AYRES, BENJAMIN |
Holland, 18th Century, MIM NIM SIM |
Octants, wood = DOR, RIJ, AMST (partial); Sextant = TEY; Theodolite = LEY; Sun Compasses = LEY, UTR-Physics Lab., TEY; Azimuth Compass with an octant mounted on top = TEY; Vernier Calipers = UTR; Circumferentor = UTR; Set of Drawing Instruments = Burndy Library, Norwalk, Conn; Equatorial Sundial = UTR. |
invented the vernier calipers; also signed "Aires." |
Amsterdam. |
Rooseboom 1; Daumas 1; Zinner 1; RSW; G.L'E. Turner 7; USNM; Evans 1; de Rijk; Mörzer Bruyns 1 & 2. |
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