Dingey, Peter Spear. [from old catalog] · New York, J. Wiley & sons · leaf 137
a manner not too compli-mentary. One-quarter of an inch (i^-inch in the diameter) oughtto be enough for boring out say a 20 x 48 cylinder, butif the same amount only was allowed on a \o yi J2cylinder, the bore in all probability would not clean outto proper size; y^ or ^ would not be too much… … Fig. 153,
Patternmaking
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