On an Improved Plan : in which the Respective Sciences are Arranged Into Complete Systems, and the Arts Digested Into Distinct Treatises : Also the Detached Parts of Knowledge Alphabetically Arranged and Copiously Explained, According to the Best Authorities; : Containing a Digest and Display of the Whole Theory and Practice of the Liberal and Mechanical Arts, Comprising a General Repository of Ancient and Modern Literature, from the Earliest Ages Down to the Present Time ... : The Whole Forming a General Circle of Science, and Comprehensive Library of Universal Knowledge. : Illustrated with One Hundred and Seventy Copper Plates, Descriptive of the Subjects to which They Refer