The naval architect's and shipbuilder's pocket-book of formulae, rules, and tables and marine engineer's and surveyor's handy book of reference (1884)
Mackrow, Clement · London, C. Lockwood and co. · leaf 45
. 15. To find the area of a hme. (Fig. 77.)Rule.—Find the areas of the two seg-ments formed by the lune; their differencewill be the area required. Thus if A = area oflune, a = area of larger segment, and h - area ofsmaller segment, then A = a—b. To find the area of an ellipae. (Fig. 78.)
