Arsenic is chemically very similar to its predecessor phosphorus, so much so that it will partly substitute for it in biochemical reactions and is thus poisonous. When heated it rapidly oxidizes to arsenous oxide, which has a garlic odor. Arsenic and some arsenic compounds can also sublime upon heating, converting to gaseous form directly. Elemental arsenic is found in two solid forms: yellow and gray/metallic, with [specific gravities of 1.97 and 5.73, respectively.
Lead arsenate has been used, well into the 20th century, as a pesticide on fruit trees (resulting in neurological damage to those working the sprayers), and copper arsenate has even been recorded in the 19th century as a coloring agent in sweets. Other uses;
Arsenic (Greekarsenikon, meaning "yellow orpiment") has been known and used since ancient times. It has been frequently used for murder, the symptoms of arsenic poisoning being somewhat ill-defined, until the advent of the Marsh test, a sensitive chemical test for its presence.
Arsenopyrite also called mispickel (FeSAs) is the most common mineral from which, on heating, the arsenic sublimes leaving ferrous sulfide.
The most important compounds of arsenic are white arsenic, its sulfide, Paris green, calcium arsenate, and lead arsenate. Paris green, calcium arsenate, and lead arsenate have been used as agricultural insecticides and poisons. It is sometimes found native, but usually combined with silver, cobalt, nickel, iron, antimony, or sulfur.
Arsenic and many of its compounds are especially potent poisons.
Arsenic kills by massively disrupting the digestive system, leading to death from shock. See arsenic poisoning.
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the writing-table to sign some papers intended for the town-hall; for his
him, and seized the pen.html">pen. Just at that moment the door of the room gently
a light foot. He doubtless heard it, but did not allow himself to be
junior, she seemed like a timid girl, as she raised her arm, yet did not
pretty head.html">head aside, and blushing faintly, exclaimed with downcast eyes:
"It is I, Peter!"
"Very well, my child," he answered curtly, raising the second paper
timidity. "I have something to tell you."
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sparkling in her eyes, as she continued in a voice pervaded with a
other to-day. My heart.html">heart is so full, and what I would fain say to you is,
sounding half impatient, half beseeching. "First the city and the
quivering lips:
"That is what you have said ever since the first day of our marriage."
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delicate cheeks, and with quickened breathing, she answered in a hasty,
I am my father's daughter never opposed them, but now they are no longer
all for the wife.'"
Van der Werff laid down his pen and turned full towards her.
Maria's slender figure seemed to have grown taller, and the blue eyes,
been created by God especially for him. His heart opened to her, and
come."
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willingly what our native land demands."
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