“Gelseminum is stimulant, tonic, and anti-spasmodic. By its relaxing effect it produces gentle diaphoresis, and is said to be narcotic. Its effect in large doses, or doses too frequently repeated, is extreme relaxation, and general prostration of the whole muscular and nervous system. It will suspend and hold in check muscular irritability and nervous excitement with more force and power than any known remedy. It is of a pleasant bitter taste, and performs its wonder-working cures, in all febrile diseases, without exciting either nausea, vomiting, or purging. When enough has been given to produce its specific effect, the eye is dimmed, the vision clouded and double, the head light and dizzy. When these effects follow the administration of this remedy, no more should be given until the patient has entirely recovered from its influence. ‘It maybe used in all species of fevers, nervous and bilious headache, colds, pneumonia, hemorrhages, leucorrhea, chorea, ague-cake, asthma, and many other diseases: but its efficacy has been most admired in all forms and grades of fevers.’ It should always be used with great care and caution. The root is said to possess a resinous principle, which, when extracted by pure alcohol, will produce death in very small doses. But no such effect need be expected from the proper dose of the common tincture. There is danger of carrying it to such an extent as to suspend involuntary muscular action, and when this is the case, death must ensue. ‘It is incompatible with no known substance, and may follow any preceeding treatment with perfect safety.’ The dose is forty drops for an adult, and children in proportion to age and temperament. It is given either with or without quinine. It has been used alone for chronic rheumatism, in doses of forty drops, three times a day, with marked effects. Three or four doses, with a mild cathartic, will remove the redness and swelling attending inflamed sore eyes. Special attention should be directed to the general health and constitution of the patient before giving gelseminum. If the bowels be constipated they should be moved by a gentle aperient, and kept in a relaxed condition. It requires double the quantity to produce the effect on some that it does on others; and should the practitioner ever produce too great a degree of relaxation, he should lose no time in stimulating and toning up his patient.” {371}
The alleged effects of this plant on the human system, taken in connection with its medico-botanical relations, mark it out as being probably one of the most valuable of our indigenous remedial agents, and render it well worthy of the investigation of regular physicians.
ON THE MANUFACTURE OF WRITING INKS. (Concluded from page [316.])
Prussian blue, that has not undergone digestion in acid in the way above pointed out, will require a much larger proportion of oxalic acid, from twice to three times its weight; and even then it will be greatly liable to precipitation after standing; but when treated in the way described, it is not liable to precipitate, but remains a permanent solution.
STEPHENS’ RED INK.—Stephens’ red ink is prepared as follows:—Take a quantity of common soda, potash or carbonate of ammonia, to which is to be added, at intervals, twice its weight of crude argol in powder.
When the effervescence, arising from this combination, has ceased, pour off the solution, or filter it from the insoluble matter; to this, add by measure half the quantity of oxalate of alumina, or oxalo-phosphate of alumina, prepared by adding to precipitated alumina or phosphate of alumina, in a damp state, as much oxalic acid as will dissolve. Into this mixture, put, when cold, as much cochineal, first bruised or powdered, as will give it a fine red color, varying the quantity according to the shade of color required; and after letting it stand for the space of forty eight hours, strain it off for use.
PROFESSOR RUNGE’S WRITING FLUID.—One of the least expensive formulas for the manufacture of a writing ink, is that given by Professor Runge, who says: “I have for some time {372} endeavored to find a black fluid possessing the properties of forming no deposit, of adhering strongly to the paper, of being unaffected by acids, and lastly, what is of great importance, not acted upon by steel pens.
“After many experiments, I have succeeded in obtaining a composition of the kind required, very simple in its preparation, containing nothing but logwood, chromate of potash, and water, and free from vinegar, gum, copperas, blue vitriol, and even nutgalls. The low price of this writing fluid is also in its favor. It is prepared by simply adding one part of chromate of potash to 1000 parts of decoction of logwood, made by boiling twenty-two pounds of logwood in a sufficient quantity of water to give fourteen gallons of decoction; to this decoction, when cold, the chromic salt is gradually added, and the mixture well stirred. The addition of gum is injurious. In the preparation of this ink, it must be remembered that the yellow chromate and not the bi-carbonate of potash is employed, and great care is required to ensure due adjustment of the relative proportions of the ingredients used. The best way is to make a decoction of logwood, and gradually add to it, well stirring the mixture, as much solution of chromate as will give the shade required.
“It appears astonishing what a small quantity of the chrome salt is required to convert a large quantity of decoction of logwood into a black writing fluid; the fact is however certain, and care must be taken not to allow the proportion of chrome salt to exceed half a part for each 500 parts of decoction of logwood, as a larger quantity exercises a prejudicial effect in destroying the coloring matter of the liquid, whilst in the proportion above mentioned, a deep blue black writing ink is formed, which, unlike the ink made with tannogallate of iron, is perfectly fluid, forming no deposit. This writing fluid possesses another advantage; the paper which has been written upon with it may be washed with a sponge, or be left twenty-four hours under water, without the writing being effaced. Weak acids do not destroy the writing, nor do they even change the {373} shade, whilst that made with gallnuts is effaced, and the ink prepared with logwood and copperas is turned red.