Mathematics. Collected works. 5922 .6=—¥**E.5124.6 Simson, R. 1687-1768. Roberti Simson... Opera... (Continued) geometrarum ab oblivione vindicare, . . . captum hodiernorum adumbrare constitutum est.-De loga- rithmis liber.-De ... et rationum, fragmentum.- Appendix pauca continens . .. ad illust... aecipue veterum geometrarum analysin. There is a portrait in 5922.6.