 |
The adjustments document
describes this brass yard as a "line and an end measure". A "matrix"
is formed by the brass block at either end of the yard and defines the
end measure. The yard scale is standard at 58.9 degrees Farenheit while
the bottom of the matrix is standard at 66.9 degrees. |
 |
"No. 21" This number does
not appear to have a connection to the other items described in the adjustments
document. |
 |
At either end of the yard are
two brass blocks that form a "matrix". The blocks are tapered out
towards the ends from bottom to top by .03". |