Saladini, H., 78 Sanders, W., 76 Sault, R., 82 Scarborough, Charles, 16, 54, 58, 60 Schooten, Van, 1 Schreshensuchs, O., 83 Scratch method, 23 Shakespeare, 52 Shelley, G., 76 Shipley, A. E., 1 Shuttleworth, 59 Slide rule, 9, 46-49, 50, 60, 88, 93 Smethwyck, 58 Smith, J., 50 Snellius, W., 79 Solids, regular, 18 Speidell, John, 38, 55 Spherical triangles, 53, 54, 93 Stokes, R., 35, 36, 58 Sudell, 59 Sun dials, 5, 9, 50, 51, 52, 60, 92 Tannery, P., 71 Todhunter, 60 Torporley, 58 Triangles, spherical, 53, 54, 93 _Trigonometria_, 21, 36, 55, 75 Trigonometric functions, symbols for, 36, 37, 55, 56 _Trigonometrie_, 21, 35, 39 Trisection of angles, 28 Twysden, 59, 68, 69, 73 Varignon, 77 Vieta, 1, 2, 25, 32, 33, 35, 39-41, 45, 63, 67, 70, 71 Vlack, 65 Von Braunmühl, 39 Wadham College, 5, 53 Wallis, John, 1, 19, 27, 33, 45, 57-59, 63, 64, 66-74, 79-81, 86 Walmesley, D. C., 79 Ward, Bishop, 13 Ward, John, 76 Ward, Seth, 55, 58, 60, 68, 73, 74, 81 Watch-making, 18, 50 Weber, W. E., 48 Weddle, 56 Wells, E., 76, 82 Wharton, 60 Whitlock, B., 8, 9 Wilson, J., 77, 82 Wing, V., 73, 75 Wingate, E., 32, 47, 73 Wolf, Christian, 79 Wood, A., 60, 61 Wood, R., 18, 59 Wren, Christopher, 5, 58, 59, 76 Wright, E., 6, 27, 38, 54 Wright, S., 54 Transcriber’s Notes A handful of typos, mostly misplaced punctuation, were silently corrected. HTML and UTF text versions make heavy use of mathematical symbols: particularly superscripts, subscripts, and combining characters. Some viewers may require user assistance to find fonts containing these characters. The text versions miss much of the formatting, especially in mathematical formulas: --Several arithmetic examples must be viewed in a monospaced font (which recognizes combining characters) to be legible. --Formulas under the horizontal line of a square root symbol are parenthesized. --Subscripts are preceded by “_”. --Superscripts are preceded by “^”. --Italics, used primarily in formulas and bibliographical entries, are not indicated in the text. --Italics in the index are delimited by “_”. --Underlines are not indicated (in particular, in the fractional part of a decimal number in Oughtred's notation). --The idiosyncratic “greater than” and “less than” symbols are indicated as {symbol} in the ASCII version. --Overdots, underdots, and slashmarks around digits (in the long division example) are not indicated in the ASCII version. --Greek letters are spelled out within {curly brackets} in the ASCII version. End of the Project Gutenberg EBook of William Oughtred, by Florian Cajori