Column 3 contains the areas of the rings comprised between these circles, which are obtained by taking the differences of the successive areas in column 2.
Column 4 contains the areas reduced to square feet, of that part of each ring corresponding to a single aperture in the wheel, including also the area occupied by the thickness of the corresponding part of one bucket.
Column 5. Corrections for the thickness of the buckets; — these are deduced from measurements taken on a full sized plan of the buckets.
Column 6. True areas of the partial rings, being the differences of the corresponding areas in columns 4 and 5.
Column 7. Mean heights of the partial rings; — these are also taken from a full sized drawing of the wheel.
Column 8. Volumes of the partial rings, or the products of the corresponding numbers in columns 6 and 7.
Column 9. Volumes between the radius R, and the successive values of the radius R′. These are obtained by adding together the volumes of the partial rings, up to the corresponding radius; — they are the successive values of AH.
Column 10. The ordinates; — these are successive values of
Table III.
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