"Sheepshanks" Comparator, 1845-55, for Yard Standards, with scales tank mounted on roller carriage, standing on 3" thick slate base plate, 4' 0" x 5' 6 1/2". The whole apparatus 3' 4" high Sheepshanks' Comparator for Yard Standards 1845-1855
"Local Standard" micrometer yard bed of hard brass for testing local yard "End" measures, 1934, in fitted case. (Standard Dept. Regulations A.3) "Local Standard" micrometer yard bed of hard brass for testing local yard "End" measures, in fitted case 1934
"Geneva" Comparator, 1902, for Yard and Metre Standards, with wood-tank (metal-lined) for scales 4' 8 1/2" x 1' 3" x 10" deep, mounted on cast-iron trolley with screw traversing gear. The whole on a 4" thick slate base, about 5' x 2' 6" "Geneva" Comparator