The sick are a source of danger and one means of dissemination, and, since the illness may be so slight as to pass unrecognized, an obviously insidious one.
In the following year he announced that silica was the oxide of a hitherto unrecognized element, which he named silicium, considering it to be a metal.
In 1841 Mosander, having in 1839 discovered a new element lanthanum in the mineral cerite, isolated this element and also a hitherto unrecognized substance, didymia, from crude yttria, and two years later he announced the determination of two fresh constituents of the same earth, naming them erbia and terbia.
In the subject of diseases of the skin much has been done, in the minuter observation of their forms, in the description of forms previously unrecognized, and in respect of bacterial and other causation and of treatment.
The scheme of 1892 reduced the number of hours assigned to Latin from 77 to 62, and laid special stress on the German essay; but the modern training given by the Realgymnasium was still unrecognized as an avenue to a university education.
Deprived them by ordinance of the right of instruction, and obliged all applicants for licences as teachers to make oath that they did not belong to any community unrecognized by the laws.
It is obvious that such a right was a novelty hitherto unrecognized by any system of law.
This curious figure served to identify a similar but much finer piece of unknown origin, which had lain for many years unrecognized in the British Museum.
They were Fraticelli, Beghards, Lollards or other confraternities unrecognized by the church and in steady opposition to her government.
But his lonely life and unrecognized labours leave him apart from the main movement, until his works were discovered again in the 19th century.
Chiefship is quite unrecognized, except on the Keriwina Islands.
We have, however, yet to notice the enlargement of the sphereof ethics due to its close connexion with theology; for while this added religious force and sanction to ordinary moral obligations, it equally tended to impart a moral aspect to religious, belief and worship. " Duty to God " - as distinct from duty to man - had not been altogether unrecognized by pagan moralists; but the rather dubious relations of even the more orthodox philosophy to the established polytheism had generally prevented them from laying much stress upon it.
At the same time the leading part played by the province of Holland in the history of the republic has not been unrecognized, for the country ruled over by the sovereigns of the house of Orange is always popularly, and often officially, known as Holland.