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The striae of Retzius are incremental growth lines or bands seen in tooth enamel. They represent the incremental pattern of enamel, the successive apposition of different layers of enamel during crown formation. Striae of Retzius visible on the lower incisors of a 26-year-old patient.
Illustration of carpentry (charpente) in the French Encyclopédie showing hewing, mortising, pit sawing on trestles. Tools include dividers, axes, chisel and mallet, beam cart, pit saw, trestles, and bisaigue. The men talking may be holding a story pole and rule (or walking cane).
Fine or microscopic spiral sculpture (also called "striae") is present in many species. The shells sometimes feature an umbilicus . Wentletrap shells have a roundish or oval aperture , but its inner lip is often reduced to strip of callus.
A giant chisel used in framing and traditional building construction. slip A shaped stone used for sharpening non-flat blades such as gouges. snib A wooden toggle used to hold the work on a table. softwood Wood from a gymnosperm tree, i.e. trees in the divisions Pinophyta and Ginkgophyta.
Carpentry is a skilled trade and a craft in which the primary work performed is the cutting, shaping and installation of building materials during the construction of buildings, ships, timber bridges, concrete formwork, etc. Carpenters traditionally worked with natural wood and did rougher work such as framing, but today many other materials ...
Also used to describe log building), corner post construction, post-and-plank, Ständerbohlenbau (German) and skiftesverk (Swedish). This traditional building method is believed to be the predecessor to half-timber construction widely known by its German name fachwerkbau which has wall infill of wattle and daub , brick, or stone.
Carpentry is one of the traditional trades but is not always clearly distinguished from the work of the joiner and cabinetmaker, in general, a carpenter historically did the heavier, rougher work of framing a building including installing the sheathing and sub-flooring and installing pre-made doors and windows. Joiners did the finer work of ...
Woodworking is the skill of making items from wood, and includes cabinetry, furniture making, wood carving, joinery, carpentry, and woodturning. History [ edit ]