This section is from the book "Cassell's Cyclopaedia Of Mechanics", by Paul N. Hasluck. Also available from Amazon: Cassell's Cyclopaedia Of Mechanics.
The following is a suggestion for fitting up about forty specimens of different wools. The specimens might be arranged as shown by the accompanying illustration. The fronts of all the pieces are in line as at C: but any single piece may be taken out by being pushed back near the top at A when it will assume the position B. The fronts should be polished. If the pieces are thin they may be backed up to the proper thickness (as at C) by commoner material, in which case only half the front should be polished - preferably a diagonal half.

Fitting up a Set of Specimen Woods.
 
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