Mitra, even as late as the 15th century, retained its simple meaning of cap (see Du Cange, Glossarium, s.v.); to Isidore of Seville it is specifically a woman's cap. Infula, which in late ecclesiastical usage was to be confined to mitre (and its dependent bands) and chasuble, meant originally a piece of cloth, or the sacred fillets used in pagan worship, and later on came to be used of any ecclesiastical vestment, and there is no evidence for its specific application to the liturgical head-dress earlier than the 12th century.
Prudentius describes it in Peristephanon (x., 1066 ff.): the priest of the Mother, clad in a toga worn cinctu Gabino, with golden crown and fillets on his head, takes his place in a trench covered by a.
The Pharaoh's characteristic crown (or crowns) symbolized his royal domains, the sacred uraeus marked his divine ancestry, and he sometimes appeared in the costume of the gods with their fillets adorned with double feathers and horns.
Delphi also contained the "Omphalos," a sacred stone bound with fillets, supposed to mark the centre of the earth.
In some mints the fillets are annealed frequently, the fillets for one-mark pieces at the Berlin mint, for example, being annealed four times in the course of rolling.
The fillets are placed on an endless chain which moves slowly through the furnace, returning underneath.
The result is that so long as the fillets are hot they are kept from contact with the air and blackening of the metal is prevented.
Fillets is measured by the gauge-plate shown in fig.
In the case of very large silver coins only one blank is cut in the width of the fillet, but bronze fillets are made wider so that three penny blanks are cut out at each stroke of the machine.