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REDUCING AGENTS.--The distinction between reducing agents and fluxes (too often ignored) is an important one. Fluxes yield slags; reducing agents give buttons of regulus or of metal. The action of a reducing agent is the separation of the oxygen or sulphur from the metal with which it is combined. For example, the mineral anglesite (lead sulphate) is a compound of lead, sulphur, and oxygen; by carefully heating it with charcoal the oxygen is taken away by the charcoal, and a regulus of lead sulphide remains. If the regulus be then fused with metallic iron the sulphur is removed by the iron, and metallic lead is left. The charcoal and the iron are reducing agents. But in defining a reducing agent as one which removes oxygen, or sulphur, from a metallic compound so as to set the metal free, it must be remembered that sulphur itself will reduce metallic lead from fused litharge, and that oxygen will similarly set free the metal in fused lead sulphide. There is no impropriety in describing sulphur as a reducing agent; but it is absurd to call oxygen one. Some confusion will be avoided if these substances and those which are opposite to them in property be classed as oxidising and de-oxidising, sulphurising, and de-sulphurising agents. Most oxidising agents also act as de-sulphurisers.

Then it was that the youngest of the eight ruling men, in a moment of compassion, confessed his guilt, admitting in a plea to the head-chief for clemency that he was in fact responsible for the attitude his wife had taken. This served only to renew the old chief's anger; he stoutly refused to listen to further appeals and expressed his regret that the first seeds of wrong should have been thus sown. No longer able to keep up the fight, with starvation staring them in the face, and being in nakedness, at the end of the fourth year the women attempted to swim the river in parties, but the attempts resulted only in death, for the swift current would have been too much even for the strongest men to buffet. Seeing this self-sacrifice and realizing that the race would be ultimately exterminated if the women continued it much longer, appeals were made daily to the head-chief to permit the rescue of the remainder. Four times was he sought to grant such permission before he consented, then at dawn of the fifth morning he gave directions to loose the rafts and ferry the women over. A miserable remnant they were, unclad, wan, and wasted; but a return to the old habits of life soon restored them to their former selves, and peace, happiness, and prosperity reigned again.

The men agreed to this. As I could not trust any of them, I took the precaution to take along with me all my notebooks and the maps I had made of the entire region we had crossed, four hundred glass negatives which I had taken and developed, a number of unexposed plates, a small camera, my chronometer, one aneroid, a sextant, a prismatic compass, one other compass, and a number of other things which were absolutely necessary. The rest of the baggage I left at that spot. I begged the men to take special care of the packages. All I asked of them was to prop them up on stones so that the termites and ants should not destroy my possessions, and to make a shed with palm leaves so as to protect the packages as much as possible from the rain. The men promised to do all this faithfully. We drew lots as to who were to be the two to accompany me on the difficult errand across the virgin forest. Fate selected Filippe the negro and Benedicto, both terribly ill.

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