A Tennessee correspondent, after informing us that we are indebted to an article on this subject by Hoe & Co., in the second nnmber of our present volume, for many subscribers in his locality, proceeds to give the following practical information: " As well as the number of teeth being proportioned to the hardness of the timber to be sawed, their number should also be proportioned to the power used. Each tooth of a saw can only cut advantageously a certain distancc forward in passing through thc log, which distance depends on the hardness of the wood; but if a saw has a great many teeth, and is driven by a weak power, each tooth will not cut so far forward as it should do, and there is a loss of power. If the power is great, and the number of teeth few, then each tooth will have to cut too far forward."
This article was originally published with the title "Saw Teeth" in Scientific American 13, 10, 73 (November 1857)
doi:10.1038/scientificamerican11141857-73a