The materials required are iron borings, sal-ammoniac and sulphur; these are mixed together, moistened with water, and rammed into the socket, which is previously half filled with yarn, well caulked.
The materials mixed with the iron borings cause them to rust into a solid mass, and in doing so a slight expansion takes place.
Suitable proportions of materials to form a rust joint are 90 parts by weight of iron borings well mixed with 2 parts of flowers of sulphur, and I part of powdered sal-ammoniac. Another joint, less rigid but sound and durable, is made with yarn and white and red lead.
He constructed one form of his coherer of a glass tube a few inches long filled with iron borings or brass filings, having contact plates or pins at the end.
Borings and soundings taken at Funafuti in 1897 indicate almost beyond doubt that the whole of this Polynesian region is an area of comparatively recent subsidence.
See Geographical Journal, passim; and Atoll of Funafuti: Borings into a Coral Reef (Report of Coral Reef Committee of Royal Society, London, 1904).
Borings show that the thickness of this group varies from 35 o ft.
The Funafuti borings (1897) show almost beyond doubt that Polynesia is an area of comparatively recent subsidence.
When the location of the deposit has been determined approximately, further search is made by trenches or pits or borings through the surface soil.
Strata by means of borings, either for the purpose of determining the Coal resources of Great Britain.
The borings of marine shellfish visible in these columns between II and 19 ft.
The company which took up the mining was unsuccessful, and boring ceased in 1901, but the work was resumed by the Consolidated Kent Collieries Corporation, and an extension of borings revealed in 1905 the probability of a successful development of the mining industry in Kent.
They are usually fine-textured limestones and shales, lying horizontal; the moderate or small relief that they were given by mature preglacial erosion is now buried under the drift, but is known by numerous borings for oil, gas and water.
Wherever it comes to the surface it comes up from beneath younger rocks which are, as a rule, less metamorphic. By means of deep borings it is known at many points where it does not appear at the surface, antI is believed to be universal beneath younger systems.
Portion of Oahu for several hundred feet has been discovered by artesian borings through coral-rock.
Except in Limburg, where, in the neighbourhood of Maastricht, the upper layers of the chalk are exposed and followed by Oligocene and Miocene beds, the whole of Holland is covered by recent deposits of considerable thickness, beneath which deep borings have revealed the existence of Pliocene beds similar to the " Crags " of East Anglia.
Numerous other borings to depths of 100 to 200 ft.
The town draws a supply of natural gas, used for lighting, heat and motive power, from deep artesian borings first made in 1891.
Competent engineers and specialists have declared that borings in the Bakhtiari hills, west of Shushter, would give excellent results, but the difficult hilly country and the total absence of roads, as well as the antipathy of the inhabitants of the district, would make the transport and establishment of the necessary plant a most difficult matter.
The fact that this valley is a post-Glacial lake-basin was attested by the borings and excavations made for the foundations of the dam.
Its site had been determined by about 190 borings, probings and shafts, which, following upon the indications afforded by the rocks above ground, proved that the rock bed crossing the valley was higher at this point than elsewhere.
From the surface, was found the rock bar of the post-Glacial lake; at points farther up the valley, borings nearly too ft.
Any uncondensed bromine vapour is absorbed by moist iron borings, and the resulting iron bromide is used for the manufacture of potassium bromide.
Among these is the argument from the numerous borings made in the alluvium of the Nile valley to a depth of 60 ft., where down to the lowest level fragments of burnt brick and pottery were always found, showing that people advanced enough in the arts to bake brick and pottery have inhabited the valley during the long period required for the Nile inundations to deposit 60 ft.