The surrounding hills (Vinik, Goritsa, Kamenitsa) were, after 1886, fortified by modern earthworks.
In the case of many Oligochaeta where there is no vascular network surrounding the nephridium, this function must be the chief one of those glands, the more elaborate process of excretion taking place in the case of nephridia surrounded by a rich plexus of blood capillaries.
Interpreted dynamically the normal pressure of the surrounding fluid on a tube cannot create any circulation in the tube.
Here A is the iron cover surrounding the furnaces, B is the revolving lid of a furnace, save time and to reduce the loss of the precious metals.
This extraneous influence may, however, be eliminated by surrounding the rod with a coil of wire carrying a current such as will produce in the interior a magnetic field equal and opposite to the vertical component of the earth's field.
With luxuriant woods of oak and beech, and above these again and up to an elevation of 4000 ft., surrounding the hills with a dense dark belt, are the forests of fir which have given the name to the district.
West of the main cloisters are the Deanery, Jerusalem chamber and College Hall, the building surrounding a small court and dating in fabric mainly from the 14th century.
He found a rival in Egypt in the person of Ibn al-Modabbir, the finance minister, who occupied an independent position, and who started the practice of surrounding himself with an army of his own slaves or freedmen; of these Ibn Tulun succeeded in depriving the finance minister, and they formed the nucleus of an army by which he eventually secured his own independence.
The immediate environs are very fertile and produce a great variety of fruits, including many of the temperate zone, but the surrounding country is arid and sterile, producing scanty crops of barley, Indian corn and pease.
The rate of loss of charge is thus largely dependent on the extent to which ions are present in the surrounding air.