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From the street came the iambic cry of the fool, "Come hame, come hame." Tycho Brahe, I think, is said to have kept a fool, who frequently sat at his feet in his study, and to whose mutterings he used to listen in the pauses of his own thought.
To this Tycho objected, and Kepler had great difficulty in convincing him that the new move would be any improvement, but undertook to prove to him by actual examples that a false position of the orbit could by adjusting the equant be made to fit the longitudes within five minutes of arc, while giving quite erroneous values of the latitudes and second inequalities.
An interesting practical discovery made by Tycho was his method of determining the latitude of a place by means of two observations made at an interval of twelve hours. Hitherto it had been necessary to observe the sun's angle on the equinoctial days, a period of six months being therefore required.
And Tycho, though one of the most perfect, is by no means the largest crater on the moon. Another, called ``Theophilus, has a diameter of sixty-four miles, and is eighteen thousand feet deep. There are hundreds from ten to forty miles in diameter, and thousands from one to ten miles. They are so numerous in many places that they break into one another, like the cells of a crushed honeycomb.
It is possible that had he done this before leaving Hveen it might have had more effect, but it can be readily seen from the tone of the king's unfavourable reply that his departure was regarded as an aggravation of previous shortcomings. Driven from Rostock by the plague, Tycho settled temporarily at Wandsbeck, in Holstein, but towards the end of 1598 set out to meet the Emperor at Prague.
Nor are the inventors of those optical instruments, who had contributed to the advancement of this science beyond all previous anticipation, omitted in this extensive survey of its nature, progress, and history. After celebrating "the gigantic energies and more than heroic labors of Copernicus, Tycho Brahe, Kepler, and Galileo," he pronounced Newton "the consummation of them all."
During the years 1567 and 1568, Tycho continued to reside at Rostoch, with the exception of a few months, during which he made a rapid journey into Denmark.
It will be understood, therefore, that the bubblings of this central eruption have kept their first forms. Crystallised by cooling, they have stereotyped the aspect which the moon formerly presented under the influence of Plutonic forces. The distance which separated the travellers from the circular summits of Tycho was not so great that the travellers could not survey its principal details.
For Mars would then be a great deal nearer to the earth than at other times. It would also explain the retrograde motion of planets when in opposition. We must here notice that at this stage Copernicus was actually confronted with the system accepted later by Tycho Brahe, with the earth fixed.
When Rudolph saw the magnificent instruments which Tycho had brought along with him, and had acquired some knowledge of their use, he pressed him to send to Denmark for the still larger ones which he had left at Stiern-berg.
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