div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: Oughtred Society Slide Rule Home Page14 age Journal of the Oughtred Society Q 50 pic ETT Figure 8 Model 101C — Circular Slide Rule 41 in ES Yellow Has Case and Manual 2 src=https:reader034vdocumentinreader034viewer20220503155f777282a441044a8158cb65html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 2button div class=ts-image amp-img class=ts-thumb alt=Page 2: Oughtred Society Slide Rule Home Page14 age Journal of the Oughtred Society Q 50 pic ETT Figure 8 Model 101C — Circular Slide Rule 41 in ES Yellow Has Case and Manual 2 src=https:reader034vdocumentinreader034viewer20220503155f777282a441044a8158cb65html5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 3button div class=ts-image amp-img class=ts-thumb alt=Page 3: Oughtred Society Slide Rule Home Page14 age Journal of the Oughtred Society Q 50 pic ETT Figure 8 Model 101C — Circular Slide Rule 41 in ES Yellow Has Case and Manual 2 src=https:reader034vdocumentinreader034viewer20220503155f777282a441044a8158cb65html5thumbnails3jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 4button div class=ts-image amp-img class=ts-thumb alt=Page 4: Oughtred Society Slide Rule Home Page14 age Journal of the Oughtred Society Q 50 pic ETT Figure 8 Model 101C — Circular Slide Rule 41 in ES Yellow Has Case and Manual 2 src=https:reader034vdocumentinreader034viewer20220503155f777282a441044a8158cb65html5thumbnails4jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 5button div class=ts-image amp-img class=ts-thumb alt=Page 5: Oughtred Society Slide Rule Home Page14 age Journal of the Oughtred Society Q 50 pic ETT Figure 8 Model 101C — Circular Slide Rule 41 in ES Yellow Has Case and Manual 2 src=https:reader034vdocumentinreader034viewer20220503155f777282a441044a8158cb65html5thumbnails5jpg width=142 height=106 layout=responsive amp-img divdiv