Some trouble was taken in 1884 to produce a special time scale for this formula. It was quite unnecessary, because the time scale for tonnage (see XVIII.) then in use could have been employed, (XV.) A being modified to R = L{3} ÷ constant (XV.) B and by adjusting the constant this form of the length rule can be adapted to the time scale of _any_ cubic rule. Thus, the divisor 5,000 adapts it to the Y.R.A. time scale for _rating_. The type resulting from the length rule was, of course, a very fast and powerful boat for its L., carrying an enormous sail-spread--somewhat costly to build and race. Our grandfathers raced their yachts under the old tonnage rule, Tonnage R = L × B × H ÷ 96 (XVI.) H. being depth of hull to deck beam, and L. being measured in various ways at different times. After 1854 it was taken on deck from stem-head to sternpost, and certain deductions made for rake. Eventually the Thames Rule, (L - B) × B × 1/2B ÷ 94 or B{2}(L - B) ÷ 188 (XVII.) _The Rating Rules and Proposals_ +-----+-------+------------------------------+---------------------+-------------+ | | No. | Name of rule or proposal | Rule or proposal | Examples | | Date| in +------------------------------+---------------------+------+------+ | | text | Cubic rules | Variable÷constant |Decima|Doreen| +-----+-------+------------------------------+---------------------+------+------+ |1886?| I. |Y.R.A. rule (Dixon Kemp) | LS ÷ 6,000 | 9.98| 9.96| +-----+-------+------------------------------+---------------------+------+------+ |1892 | II. |Ditto modified (Watson) |(2L+2B÷D)S ÷ 17,000 | 10.06| 9.89| +-----+-------+------------------------------+---------------------+------+------+ |1892 | VIII. |New York modified (Dixon Kemp)|L{2} [V¯]S ÷ 6,000 | 8.69| 9.56| +-----+-------+------------------------------+---------------------+------+------+ |1892 | X. |Y.R.A. modified (Dixon Kemp) |(L{2}S)/[3V¯]W÷10,000| 8.80| ? | +-----+-------+------------------------------+---------------------+------+------+ |1892 | VII. {Seawanhaka modified }(L+ [V¯]S){3}÷48,000 | 9.39| 9.75| | | {Y.R.A. Committee's rule } | | | +-----+-------+------------------------------+---------------------+------+------+ |1892 | XIII. |U.Y.F. rule (Godinet) |G(4L-G) [V¯]S ÷ 520 | 8.57| 9.02| +-----+-------+------------------------------+---------------------+------+------+ |1892?| XIX. |Old French rule |G{2}(2L-B) ÷ 176 | 12.58| 13.53| +-----+-------+------------------------------+---------------------+------+------+ |1876?| XVI. |Old English tonnage rule |L B H ÷ 96 | ? | 10.60| +-----+-------+------------------------------+---------------------+------+------+ |1876-| XVII.