Usually they are of a different colour, and may be black, brown, yellowish, or also less frequently rose-coloured, rusty-red, orange-reddish, saffron, or of various intermediate shades.
The Prussian offer expressed a doubt that his long absence from university teaching might have made him rusty, so he accepted the post at Heidelberg, whence Fries had just gone to Jena (October 1816).
There is also an intermediate stage in which the glass has a rusty red colour by reflected light, and a purpleblue colour by transmitted light.
All the above enumerated lambs are naturally a rusty black or brown, and with very few exceptions are dyed a jet black.
Infection of the leaves of the young wheat plants follows on the scattering of the aecidiospores: a sorus of the rusty uredospores is produced, and the life-cycle is complete.
The general colour of the upper parts is yellowish grey, with or without a rusty tinge, which is, however, always noticeable on the head; while the underparts are lighter.
The ancient cannon, which look seaward, wear a very menacing expression; but I doubt if there is any unkindness in their rusty old hearts.
Its groups include the Dakota formation, characterized by a very peculiar rusty sandstone, and the Benton, both of which are rather widely accessible and heavy; the Niobrara; the Pierre shales, which apparently underlie about three-quarters of the state in a deep and heavy bed; and, in the extreme west, the Laramie.
The coat is shaggy and oily, and is preferred with as little white as possible, but the general black coloration may have rusty shades.
The eastern phase is generally rusty red above, with the inner sides of the limbs white; while the predominant hue in the western form is usually yellowish brown.
By the operation of meteoric agencies, iron pyrites readily pass into limonite often with retention of external form; and the masses of "gozzan" or "gossan" on the outcrop of certain mineral-veins consist of rusty iron ore formed in this way, and associated with cellular quartz.
Owing to the presence of oily globules of an orange-yellow or rusty-red colour in their hyphae and spores they are termed Rust-Fungi.
It is nearly allied to the grivet, but distinguished (as indicated by its name) by the presence of a rusty patch at the root of the tail, and by the black (instead of grey) chin, hands and feet.