This section is from the book "Shop Projects Based On Community Problems", by Myron G. Burton. Also available from Amazon: Shop Projects Based on Community Problems.
Paragraph 81. Saw filing is a very technical piece of work. It should not be attempted without considerable study; it is not to be expected that elementary students should file their own saws in the shop. This work should be done by the teacher or an expert saw filer. An inexperienced student is likely to damage a saw almost beyond repair in his early attempts at filing. Note: If it is thought advisable to attempt sawfiling in the school there should be a saw or two put aside for this purpose and used for practice work. No student should be permitted to attempt the work on any of the regular shop saws until he has acquired sufficient skill to be able to do it without danger of damage to the saw. It is not the purpose of this discussion to give detailed illustrations and instructions on the technical subject of saw dressing. A careful study of some of the references given in this text will offer valuable assistance along that line.
 
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