Many powders are found in medical uses, some of which have retained the name of their inventor, such as the compound powder of rhubarb, "Gregory powder," named after a Scottish doctor, James Gregory (1758-1822).
In the 6th century Alexander of Tralles used colchicum for gout, iron for anaemia, and rhubarb in liver weakness and dysentery.
In the south, in the Julianehaab district, even flowering plants, such as aster, nemophilia and mignonette, are cultivated, and broccoli, spinach, sorrel, chervil, parsley, rhubarb, turnips, lettuce, radishes grow well.
Stored tobacco is liable to be attacked and ruined by the " cigarette beetle," a cosmopolitan insect of very varied tastes, feeding not only on dried tobacco of all kinds, including snuff, but also on rhubarb, cayenne pepper, tumeric, ginger, figs and herbarium specimens.
It is found in the form of its acid potassium salt in many plants, especially in wood-sorrel (Oxalis acetosella) and in varieties of Rumex; as ammonium salt in guano; as calcium salt in rhubarb root, in various lichens and in plant cells; as sodium salt in species of Salicornia and as free acid in varieties of Boletus.
Upon the exposed mountain slopes a species of rhubarb (Rheum Ribes) is noticeable.
Its crop of potatoes in 1909 was 52,560,000 bushels and that of Maine, the next largest, 29,250,000 bushels; and the state is a large producer of onions, turnips, cabbages, cauliflower, sweet Indian corn, cucumbers, rhubarb, parsnips, carrots, green peas and green beans.
The bitterness is imparted by such substances as bitter orange rind, gentian, rhubarb, quassia, cascarilla, angostura, quinine and cinchona.
Tibet produces a large number of medicinal plants much prized by the medical profession in China and Mongolia, among others the Cordyceps sinensis, the Coptis teeta, Wall., and Pickorhiza kuwoa, Royle, &c. Rhubarb is also found in great quantities in eastern Tibet and Amdo; it is largely exported for European use, but does not appear to be used medicinally in the country.
Forcing is the accelerating, by special treatment, of the growth of certain plants, which are required to be had in leaf, in flower or in fruit before their natural season, - as, for instance, the leaves of mint at Eastertide or the leafstalks of sea-kale and rhubarb at Christmas, the flowers of summer in the depth of winter, or some of the choicest fruits perfected so much before their normal period as to complete, with the retarded crops of winter, the circle of the seasons.
Rhubarb and sea-kale among esculents both need to be forced in darkness to keep them crisp and tender, and mushrooms also are always grown in dark structures.
Remarkable rhubarb-like plants with huge lobed leaves, often 6 ft.
Force asparagus, sea-kale and rhubarb, in hotbeds, in pits, in the mushroom-house or in the open garden by the use of covers surrounded with warm litter; for cucumbers a top heat of 70 0; for vines in leaf and flower a temperature ranging from 65° to 70°.
Continue the forcing of asparagus, rhubarb and sea-kale.
Stake up peas; blanch sea-kale and rhubarb in the open air by covering with straw or leaves.
Force asparagus, rhubarb and sea-kale, in the mushroomhouse, in pits, or in the open border under boxes or cases surrounded and covered by well-fermented stable dung and leaves.
Continue the forcing of asparagus, rhubarb and sea-kale, in pits and in the mushroom-house.
- Asparagus, rhubarb, spinach, &c., should be uncovered, and the beds hoed or dug lightly.
If asparagus or rhubarb is wanted for winter use, it should be taken up and stowed away in pit, frame, shed or cellar for a month or two.
In the highlands of Kabul edible rhubarb is an important local luxury.
The bleached rhubarb, which has a very delicate flavour, is altered by covering the young leaves, as they sprout from the soil, with loose stones or an empty jar.
Bleached and unbleached rhubarb are both largely consumed, both raw and cooked.
The commonest are senna in the form of compound liquorice powder, sulphur in the form of lozenges, cascara sagrada, either in tablets or in the form of liquid or dry extract, rhubarb, colocynth and especially aloes.