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Circa 1803, according to William Pattee's History of Old Braintree and Quincy (1878) Josiah Bemis, George Stearns, and Michael Wild developed a splitting method similar in concept to the plug and feather method. This technique for splitting stone (referred to by modern researchers as the "Flat Wedge Method") entailed cutting slots in a shallow ...
The Fencepost limestone is a relatively thin, resistant, and recognizable bed of stone that forms the middle range of bluffs in the Smoky Hills region of north-central Kansas, ranging from the Nebraska border near Mahaska, Kansas, about 200 miles southwest to within a few miles of Dodge City, Kansas, [1] where it is seen in the buildings of the ...
For this task they may select a point chisel, which is a long, hefty piece of steel with a point at one end and a broad striking surface at the other. A pitching tool may also be used at this early stage; which is a wedge-shaped chisel with a broad, flat edge. The pitching tool is useful for splitting the stone and removing large, unwanted chunks.
Stone was cut using plugs and feathers, where a series of short, small diameter (typically 30 mm) holes are drilled in a line where a cut is to be made. One plug and two feathers were inserted into each hole and each plug is hit in turn with a sledgehammer until the stone yields to the extreme tensile stresses produced.
Feathers and wedges,also known as wedges and shims or plugs and wedges. A three-piece metal tool set for splitting rock / stone. Date: 27 August 2010, 22:15 (UTC) Source: Feathers_and_wedges_2.JPG; Author: Feathers_and_wedges_2.JPG: Anna Frodesiak; derivative work: Snubcube (talk)
When a flake is detached from its core in a Hertzian fashion, the flake propagates in a conchoidal manner from the point of impact or pressure, usually producing a partial Hertzian cone. The cone of force often leaves a distinctive bulb of applied force on the flake and a corresponding flake scar on the core. A bending initiation results when a ...
Lifting the stone a small distance from the ground before hoisting is the best way to test a lewis. Any sign of looseness or damage should be corrected by adjusting the lewis hole or packing the lewis with metal shims. To bed a stone using a lewis, the stone is placed on dunnage laid flat with enough clearance for a mortar bed to be placed ...
The holes are typically 1 ⁄ 4" to 3 ⁄ 4" in diameter and extend through a raised portion centered in the stone. They usually are bored all the way through but some have been found with holes that extend only part of the way through. Many are made from banded slate or other colored hard stone.
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