. An encyclopædia of gardening; comprising the theory and practice of horticulture, floriculture, arboriculture, and landscape-gardening, including all the latest improvements; a general history of gardening in all countries; and a statistical view of its present state, with suggestions for its future progress, in the British Isles. Gardening. 148 SCIENCE OF GARDENING. Paut water ; and if the solution is exposed to the action of the atmosphere, the water is gradually evaporated, and the gum again left in a solid mass. According to the analysis of Gay Lussac and Thenard, it consists of the
. An encyclopædia of gardening; comprising the theory and practice of horticulture, floriculture, arboriculture, and landscape-gardening, including all the latest improvements; a general history of gardening in all countries; and a statistical view of its present state, with suggestions for its future progress, in the British Isles. Gardening. 148 SCIENCE OF GARDENING. Paut water ; and if the solution is exposed to the action of the atmosphere, the water is gradually evaporated, and the gum again left in a solid mass. According to the analysis of Gay Lussac and Thenard, it consists of the following elements, in the following proportions, 1U0 parts being the integer: carbon 42-2o; oxy- gen 5084; hydrogen 6-93; saline and> earthy matter a small quantity; total 100. Gum tragacanth is the produce of the astragalus tragacantha, a thorny shrub that grows in the islands of the Levant. It is less transparent than gum arabic, and not so easily dissolved in water. Cherry-tree gum is obtained from the prunus avium, and other species of the same genus, and in general from all trees with stone- fruit, from which it exudes spontaneously and in great abundance. It differs from gum arabic and tra- gacanth in its concreting in larger masses, and being more easily melted. Mucilage is found chiefly in the roots and leaves of plants, particularly such as are bulbous and succulent; the bulbs of the hyacinth and leaves of the marshmallow. It is found also in flax-seed, and in many of the lichens, and is to be obtained only by maceration in water, from which it is separated by means of sulphuric acid. The uses of gum are considerable. In all its varieties it is capable of being used as an article of food, and is highly nutritive, though not very palatable. It is also employed in the arts, particularly in calico- printing, in which the printer makes choice of it to give consistency to his colors, and to prevent them from spreading. The botanist often uses it to fix his specimens u
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Keywords: ., bookcentury1800, bookpublisherlondonprinte, booksubjectgardening
