Page:Willich, A. F. M. - The Domestic Encyclopædia (Vol. 4, 1802).djvu/367

W I N W I N [33s ^'Tr^ i^'^- The advantages of millsj 011 this construction, are stated by his Lordship to be the following : 1. That the broad part of the sail is at the end of the lever, or branch, and thus an equal resist- ance may be overcome with less length of branches, or arms. These being consequently shortened, a considerable weight of timber will be rendered unnecessary, and a material saving of expence be ob- tained, in the height, prime-cost, and subsequent repairs of the mill. 2. The sails, constra6ted on the plan above represented, may be set to draw in a manner similar to the stai/saiis of a ship , and, as they are swelled more tlian those, in England, Lord S. remarks, that they will render it unnecessary to bring the mill so frequently to the windj a pra6tice which, in ma- chines of the usual construction, is always attended with considerable trouble. In November, 1783, a patent was .granted to Mr. Benjamin Wise- man, for his invention of sails, with horizontal levers, designed t(j communicate motion to windmills. His patv-nt is now expired ; but, as a description of such machmery would be unintelhgible without the aid of engravings, the reader is re- ferred to the 45i vol. of the " Re. per lory-