You Cannot Get Away | My Web Site Page 169 Chapter 03 Page 03

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AEschylus did so order himself; but his life is not of that inspiriting kind that can be won through fighting the good fight only--or being believed to have fought it. His voice is the echo of a drone, drone-begotten and drone-sustained. It is not a tone that a man must utter or die--nay, even though he die; and likely enough half the allusions and hard passages in AEschylus of which we can make neither head nor tail are in reality only puffs of some of the literary leaders of his time.

~Hot air~ is the oxidising agent in roasting operations. The sulphur and arsenic of such minerals as mispickel and pyrites are oxidised by the hot air and pass off as sulphur dioxide and "white arsenic." The metals generally remain in the form of oxide, mixed with more or less sulphate and arsenate. The residue may remain as a powdery substance (a calx), in which case the process of roasting is termed calcination; or it may be a pasty mass or liquid. In the calcination of somewhat fusible minerals, the roasting should be done at a low temperature to avoid clotting; arsenic and sulphur being with difficulty burnt off from the clotted mineral. A low temperature, however, favours the formation of sulphates; and these (if not removed) would reappear in a subsequent reduction as sulphides. These sulphates may be decomposed by a higher temperature towards the end of the operation; their removal is rendered more certain by rubbing up the calx with some culm and re-roasting, or by strongly heating the calx after the addition of solid ammonic carbonate. In roasting operations, as large a surface of the substance as possible should be exposed to the air. If done in a crucible, the crucible should be of the Cornish type, short and open, not long and narrow. For calcinations, _roasting dishes_ are useful: these are broad and shallow, not unlike saucers, but unglazed. In those cases in which the products of the roasting are liquid at the temperature used, a _scorifier_ (fig. 38) is suitable if it is desired to keep the liquid; but if the liquid is best drained off as quickly as it is formed, a _cupel_ (fig. 5) should be used.

The consequence of this victory was, that Caesar's authority was established triumphantly over all that part of Gaul which he had thus freed from Ariovistus's sway. Other parts of the country, too, were pervaded by the fame of his exploits, and the people every where began to consider what action it would be incumbent on them to take, in respect to the new military power which had appeared so suddenly among them. Some nations determined to submit without resistance, and to seek the conqueror's alliance and protection. Others, more bold, or more confident of their strength, began to form combinations and to arrange plans for resisting him. But, whatever they did, the result in the end was the same. Caesar's ascendency was every where and always gaining ground. Of course, it is impossible in the compass of a single chapter, which is all that can be devoted to the subject in this volume, to give any regular narrative of the events of the eight years of Caesar's military career in Gaul. Marches, negotiations, battles, and victories mingled with and followed each other in a long succession, the particulars of which it would require a volume to detail, every thing resulting most successfully for the increase of Caesar's power and the extension of his fame.

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