The Technologist, Volume 1Kent & Company, 1861 |
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Termos e frases comuns
abundant acid Algeria animal antimony appearance Assam banks bark beche de mer become boiling borate borax botanical called cent Ceylon China coast collected commerce contain copal Coprolites cotton cultivated districts dried employed exhibited exported extensive extracted favourable fecula feet fibre fish fishery flowers fruit galls ground grows hippopotamus imported inches India indigo insect island juice kind known large quantities leather leaves madder manna manufacture mixed munjeet murexide Museum musk native nitrate nitrate of soda obtained odour paper pearl pearl oysters picul plant pods potato pound powder produced pulp purposes resin river root salt seeds shells silk Society soda sold species specimens sponge starch substance sugar supply Tamarix articulata tannin tanning tree tubers Vanilla variety vegetable wood yellow yield young oysters Zanzibar
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Página 342 - Unlike cochineal, the new dye discovered at Kingston is a native Canadian product, and capable of being produced in temperate countries. Having been but recently observed, a sufficient quantity has not yet been obtained for a complete series of experiments as to its nature and uses ; but the habits of the insect, as well as the properties of the dye, seem to indicate that it may become of practical importance. In colour it closely resembles ordinary cochineal, having rather more the scarlet hue of...
Página 374 - Since this work was printed off, I have seen a substance excellently adapted to the purpose of wiping from paper the marks of a black-lead pencil. It must, therefore, be of singular use to those who practise drawing. It is sold by Mr. Nairne, mathematical instrument-maker, opposite the Royal Exchange. He sells a cubical piece, of about half an inch, for three shillings ; and he says it will last several years.
Página 115 - Count Lippe having put himself in communication with the Austrian Government an Imperial manufactory for Indian corn paper, (maishalm papier, as the inventor calls it,) is now in course of construction at Pesth, the capital of the greatest Indian corn growing country in Europe. Another manufactory is already in full operation in Switzerland, and preparations are being made on the coast of the Mediterranean for the production and exportation on a large scale of the pulp of this new material.
Página 240 - They are from 200 to 300 feet deep, of small calibre, and sustained by scantling. The temperature of the oil, when first raised to the top, is 89°. Men do not go down, but an earthen pot is lowered in and drawn up over a beam across the mouth, by two men running off with the rope.
Página 114 - Wessenfeld, and several experiments give the following results : "1. It is not only possible to produce every variety of paper from the blades of Indian corn, but the product is equal and in some respects even superior to the article manufactured from rags. " 2. The paper requires but very little size to 'render it fit for writing purposes, as the pulp naturally contains a large proportion of that necessary ingredient, which can at the same time be easily eliminated if desirable. "3. The bleaching...
Página 187 - ... more in length, and from a quarter to half an inch in diameter. This organ occurs very low down amidst the sheathing bases of the leaves ; and from having to lengthen to two or three feet, and containing large vessels, forms a very fit subject for ascertaining the early appearances of the vascular tissue. To examine the development of vessels, it is necessary to...
Página 252 - The sap then immediately begins to flow from the upper end, and continues so doing for some months : it is, however, necessary that a thin slice should be shaved off from that end every morning, so as to expose a fresh surface. A good tree will give ninety gallons, and all this must have been contained in the vessels of the apparently dry trunk.
Página 376 - The height of the central tree was 100 feet. It has been estimated, after an accurate survey, that there are 43,240 such noble trees within a length of 30 miles, and breadth of 8 miles of forest near Ferozepoor, in the district of Chardwar, in Assam. Lieutenant Veitch has since discovered that the Ficus elastica is equally abundant in the district of Naudwar.
Página 15 - Sunderbun districts. The extent of country best suited for its growth , and over which it is found most plentifully as above indicated, may therefore be taken as within an area stretching east and west about 200 miles, and north and south about 100 miles, and comprehending by a rough estimate about 9,000 square miles within an irregular triangular space.
Página 275 - ... which, though of far shorter duration, has greatly increased intensity and penetrating power in hazy weather. The amount of divergence depends in a large degree upon the bulk of the source of light, and cannot be made less than a certain amount, with a flame of a given size. If the flame of an Argand lamp...