ _ _
  2 1:96    1/8   = 1 1=  64.0 .01562 1.0   992.0   992.0 327.3 17343   26.8 18194 332.0 22617 _ _ _ _ _ _ _ _
  3 1:64    3/16 = 1 1=  28.4444 .01406   .4   440.83 1102.2 297.1 17519   59.6 18174 298.8 22994 _ _ _ _ _ _ _ _
  4 1:48    1/4   = 1 1=  16.0 .0125   .2   248.00 1240 266.0 17868   92.6 18356 265.6 23683 _ _ _ _ _ _ _ _
  5 1:32    3/8   = 1 1=    7.1111 .01406   .1   110.22 1102.2 297.1 17519   59.6 18174 298.8 22994 _ _ _ _ _ _ _ _
  6 1:24    1/2   = 1 1=    4.0 .0125   .05     62.00 1240 266.0 17868   92.6 18356 265.6 23683 _ _ _ _ _ _ _ _
  7 1:19.2    5/8   = 1 1=    2.56 .01562   .04     39.68   992 327.3 17343   26.8 18194 332.0 22617 _ _ _ _ _ _ _ _
  8 1:16    3/4   = 1 1=    1.7778 .01406   .025     27.555 1102.2 297.1 17519   59.6 18174 298.8 22994 _ _ _ _ _ _ _ _
  9 1:12 1         = 1 1=    1.0 .01   .01     15.5 1550 217.6 19221 145.3 19308 212.6 25795 _ _ _ _ _ _ _ _
10 1:8 1 1/2   = 1 1=    0.4444 .01575   .007       6.888   984 329.8 17341   24.2 18198 334.7 22602 _ _ _ _ _ _ _ _
11 1:6 2         = 1 1=    0.25 .01   .0025       3.875 1550 217.6 19221 145.3 19308 212.6 25795 _ _ _ _ _ _ _ _
12 1:4 3         = 1 1=    0.1111 .0108   .0012       1.722 1435 233.3 18674 128.4 18844 229.5 24941 _ _ _ _ _ _ _ _
13 1:2 6         = 1 1=    0.0278 .0108   .0003       0.43 1435 233.3 18674 128.4 18844 229.5 24941 _ _ _ _ _ _ _ _
No. In. Ft. Sq. In. Sq. Ft. Sq. In. Sq. Yds. Sq. Ins. Cu. Yds. Cu. Yds. Units ½ mm Units ½ mm Units ½ mm Units ½ mm Units
  1    1/16 = 1 1=256.0 1=9.481472 .01265 .12 146.9632 1224.7 268.8 17803   89.4 18321 268.9 23601 _ _ _ _ _ _ _ _
  2    1/8   = 1 1=  64.0 1=2.370370 .01265 .03   36.7407 1224.7 268.8 17803   89.4 18321 268.9 23601 _ _ _ _ _ _ _ _
  3    3/16 = 1 1=  28.4444 1=1.053497 .01519 .016   16.32711 1020.5 318.2 17337   35.8 18194 323.2 22705 _ _ _ _ _ _ _ _
  4    1/4   = 1 1=  16.0 1=0.592592 .0135 .008     9.18514 1148.1 285.4 17584   71.5 18216 287.2 23220 _ _ _ _ _ _ _ _
  5    3/8   = 1 1=    7.1111 1=0.263374 .01519 .004     4.08223 1020.5 318.2 17337   35.8 18194 323.2 22705 _ _ _ _ _ _ _ _
  6    1/2   = 1 1=    4.0 1=0.148148 .0135 .002     2.29629 1148.1 285.4 17584   71.5 18216 287.2 23220 _ _ _ _ _ _ _ _
  7    5/8   = 1 1=    2.56 1=0.094815 .01265 .0012     1.46963 1224.7 268.8 17803   89.4 18321 268.9 23601 _ _ _ _ _ _ _ _
  8    3/4   = 1 1=    1.7778 1=0.065844 .01519 .001     1.02052 1020.5 318.2 17337   35.8 18194 323.2 22705 _ _ _ _ _ _ _ _
  9 1         = 1 1=    1.0 1=0.037037 .0135 .0005     0.57407 1148.1 285.4 17584   71.5 18216 287.2 23220 _ _ _ _ _ _ _ _
10 1 1/2   = 1 1=    0.4444 1=0.016461 .01458 .00024     0.25511 1063.0 307.0 17434   48.8 18160 309.9 22789 _ _ _ _ _ _ _ _
11 2         = 1 1=    0.25 1=0.009259 .0108 .0001     0.14351 1435.1 233.3 18674 128.4 18844 229.5 24941 _ _ _ _ _ _ _ _
12 3         = 1 1=    0.1111 1=0.004115 .01458 .00006     0.06378 1063.0 307.0 17434   48.8 18160 309.9 22789 _ _ _ _ _ _ _ _
13 6         = 1 1=    0.0278 1=0.001029 .01458 .000015     0.01595 1063.0 307.0 17434   48.8 18160 309.9 22789 _ _ _ _ _ _ _ _
Note.-- Length of section or thickness of wall is always taken as 1 foot.
Table can be at once used for vols. in cu. ft. as the No. of sq. ft. in any surface is evidently the same as the No. of cu. ft. when the section is taken as 1 ft. in length.

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