Scientific amusements . also be obtained by the evaporation of sea water. Rock salt is got at Salz-burg, and the German saltmines and works producea large quantity. TheCarbonate of Soda ismanufactured from thechloride of sodium, al-though it can be procuredfrom the salsoda plants byburning. The chloride ofMachine for cutting soap in bars. sodium is Converted into sulphate, and then ignited with carbonate of lime andcharcoal. The soluble carbonate is extracted in warmwater, and sold in crystals as soda, or (anhydrous) sodaash. The large quantity of hydrochloric acid producedin the first part of
Scientific amusements . also be obtained by the evaporation of sea water. Rock salt is got at Salz-burg, and the German saltmines and works producea large quantity. TheCarbonate of Soda ismanufactured from thechloride of sodium, al-though it can be procuredfrom the salsoda plants byburning. The chloride ofMachine for cutting soap in bars. sodium is Converted into sulphate, and then ignited with carbonate of lime andcharcoal. The soluble carbonate is extracted in warmwater, and sold in crystals as soda, or (anhydrous) sodaash. The large quantity of hydrochloric acid producedin the first part of the process is used in the process ofmaking chloride of lime. A few years back, soda wasgot from Hungary and various other countries where itexists as a natural efflorescence on the shores of somelakes, also by burning sea-weeds, especially the commonbladder wrack {Fucus vesiculosus), the ashes of which weremelted into masses, and came to market in various statesof purity. The bi-carbonate of soda is obtained by pass-. LITIilUM. 131 ing carbonic acid gas over the carbonate crystals. Sodadoes not attract moisture from the air. It is used in wash-ingi Jn glass manufactories, in dyeing, soap-making, etc. Sulphate of Soda is Glaubers Salt; it is also employedin glass-making. Mixed with sulphuric acid and water,it forms a freezing mixture. Glass, as we have seen, ismade with silicic acid (sand), soda, potassa, oxide of lead,and lime, and is an artificial silicate of soda. Lithium is the lightest of metals, and forms the link
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