Standard Yard
   Working standards of length must, ideally, be directly available for use by the public. This must be the philosophy behind this set of length standards bolted to the brick wall beside the gate to the Greenwich Observatory in England. The Standard Meridian is only a few yards away, and just above it a large, twenty-four hour clock which is set, presumably, to Greenwich Mean Time.
   This standard yard, by Troughton and Simms, is in the collection of the University of Toronto. It date is somewhere between 1837 and 1901, judging from the Crown and 'V.R." initials on one end.
This unmarked yard standard is at the University of Vermont.
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