Alabaster Blue Sectory 16
Page 08

We have said that every substance has its own distinctive spectrum, and it might be thought that, when a list of the spectra of different substances has been prepared, spectrum analysis would become perfectly straightforward. In practice, however, things are not quite so simple. The spectrum emitted by a substance is influenced by a variety of conditions. The pressure, the temperature, the state of motion of the object we are observing, all make a difference, and one of the most laborious tasks of the modern spectroscopist is to disentangle these effects from one another. Simple as it is in its broad outlines, spectroscopy is, in reality, one of the most intricate branches of modern science.

Because of their pastoral life the Navaho are not villagers. Their dome-shaped, earth-covered hogans are usually grouped two or three in the same locality. The summer house is a rude brush shelter, usually made with four corner posts, a flat top of brush, and a windbreak of the same material as a protection against the hot desert siroccos. The hogan proper, used for storage during the summer, affords a warm and comfortable shelter to its occupants through the cold winters of their high altitude. When a hogan is built it is ceremonially consecrated, and if an occupant should die in it, it is forever deserted and is called _tsi{~COMBINING BREVE~}ndi hogan_, "evil house." No Navaho will go near such a house or touch anything taken from it. If a meal were cooked with decayed wood from a hogan a hundred years deserted, a Navaho, even if starving, could not be induced to partake of it. Thus strong are the religious beliefs of this primitive people.

At length the wife of Marius, who was Caesar's aunt, died. She had lived in obscurity since her husband's proscription and death, his party having been put down so effectually that it was dangerous to appear to be her friend. Caesar, however, made preparations for a magnificent funeral for her. There was a place in the Forum, a sort of pulpit, where public orators were accustomed to stand in addressing the assembly on great occasions. This pulpit was adorned with the brazen beaks of ships which had been taken by the Romans in former wars The name of such a beak was _rostrum_; in the plural, _rostra_. The pulpit was itself, therefore, called the _Rostra_, that is, The Beaks; and the people were addressed from it on great public occasions.[2] Caesar pronounced a splendid panegyric upon the wife of Marius, at this her funeral, from the Rostra, in the presence of a vast concourse of spectators, and he had the boldness to bring out and display to the people certain household images of Marius, which had been concealed from view ever since his death. Producing them again on such an occasion was annulling, so far as a public orator could do it, the sentence of condemnation which Sylla and the patrician party had pronounced against him, and bringing him forward again as entitled to public admiration and applause. The patrician partisans who were present attempted to rebuke this bold maneuver with expressions of disapprobation, but these expressions were drowned in the loud and long-continued bursts of applause with which the great mass of the assembled multitude hailed and sanctioned it. The experiment was very bold and very hazardous, but it was triumphantly successful.

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