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Soubeiran's recipe for indelible ink
136
Mechanics, Physics, and Chemistry.
M. E. Soubeiran, from w h o m we take the above description, say that the water made in this w a y isofexcellent quality. The apparatus will serve equally well for the preparation of elfervescing lemonades, or wines, or mineral waters charged with different salts, by replacing the water of the carafe by the appropriate liquid. The apparatus is made of very thick glass, and each piece is submitted, before sale, to the test of a very strong pressure ; for greater security, the two vessels are covered with plaited reeds, which, in case of fracture, prevent the glass from flying. This effect has been proved by actua[ experiment.
Soubeiran's Recipe for Indelible h~k. Translated for the Journal of the Franklin Institute.
Crystallized nitrate of silver, S parts by weight. ,, ,, of copper, q " ,, carbonate of soda, 4 " " aqlla ammonite, 100 " Dissolve and keep in a well-corked bottle. This ink is, of course, to be used without any preparatory liquid. But as the editor of the Journal de Pharmaeie justly remarks, requires a certain quantity of gum ( s a y - - g u m - A r a b i c pulverized, 50 parts,) to allow it to be used as an ink.~Journal de _Pharrnacie et de Chimie, Februarff, 1848.
Test for Organic Matter i7~ Solution i~ ./lbnormal Quantities in Water. Translated for the Journal of the Franklin Institute. M. Alph. Dupasquier proposes the chloride of gold for the purpose of detecting organic matter when present in water in such large proportions as to make it unhealthy to drink, or improper for use in the arts. Into a small glass vessel he introduces from 20 to 25 grammes, (300 or 400 graius,) of the water to be tested, and adds a few drops of a solution of chloride of gold, (carefitlly freed from excess of acid,) so as to give it a slight yellowish tint: the liquid is then boiled. I f the water contains only the quantity of organic matters common to drinkable waters, it retains its color, eveu after long boiling. But if, on the contrary, it contains an abnormal quantity, it first turns brown, then takes a violet, or blush tint, which indicates the decomposition of the gold salt by the organic matter. By prolonging the ebullition, the violet, or bluish tint becomes deeper and deeper, if the proportion of organic matter is considerable, lint a slight brownish, or greenish tint, is sufficient to indicate certainly, that the quantity of organic matter is greater than usual. The salt must be used without excess of hydrochloric acid which interferes with the reaction. Very often, during a somewhat prolonged ebullition of the liquid, the
Mechanics, Physics, and Chemistry.
M. E. Soubeiran, from w h o m we take the above description, say that the water made in this w a y isofexcellent quality. The apparatus will serve equally well for the preparation of elfervescing lemonades, or wines, or mineral waters charged with different salts, by replacing the water of the carafe by the appropriate liquid. The apparatus is made of very thick glass, and each piece is submitted, before sale, to the test of a very strong pressure ; for greater security, the two vessels are covered with plaited reeds, which, in case of fracture, prevent the glass from flying. This effect has been proved by actua[ experiment.
Soubeiran's Recipe for Indelible h~k. Translated for the Journal of the Franklin Institute.
Crystallized nitrate of silver, S parts by weight. ,, ,, of copper, q " ,, carbonate of soda, 4 " " aqlla ammonite, 100 " Dissolve and keep in a well-corked bottle. This ink is, of course, to be used without any preparatory liquid. But as the editor of the Journal de Pharmaeie justly remarks, requires a certain quantity of gum ( s a y - - g u m - A r a b i c pulverized, 50 parts,) to allow it to be used as an ink.~Journal de _Pharrnacie et de Chimie, Februarff, 1848.
Test for Organic Matter i7~ Solution i~ ./lbnormal Quantities in Water. Translated for the Journal of the Franklin Institute. M. Alph. Dupasquier proposes the chloride of gold for the purpose of detecting organic matter when present in water in such large proportions as to make it unhealthy to drink, or improper for use in the arts. Into a small glass vessel he introduces from 20 to 25 grammes, (300 or 400 graius,) of the water to be tested, and adds a few drops of a solution of chloride of gold, (carefitlly freed from excess of acid,) so as to give it a slight yellowish tint: the liquid is then boiled. I f the water contains only the quantity of organic matters common to drinkable waters, it retains its color, eveu after long boiling. But if, on the contrary, it contains an abnormal quantity, it first turns brown, then takes a violet, or blush tint, which indicates the decomposition of the gold salt by the organic matter. By prolonging the ebullition, the violet, or bluish tint becomes deeper and deeper, if the proportion of organic matter is considerable, lint a slight brownish, or greenish tint, is sufficient to indicate certainly, that the quantity of organic matter is greater than usual. The salt must be used without excess of hydrochloric acid which interferes with the reaction. Very often, during a somewhat prolonged ebullition of the liquid, the