Tortoise shell

Schild-knorpel, m. thyroid cartilage, -kraut, n. skullcap Scutellaria), -krote, /. turtle, tortoise. -laus, /. cochineal insect, -part, n. tortoise shell. 

My secretary came in to announce that the client in the outer office was impatient. Whatever the matter was — a will to prepare, a divorce, a deed — I handled it before going into the adjoining office to face my brother Herb. He looked up from his desk. Behind tortoise-shell glasses he blinked slowly as he always does to hide his incessant curiosity. 

There has always been an abundance of natural fibers and elastomers, but few plastics. Of course, early humans employed a crude plastic art in tanning the protein in animal skins to make leather and in heat-formed tortoise shells. They also used naturally occurring tars as caulking materials and extracted shellac from the excrement of small coccid insects Coccus laced). 

Meanwhile, Peregrine, disguised as a merchant, comes to Sir Politic s house and tells the knight that the police are seeking him because he has plotted to overthrow the Venetian state. When Sir Politic hides in a tortoise shell, Peregrine calls in some other merchants to mock and humiliate the foolish Englishman. 

Wood, tortoise shell, ivory, bone, leather, cloth, and stone can be combined with metal to create decorative enhancements to metal jewelry. 

A typical small trinket box from that period, machined and formed from tortoise-shell sheet, has a chamfered and hinged lid and four machined legs (each about 3 cm in length) all with representations of claw feet. The interior is lined with velveteen and one interesting feature is that the tops of the sides and front were machined so that the lid closed on five pegs (each less than a millimetre in diameter) which were raised only very slightly above the rest of the surface thus a flat closure and ease of opening were assured. 

The sheets were sold for many different purposes, an important one in terms of tonnage and value being the manufacture of spectacle frames. In this application the requirement might a plain colour, a laminate of transparent with translucent or coloured material, or special effects such as tortoise-shell. 

Turde and tortoise shells are composed of dense keratin plates or skutes that are held together with an underlying network of interlocking bones. The carapace is the dorsal or upper part of the exoskeleton. The plaston is the much flatter ventral or underside portion. In some species, the sex of an individual can be determined by the shape of the plastron convex for the female and concave for the male. Figure 6.1 shows a pattern of skutes or plates. The actual size and arrangement of the skutes is unique to each species. 

Vertebrates Reptiles and amphibians Study skins, mounted specimens (taxidermy), whole or partial skeletons, wet-preserved animals or parts Tortoise shell, teeth, skin... 

Further exploration of Mound C in the 1950s revealed 75 burials and accompanying elite grave goods. As Kelly and Larson (2) noted, no single mortuary structure in the Southern culture area has proved as rich in ritualistic paraphernalia as Mound C . The materials from which the objects were made are as varied as are the objects themselves. Shell, pottery, stone, wood, fabric, tortoise shell, and copper are represented in the elite burial goods from Mound C. 

ADIBISI or ADEBEZI — The tortoise, also tortoise shell. 

DAURA, HELLEBORE — Winter Aconite. Others say that it is Gold-leaf DEBESSIS — i.e., Tortoise-shell. 

The Atlantic plate limpet is Tectura testudinalis tes-tudinal means resembling a tortoise shell. The common European limpet is Patella vulgata the patella in human anatomy is the kneecap patelliform means saucershaped, like a kneecap or limpet shell. 

Tannic acid is used as a fixative of dyes and as a chemical intermediate and reagent in the manufacture of inks, rubber, and imitation horns and tortoise shells. Tannic acid is also used to clarify beer and wine in photography as a chemical reagent in analytical laboratories and in pharmaceutical preparations. 

Keratin— ia the oiganic basis of horny tissues, hair, nails, feathers, whslebone, epithelium, tortoise-shell, etc. It is probably not a distinct chemical compound, but a mixture olf several closely relate bodiea... 

The term plastics first included only natural polymers—usually animal proteins (horn and tortoise shell), tree resins, or insect secretions called shellac—that were subsequendy mixed with fillers such as wood flour to yield substances having better molding properties. (A polymer, from the Greek word poly, meaning many, and mer meaning unit, is a molecule with an extremely high molecular weight.)... 

The first man-made polymer was nitrocellulose (NC). The main use of the NC resins was a replacement of the natural and expensive materials, viz., ivory, tortoise shell products, amber, ebony, onyx or alabaster. The use of cellulose acetate (CA) as a thermoplastic began in 1926. Cellulose ethers and esters became commercially available in 1927. Casein crosslinked by formaldehyde gave horn-like materials — Galalith has been used to manufacture shirt buttons, or as imitation of ivory and porcelain [Pontio, 1919]. 

In the manufacture of artificial horn and tortoise shell products ... 

Could the hexagons with circles inside them on the tortoises shell be a leap of about 330 years into the future to our modern structure for benzene We suspect not since benzene would not be discovered for another 200 years However, when we discover that Kekule claimed in the 1860s to have dreamed of benzene s structure formed from three snakes biting tails in a circle, perhaps a subliminal message from another reptile 260 years earlier might not seem quite so strange ... 

Selenite comes from the brine pools on the border of the Jie district of Hedong, where it is pic ed out of the water. Its color and patterning are in every respect li e that characteristic of jade its shape resembles that of tortoise shells. The type which is heavy and very dar is not suitable. The yellow, clear sort is superior. Taiqing danjing yaojue, in Yunji qiqian, 71.14b)... 

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