Vietnam or Thailand ? Vote for the TOP Country of the Week !
Updated: June 1, 2025
Spots which become apparent by using vapor of iodine are due to chemical agents whose strength has altered either the fibers of the surface, or the paste uniting them. In a word, the test of a document or paper by vapor of iodine has the double advantage of indicating the place of the supposed alteration and operating afterwards with appropriate reagents to bring back the traces of ink.
If this substance be dissolved by a process of coction, and the employment of certain chemical reagents, the fibres can then be easily separated, washed, and cleansed from all foreign matter. According to the mode of treatment, the woolly substance is fine or coarse, and is employed as wadding in the one case, and in the other as stuffing for mattresses.
We must hold council at the Grandlieus'. We are all concerned in this matter, and Serizy happily will lend us his aid." Extreme peril as we have observed in the scenes in the Conciergerie has a hold over the soul not less terrible than that of powerful reagents over the body. It is a mental Voltaic battery.
She carried the brimming cup of her inestimable virtues with a cautious, steady hand, and an eye always on them, to see that they did not spill. Then she was an admirable judge of character. Her mind was a perfect laboratory of tests and reagents; every syllable you put into breath went into her intellectual eudiometer, and all your thoughts were recorded on litmus-paper.
These instructions must, therefore, be considered to be as much a part of all subsequent procedures as the description of apparatus, reagents, or manipulations. The analytical balance, the fundamentally important instrument in gravimetric analysis, has already been described on pages 11 to 15.
Surely there must be some scars left after such grafting. I picked up the various sets of prints. It was true that the third set was not very clear, but there certainly were no scars there. "Though there is no natural changeability of finger-prints," pursued Kennedy, "such changes can be induced, as Dr. Paul Prager of Vienna has shown, by acids and other reagents, by grafting and by injuries.
Nearly pure samples of this mineral are easily obtainable and should be used for practice, since many impurities, notably iron, seriously interfere with the accurate determination of the antimony by iodometric methods. It is, moreover, essential that the directions with respect to amounts of reagents employed and concentration of solutions should be followed closely.
The two doctors who made the autopsy were obliged to confess that they could not discover the faintest trace of any kind of foul play; their most exquisite tests and reagents failed to detect the presence of poison in the most infinitesimal quantity. Death, they found, had been caused by a somewhat obscure and scientifically interesting form of brain disease.
If, having completed our survey of what has been done in the way of decomposing the alkaloids by the different classes of reagents, we review the field, it will be seen that with all the alkaloids mentioned, except the last four, a more or less immediate connection with the pyridine and quinoline bases has been indicated.
Indeed, Ladenberg has recently succeeded in obtaining benzol as an alteration product from pyridine, in certain reactions. We may now look at the question of the decomposing effect of reagents upon the alkaloids.
Word Of The Day
Others Looking