Part 8
_Father._ I can indeed give such an explanation, just as I have heard it from the lips of well-informed men, and as seems most reasonable according to the insight that God has given me. The sun has received divers offices: for it brings light and warmth to all the earth, and the various parts of the world rejoice in its approaching; but its course is planned in such a way that it sometimes withdraws from those regions that it approaches at other times. When it first comes to visit the east with warmth and bright beams, the day begins to lift up silvery brows and a pleasant face to the east wind. Soon the east wind is crowned with a golden glory and robed in all his raiments of joy. He eases griefs and regretful sighs and turns a bright countenance toward his neighbors on either side, bidding them rejoice with him in his delight and cast away their winterlike sorrows. He also sends blazing rays into the face of the west wind to inform him of his joy and happiness. He advises the west wind, too, that in the evening he shall be clad in garments similar to those which the east wind wore in the morning. Later in the day and at the proper hour the southeast wind displays the glory of his newly-gotten robes and sends warming rays with friendly messages into the face of the northwest wind. But at midday the south wind reveals how he has been endowed with riches of heat, sends warm gifts of friendship across to the north wind, warms his cool face, and invites all the neighboring winds to share in the abundance of his wealth. As the day declines the southwest wind with glad face receives the gentle sheen and genial beams. Having put away wrath, he reveals his desire for peace and concord; he commands the mighty billows and steep wave-crests to subside with waning power and calls forth quickening dews in a wish to be fully reconciled with all his neighbors. Gently he blows a refreshing breath into the face of the northeast wind, warms his wind-chilled lips, and thaws his frosty brow and frozen cheeks. But when evening begins, the west wind, clad in splendor and sunset beauty as if robed for a festal eve, lifts a gleaming brow above a blithe countenance, and sends a message on darting beams across to the east wind telling him to prepare for the festive morrow to come.
At sunset the northwest wind begins to raise his fair brows and with lifted eyelids betokens to all his neighbors that the dazzling radiance is now in his keeping. Thereupon he sends forth a shadow over the face of the earth proclaiming to all that now come the hours of rest after the toil of day. But at midnight the north wind goes forth to meet the coursing sun and leads him through rocky deserts toward the sparse-built shores. He calls forth heavy shadows, covers his face with a broad-brimmed helmet, and informs all that he is arrayed for the night watch to keep guard over his neighbors that they may have comfort and untroubled rest after the heat of day. With cool lips he gently blows upon the face of the south wind, that he may be better able to resist the violent heat of the coming day. He also scatters the dark clouds and clears up the face of heaven in order that the sun, when light appears, may be easily able to send forth his warm and radiant beams in all directions. But on the coming of morn the northeast wind begins to open his closed eyelids and blinks to both sides as if to determine whether it is time to rise. Then he opens quickly his clear eyes as if sated with sleep after ended rest. Soon he leads forth the gleaming day into all the homesteads like a fair youth and fitting herald, to give sure knowledge that the radiant sphere and shining sun follows close behind and to command all to be arrayed for his coming. Soon the sun rises and shoots forth his beams in all directions to watch over the covenant made by the winds; and after that he goes on through his ordained course as we have already told.
When peace has been established among these chiefs that we have just named, it is safe to travel wherever you may wish through the realms of any one of them. Then the sea begins to bar out all violent storms and make smooth highways where earlier the route was impassable because of broad billows and mighty waves; and the shores offer harbors in many places which formerly gave no shelter. Now, while this covenant holds, there will be fair sailing for you or any others who wish to travel to foreign shores or steer their ships over the perils of the ocean. It is, therefore, the duty of every man, indeed it is a necessary one, to learn thoroughly when one may look for dangerous seasons and bad routes, or when times come when one may risk everything. For even unwitting beasts observe the seasons, though by instinct, since they have no intellect. Even the fishes, though lacking human insight, know how to find security in the deep seas, while the winter storms are most violent; but when winter wanes, they move nearer the shores and find enjoyment as after a sorrow suffered and past. Later in the spring after the roe has come, they lay the spawn and bring forth a vast multitude of young fishes and in this way increase their race, each after its kind and class. It does, indeed, show great forethought for unintelligent creatures to provide so carefully against the coming winter storms, and to bring forth their offspring at the opening of spring, so that they may enjoy the calm weather of summer and search for food in peace and quiet along the wide shores; for thus they gather strength enough in summer against the ensuing winter to sustain themselves among other fishes in the chilly deep.
The covenant brings joy to the sky as well as to the sea; for as spring advances the birds soaring high into the air rejoice with beautiful songs in the newly made treaty of these lords as in a coming festival. Their joy is as great as if they have escaped great and terrible dangers which might arise from the strife of these chieftains. Soon they build nests upon the earth and lead birdlings forth from them, each after its kind. Thus they increase their species and care for their young in the summer that these may be able to find their own sustenance in the winter following. Even the earth rejoices in this peace-making, for as soon as the sun begins to pour out its warming rays over the face of the earth, the ice begins to thaw around the frozen grass roots; soon fragrant and fair-hued herbs sprout forth, and the earth shows that she finds gladness and festive joy in the fresh beauty of her emerald robes. She gladly offers to all her offspring the sustenance which she had to refuse them earlier because of the dearth in winter. The trees that stood with dripping branches and frozen roots put forth green leaves, thus showing their joy that the sorrow and distress of winter are past.
Unclean and repulsive beasts display insight and understanding in their ability to determine the proper time to increase their kind and to come out of their dens. They also observe the season when it is necessary to flee the cold and stormy distress of winter and seek shelter under rocks, in large crags, or in the deep scar of the landslide till the time to come forth is at hand. Wild beasts that seek their food in woods or on the mountains know well how to discern the seasons; for they bear the begotten offspring while winter is most severe, so that they may bring forth their young when the grass is fresh and the summer is warm. There is a little creeping thing called the ant, which can teach thoughtful men much practical wisdom, whether they be merchants or husbandmen, kings or lesser men. It teaches kings how to build castles and fortresses; in the same way it teaches the merchants and the husbandmen with what industry and at what seasons they ought to pursue their callings; for he who has proper insight and observes carefully the activities of the ant will note many things and derive much profit from them. All other creatures, too, whether clean or unclean, rejoice in this season, and with vigilant eyes seek their food in the warm summer time so as to be able to endure more confidently the perils of a destitute winter season. Now it is this covenant between these eight winds that calls forth all the delights of earth and sky and the calm stirring of the sea according to the command and mysterious skill of Him Who ordained in the beginning that thus should all nature remain until He should change the order of things. Now if you feel that some of these matters have not yet been fully cleared up, you may continue your inquiries and ask what questions you like.
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VI
THE TIDES AND THE CHANGES IN THE COURSE OF THE SUN
_Son._ It was a wise thought, it seems to me, to ask those questions to which I have just received such fair replies; and I am encouraged to inquire into certain other matters, namely the waxing of the sun, the moon, and the streams or tides of the ocean,—how much and how rapidly these things wax and wane. Now these things that I have brought up for discussion are subjects which especially touch the welfare of seafaring men, and it looks to me as if they would profit much from a knowledge of these matters, since it gives insight into the right conduct of their profession. And since I intend to labor diligently in the trader’s calling, I should like very much, if it can be done, to have you explain further some of those things that I have just mentioned.
_Father._ Those things that you have now asked about do not all wax or wane with equal rapidity; for the tide, when it rises, completes its course in seven days plus half an hour of the eighth day; and every seventh day there is flood tide in place of ebb. For the tide rises one seventh part daily from the time when the rise begins; and after it turns and begins to fall, it ebbs in the same way during the next seven days but is retarded as much as half an hour of the eighth day,[167] which must be added to the seven days. As to how long an hour should be I can give you definite information; for there should be twenty-four hours in two days, that is, a night and a day, while the sun courses through the eight chief points of the sky: and according to right reckoning the sun will pass through each division in three hours of the day. On the other hand, the moon, while it waxes, completes its course in fifteen days less six hours;[168] and in a like period it wanes until the course is complete and another comes. And it is always true that at this time the flood tide is highest and the ebb strongest. But when the moon has waxed to half, the flood tide is lowest and the ebb, too, is quite low. At full moon the flood tide is again very high and the ebb is strong. But when it has waned to half, both ebb and flood are quite low. Merchants are, however, scarcely able to note these changes, as the course is too swift; for the moon takes such long strides both in waxing and waning that men, on that account, find it difficult to determine the divisions of its course. The sun, on the other hand, completes its course more slowly both in ascending and declining, so that one may easily mark all the stages of its course. The sun moves upward one hundred and eighty-two and one-half days and three hours and for a like period it recedes again; it has then completed its entire course, both ascent and decline, in three hundred days, by the twelve-count[169] {360}, plus five days and six hours. Every fourth year this becomes three hundred by the twelve-count and six days more {366}; this is called leap year, for it has one day more than the preceding twelvemonth, the additional hours being gathered into twenty-four, a night and a day. In Latin all hundreds are counted by tens, and there are, therefore, properly computed three hundred by the ten-count plus sixty-six days whenever leap year occurs, while the intervening years have only five days and six hours with as many additional days by the other reckoning as I have just stated.
Footnote 167:
The mean retardation is forty-eight minutes.
Footnote 168:
This is within twenty-two minutes of the length of the lunar half-month.
Footnote 169:
The Northmen in medieval times had two hundreds, the great hundred, or duodecimal hundred, which counted 120 (12 × 10) and the ordinary hundred (10 × 10).
But to your question concerning the growth of the sun’s path, how one can most clearly discern it, I can scarcely give an answer so precise as not to be wrong in part; for the sun’s path does not wax at the same rate in all parts of the earth. I can, of course, answer according to what I have found in the writings of men who have treated the subject thoroughly, and it is generally believed that their words come very near the truth. I have already told you how many hours there are in a night and day and gave the number as twenty-four.[170] I have indicated the length of each hour in stating that three hours pass while the sun moves across one division of the sky. Now there are some other little hours called _ostensa_,[171] sixty of which make one of those that I mentioned earlier. It seems to me quite likely that, as far north as we are, the sun’s path waxes five of these little hours in a day and as much less than six as a twelfth part of a little hour. And as to the growth of the sun’s path it seems most reasonable to me that it waxes three-fourths of these hours toward the east and the west and the remaining fourth in height toward the zenith. South of us, however, this reckoning will fail; for north of us the increase is greater and to the south less than we have just stated; and the farther south, the greater is the difference, and the sun more nearly overhead.
Footnote 170:
See Brenner’s edition, 20.
Footnote 171:
Error for _ostenta_; the _ostentum_, computed at one-sixtieth of an hour, seems to appear first in the writings of Rabanus Maurus (ninth century).
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VII
THE SUBJECT OF THE SUN’S COURSE CONTINUED
_Son._ With your permission I wish to inquire somewhat more fully into this subject, for I do not quite understand it. You have said that the sun’s ascent is more rapid to the north of us, where summer is almost wanting, while the strength of winter is so overpowering that summer seems like a mere shadow, and where in many places both snow and ice lie all through summer just as in winter, as is true of Iceland and particularly of Greenland. But I have heard that in the southlands there are no severe winters, the sun being as hot in winter as it is with us in summer; and that in winter, when the sun has less power, both grain and other crops grow, while in summer the earth cannot endure the fervent heat of the sun and consequently yields neither grass nor grain; so that in regions like Apulia and even more so in the land of Jerusalem the heat of summer causes as great distress as the cold of winter with us. Now when you tell me that the sun’s path waxes faster here in the north than yonder in the south, I cannot see the reason why; for there the sun’s heat is as great in winter as it is with us in summer; and it is so much greater in summer that all vegetation on the earth is scorched by it. Therefore it seems to me more likely that the sun’s path waxes most rapidly where the heat is most intense. Now if you can and will clear this up for me so that I can grasp it, I shall listen gladly and attentively.
_Father._ I shall begin my talk on the subject that I am now to take up with a little illustration, which may help you to a clearer insight, since you find it so difficult to believe the facts as stated. If you take a lighted candle and set it in a room, you may expect it to light up the entire interior, unless something should hinder, though the room be quite large. But if you take an apple and hang it close to the flame, so near that it is heated, the apple will darken nearly half the room or even more. However, if you hang the apple near the wall, it will not get hot; the candle will light up the whole house; and the shadow on the wall where the apple hangs will be scarcely half as large as the apple itself. From this you may infer that the earth-circle is round like a ball and not equally near the sun at every point. But where the curved surface lies nearest the sun’s path, there will the greatest heat be; and some of the lands that lie continuously under the unbroken rays cannot be inhabited. On the other hand, those lands which the sun approaches with slanting rays may readily be occupied; and yet, some of these are hotter than others according as they lie nearer the sun’s path. But when the curved and steep slope of the sphere-shaped wheel moves up before the light and the beams of the sun, it will cast the deepest shadow where its curved surface lies nearest the sun; and yet, the lands nearest the sun are always hottest.[172] Now I agree with you that Apulia and Jerusalem are hotter than our own country; but you must know that there are places where the heat is greater than in either of those just mentioned, for some countries are uninhabitable on account of the heat. And I have heard it stated as a fact, that even when the sun mounts highest, the night in those regions is very dark and quite long. From this you must conclude that where the strength and power of the sun are greater, since it is nearer, it must ascend and decline more slowly; for the night is long in summer when the sun mounts highest, and the day is long in winter when it sinks lowest. Now I shall explain this so clearly that you will understand it fully.
Footnote 172:
It is evident from this discussion that the author believes in a spherical earth; elsewhere, too, he speaks of the sphere of earth (_jarðarbollr_); see c. lvi.
You know that here with us in winter the day and the course of the sun are brief; for so short is the sun’s path that it passes through but a single region of the sky, and then only where the sun has considerable strength. But in many places the sun is not to be seen during a large part of winter, for example in Halogaland,[173] as we have not only heard tell but have often and constantly learned and observed with our own eyes. For we know definitely that from about November 10 to January 10 there never comes a day so bright up north in Vaag or at Andenes[174] in Halogaland but that the stars in the sky are visible at midday as at midnight. And although the days have so much light that the stars cannot be seen, nevertheless, in most of the places that we have mentioned the sun remains invisible till January 23. But after that date the days lengthen and the sun mounts so rapidly, that beginning with April 6 daylight does not disappear before September 17, all the intervening time being one continuous day, for daylight never fails in all that while. From this you may safely conclude that, though the sun is hotter in the southern lands that we spoke of earlier, its course waxes and mounts more slowly where the night, even at mid-summer, is deep and long and dark, and where there is never a time in the whole twelvemonth when day does not fail. But in Halogaland, as I have just said, there is no day in winter and stars are visible at midday when the day should be brightest; later, however, when the days begin to lengthen, they grow so rapidly that early in spring daylight begins to tarry all the night and continues till much of the autumn is past.
Footnote 173:
Halogaland, the modern _Nordland_, is that part of Norway lying north of the sixty-fifth parallel.
Footnote 174:
Vaag and Andenes are points in the Lofoten Islands; their latitudes are 68° 12´ 35″ and 69° 18´ 50″ respectively.
There remains one more proof which will seem very clear to you. You know that in those localities in Halogaland that we have just mentioned the sun about May 15 begins to shine with the same brightness by night as by day, never setting either at night or during the day but shining continuously in this manner and with this brightness, except when its light is obscured by clouds, even to July 25. Now you know that the sun is only moderately warm in Halogaland, and that there is but a little time in summer when it gives sufficient warmth. Still, there it is with its blazing disk about as long as we have just stated, and it maintains the daylight about as long as we have just computed. But neither fact is true of the southlands, though the sun is hotter there. Now these facts give evidence that the sun is more distant here, for it gives less heat. They also testify to the waxing of its course, for, since its light is as bright by night as by day, its path must lengthen more rapidly here. But yonder it waxes less and more slowly, for there the night has its prescribed period both for length and darkness in summer as well as in winter.
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VIII
THE MARVELS OF NORWAY