A plaster cast of the type is, when dry, saturated with shellac varnish and redried.
By boiling this varnish with dilute nitric acid vapours of acrolein are given off, and the substance gradually becomes a solid non-adhesive mass the same as the ultimate oxidation product of both raw and boiled oil.
If the electrified body is touched against the upper plate whilst at the same time the lower plate is put to earth, the condenser formed of the two plates and the film of air or varnish becomes charged with positive electricity on the one plate and negative on the other.
Extensive use of this property is made in the paint and varnish trades.
Repsolds' more recent form of the spider-line micrometer (since 1 The marks of varnish so applied will he seen in fig.
Small fragments, formerly thrown away or used only for varnish, are now utilized on a large scale in the formation of "ambroid" or "pressed amber."
Then come establishments for making tobacco, gloves, chocolate, artificial manure, cement, varnish, chemicals and pottery.
In varnish manufacture; it is also used for a fuel; a purer product is extensively used in the colour and fine chemical industries.
The cables are wrapped in cotton duck soaked in oxidized oil and varnish, and are sheathed in sheet iron.
The town is flourishing and rapidly increasing, and possesses very extensive wire factories (in connexion with which there are puddling and rolling works), machine works, and manufactories of gloves, baskets, leather, starch, chemicals, varnish, oil and beer.
The " ni-in " (also known as " axe ") is a small scale insect belonging to the genus Coccus, found in Yucatan, Oaxaca, Vera Cruz, Michoacan and other southern states, where it inhabits the spondia trees and produces a greasy substance called " ni-inea," which is much used by the natives as a varnish, especially for domestic utensils, as it resists fire as well as water.
Among the city's manufactures are agricultural implements, iron bridges and other structural iron work, watches and watch-cases, steel, engines, safes, locks, cutlery, hardware, wagons, carriages, paving-bricks, furniture, dental and surgical chairs, paint and varnish, clay-working machinery and saw-mill machinery.
Incense was constantly used, especially the copalli (copal) well known to us for varnish; little terra-cotta censers are among the commonest of Mexican antiquities.
The varnish is then removed, a different design stopped out, and another metal deposited.
At the present time excellent reproductions of Rowland's speculum gratings are on the market (Thorp, Ives, Wallace), prepared, after a suggestion of Sir David Brewster, by coating the original with a varnish, e.g.
And the king of Siam, who had some Englishmen in his service, and, when the ships visited" Sia "(which was" as great a city as London ") or the queen of Patani, they were hospitably received and accorded privileges - the important items of export being, as now, tin, varnish, deer-skins and" precious drugs."Later on, the East India Company's servants, jealous at the employment of Englishmen not in their service, attacked the Siamese,, which led to a massacre of the English at Mergui in 1687, and the factory at Ayuthia was abandoned in 1688.
Among the other important manufactures in 1905 were: chemicals, valued at $3,964,726; slaughtering and meat packing, $2,933,877; varnish, $2,893,305; stamped ware, $2,689,766; enamelled goods, $2,361,350; boots and shoes, $2,382,051; reduction of gold and silver, not from ore, $2,361,350; corsets, $2,081,761; paints, $1,812,463; silverware and silver-smithing, $1,780,906; tobacco, cigars and cigarettes, $1,742,862; hardware, $ 1, 6 16, 755; buttons, $1,281,528, and saddlery hardware, $1,151,789.
It is allied to copal in its nature and appearance, and is much used by varnish-makers.
Shen-si is specially noted for the varnish tree.
Wednesfield (pop. 4883), Heath Town Or Wednesfield Heath (9441) and Willenhall (18, 515) are neighbouring urban districts, with populations employed in the manufacture of locks, keys and small iron goods, in iron and brass foundries, varnish works, &c.
The young trees, he states, furnish the most valuable gum, the older yielding merely a clear glutinous fluid resembling copal varnish.'
Electrostatic voltmeters are also liable to have their indications disturbed by electrification of the glass cover of the instrument; this can be avoided by varnishing the glass with a semi-conducting varnish so as to prevent the location of electrostatic charges on the glass.
It has a considerable iron and metal industry, and manufactures of shoes, varnish, &c.
Other notable branches of manufacturing industry, besides those already named, are flour-mills, jute, hosiery, lace, paper, cement, hats, haberdashery, machinery, tobacco, soap and candle factories, iron and steel works, distilleries, breweries, potteries, vinegar, chocolate, varnish, furniture, clothing and brickworks.
After the oil has been allowed to burn for some time according to the consistence of the varnish desired, the pot is covered over, and the product when cooled forms a viscid tenacious substance which in its most concentrated form may be drawn into threads.
Detroit is probably the largest manufacturer in the country of freight cars, stoves, pharmaceutical preparations, varnish, soda ash and similar alkaline products.
Varnish, sealing wax, as in Michael Ivanovich's list.
The varnish to fix the webs is applied, not on the surface T as is usual, but on a bevel for the purpose,' the position of the webs depending on their tension to keep them in their furrows.
It has even been supposed that amber passed from Sicily to northern Europe in early times - a supposition said to receive some support from the fact that much of the amber dug up in Denmark is red; but it must not be forgotten that reddish amber is found also on the Baltic, though not being fashionable it is used rather for varnish-making than for ornaments.
The alcoves were white, seemingly of stone or plaster; but the archways were covered with blue varnish or blue tiles, with beautiful inscriptions in white and gold.
The fibrous tough roots, softened by soaking in water, and split, are used by the Indians and voyageurs to sew together the birch-bark covering of their canoes; and a resin that exudes from the bark is employed to varnish over the seams. It was introduced to Great Britain at the end of the 17th century and was formerly more extensively planted than at present.
Grahamite and glance-pitch are common, and are exported for use in varnish and paint manufactures.
There is a considerable trade in varnish, and the saddle-trees and other leather goods produced here are in high repute.
After storing several years it is known commercially as " tanked oil," and has a high value in varnish-making.
South-eastern Greece and the Peloponnesus show (in their sequence of pottery fabrics): (i.) An Early Bronze Age culture (black-varnish ware, Urfirnis) similar to that of the Cyclades and Crete but of meaner development, which was dominated in turn by (ii.) its more progressive neighbours of the Cyclades (dull-paint ware, Mattmalerei) and perhaps of Asia (Minyan ware), and ultimately (iii.) of Crete (Mycenaean).
Quicklime mixed with white of egg, hardened Canada balsam, and thick copal or mastic varnish are also useful for cementing broken china, which should be warmed before their application.