The extraordinary forms, colors and textures of the true galls have always formed some of the most interesting of biological questions, for not only is there definite co-operation I between a given species of insect and of plant, as shown by the facts that the same insect may induce galls of different kinds on different plants or organs, while different insects induce different galls on the same plante.g.
Under the care of the Greeks the silkworm took kindly to its Western home and flourished, and the silken textures of Byzantium became famous.
From the earliest notices the production of coir, the collection of cowries, and the weaving of excellent textures on these islands have been noted.
The silken textures which at first found their way to Rome were necessarily of enormous cost, and their use by men was deemed a piece of effeminate luxury.
At a later period the conquering Saracens obtained a mastery over the trade, and by them it was spread both east and west - the textures becoming meantime impressed with the patterns and colours peculiar to that people.
Various cotton cloths are imitations of other textures and have modified names which indicate their superficial character, frequently produced by finishing processes.
In the moist state of the thallus these colours are much less apparent, as the textures then become more or less translucent, and the thallus usually prevents the greenish colour of the gonidia (e.g.
Phormium is a cream-coloured fibre with a fine silky gloss, capable of being spun and woven into many of the heavier textures for which flax is used, either alone or in combination with flax.
His knowledge of anatomy, physiology and pathology was necessarily defective, the respect in which the dead body was held by the Greeks precluding him from practising dissection; thus we find him writing of the tissues without distinguishing between the various textures of the body, confusing arteries, veins and nerves, and speaking vaguely of the muscles as " flesh."
The cultivation and manufacture spread northwards to Florence, Milan, Genoa and Venice - all towns which became famous for silken textures in medieval times.