See:taper bit
A translucent red variety of chalcedony. Also spelled carnelian.
CMD
a. See:photicite
b. A carbonated variety of rhodonite.
a. A point on a tract of land at which two or more surveyed boundary lines
meet; e.g., a township corner. AGI
b. A term that is often incorrectly used to denote the physical station,
or monument, erected to mark the corner. AGI
Square or triangular strips of pinewood fixed vertically down each corner
of a rectangular shaft to secure and stiffen the timber sets.
Nelson
In Wales, bands of clay ironstone.
An orthorhombic mineral, Cu3 (PO4 )(OH)3 ; occurs in
peacock-blue minute crystals and encrustations in Katanga, Zaire, and
Bwana M'Kubwa, Zambia.
See:Bilharz table
Eng. A quartz crystal from Cornwall. Webster 3rd
See:Cornish pump
The weight equal to 21 hundredweight of 112 lb each, or 2,352 lb (1,066.87
kg). Webster 2nd
A single-acting engine in which the power for pumping operations was
transmitted through the action of a cumbersome beam.
Syn:Cornish engine
A geared pair of horizontal cylinders, one fixed in a frame and the other
held by strong springs. The distance apart is adjusted by distance pieces
of shims. Used for grinding. Pryor, 3
A variety of china stone composed of feldspar, mica, and quartz and used
as a bond in the manufacture of pottery. Syn:Cornwall stone
CF:china stone
A hornfels formed by contact metamorphism, and consisting of micas,
quartz, and feldspar. CF:leptynolite
Cornwall, England. AGI
A triclinic mineral, Cu5 (AsO4 )2 (OH)4 ;
dehydrated from cornwallite.
a. A yellow, gelatinous substance, apparently in albumen with 97% water;
found in fissures in diatomite deposit of Luneburger Heide, Hanover,
Germany. It may be an organic matter derived from the diatoms or a fungus.
Tomkeieff
b. A blue, green, hydrous copper silicate; glassy. The colloidal phase of
chrysocolla. English
A monoclinic mineral, Cu5 (AsO4 )2 (OH)4 .H
2 O ; emerald-green; dehydrates to cornubite.
See:Cornish stone