Cyclopædia of useful arts & manufactures, ed. by C. Tomlinson. 9 divs, المجلد 41852 |
من داخل الكتاب
النتائج 1-5 من 22
الصفحة 665
... potash , and sugar , ignited when required , by crushing a small glass vessel , containing sulphuric acid . The salt and the sugar , moulded into a homogeneous mass , are placed in a perforated cylinder , contained within a second ...
... potash , and sugar , ignited when required , by crushing a small glass vessel , containing sulphuric acid . The salt and the sugar , moulded into a homogeneous mass , are placed in a perforated cylinder , contained within a second ...
الصفحة 682
... potash - lyc . dirt . The tow is also delivered without the usual. Fig . 953 . Heckling by machinery is generally practised in large mills . The flax being divided into lengths of about 10 or 12 inches , a certain quantity is taken ...
... potash - lyc . dirt . The tow is also delivered without the usual. Fig . 953 . Heckling by machinery is generally practised in large mills . The flax being divided into lengths of about 10 or 12 inches , a certain quantity is taken ...
الصفحة 686
... potash or lime may be used instead of soda . This completely dissolved the resinous and oily substances of the plant , producing a soapy kind of liquid , which removed at the same time all ex- traneous matter , leaving it , unlike flax ...
... potash or lime may be used instead of soda . This completely dissolved the resinous and oily substances of the plant , producing a soapy kind of liquid , which removed at the same time all ex- traneous matter , leaving it , unlike flax ...
الصفحة 688
... potash in the flint of the chalk of Limhamn , in Sweden . In 1,000 parts flint he detected 1.17 potash , 1.13 lime , with traces of oxide of iron and alumina , and a small quantity of carbonaceous matter , which left no residue on being ...
... potash in the flint of the chalk of Limhamn , in Sweden . In 1,000 parts flint he detected 1.17 potash , 1.13 lime , with traces of oxide of iron and alumina , and a small quantity of carbonaceous matter , which left no residue on being ...
الصفحة 700
... potash , or soap , will make this colour pass into purple ; a little alum gives it a fine crimson- red , and an acid will make it pass into yellow , of which the shade is deeper according to the quantity employed . Carmine is better in ...
... potash , or soap , will make this colour pass into purple ; a little alum gives it a fine crimson- red , and an acid will make it pass into yellow , of which the shade is deeper according to the quantity employed . Carmine is better in ...
طبعات أخرى - عرض جميع المقتطفات
عبارات ومصطلحات مألوفة
acid action allowed appear applied arranged attached becomes called carbonate carried close coal collection colour common complete considerable consists containing copper covered cylinder direction divided edge effect employed engine equal exhibited feet files filter fire fixed flax force frame fuel furnace give glass gold hand heat importance inches increase iron kind lead length less light lime lower machine manufacture mass material matter means metal method mixed motion nature nearly obtained operation oxide passing pieces pipe placed plate polishing portion prepared present pressure produced proportion pure quantity removed retorts round salt sand screw separated shown side specimens square steel stone substance sufficient sulphur supply surface temperature thick turned usually variety various weight whole wire wood
مقاطع مشهورة
الصفحة 731 - ... one over the fire itself, and a long, fixed one over the flue. The sand-baths supply every gradation of heat, from dull redness, if required, down to a temperature of 100°...
الصفحة 807 - Two measurements of length are made from the poll to the tip of the horn, one on the inside and the other on the outside of the horn.
الصفحة 706 - The vessel being thus hermetically sealed, and all access of air prevented, it may be sent into any climate, without fear of putrefaction, and the most delicate food of one country be thus eaten in its original perfection in a distant region, many months, or even years, after its preparation.
الصفحة 815 - ... the dextrine of a violet, approaching to red, without any mixture of blue. It is unnecessary to say, that during the decomposition, the liquid must be kept constantly in motion. The operation lasts about an hour and a quarter, that is to say, a quarter of an hour for the formation of the paste, one for its dissolution, and the other three-quarters for rendering it soluble. I much prefer this method of forming the paste...
الصفحة 708 - ... the cases were landed with the other stores, and left upon the beach. " Eight years afterwards, in August, 1833, they were found by Sir John Ross in the same condition as they were left ; and he wrote to Mr Gamble at the end of that year, saying that ' the provisions were still in a perfect state of preservation, although annually exposed to a temperature of 92°(?) below and 80° above zero.
الصفحة 667 - In order to fill up the intervals between the joists that support the floor, short pieces of common laths, whose length is equal to the width of these intervals, should be laid in the contrary direction to the joists, and close together in a row, so as to touch one another; their ends...
الصفحة 731 - The interval between them, which gradually increased from the lower to the upper part, was filled with pulverized glass-blowers' pots, to which water enough had been added to moisten the powder, which was pressed down by sticks, so as to make the whole a compact mass. A round grate was then dropped into the furnace, of such...
الصفحة 787 - Yet so comparatively small were the gatherings of the precious metal, that in reckoning the average produce of all parts of the New and Old World for a series of years previous to 1847, it did not amount to the annual value of five millions sterling.
الصفحة 723 - Wood used Initial temperature of water in boiler Temperature of water in tank . Barometer 29-7 mean Extremes of external thermometer . . 32° — 56° Extremes of internal thermometer . . 58° — 68° Dew point ....... 48° mean Area of damper open 168 in.
الصفحة 661 - ... which projected the water only in spurts, and with continual interruption. Such machines, on each movement of the lever, experience a stoppage, during which no water is thrown out ; and because the pipe is fixed, it cannot convey water to remote places, though it may reach a fire at no great distance, where there are doors and windows to afford it a passage. At the same time the workmen are exposed to danger from the falling of the houses on fire, and must remove from them to a greater distance.