High latitude

“ Who on the face of the earth would think that at an altitude of four thousand four hundred feet above the level of the sea, and in latitude nearly forty-one, and near the southern limit of the isothermal line, such nicely-flavored, delicate fruit could be raised! ”

“ As at sea there is, within certain degrees of latitude and longitude, an uphill and a downhill, made by the convexity of the globe, we, perhaps, may have reached the meridian of the great voyage, and may have begun to feel the inclination which will set us forward more swiftly to the end. ”

“ As they move north they are continually coming to parts of the globe having smaller circles of latitude than those they have left, and therefore not moved forward as rapidly by the earth's daily rotation as the latitudes nearer the equator. ”

“ When, after a weary climb, we find ourselves on the summit of a lofty mountain, and look back from that commanding altitude over the ground we have traversed, what is it that we behold? The minor details of the scenery, many of which seemed large and important to us as we passed, are now lost to view, and we see only the great and imposing features of the landscape, the high elevations, the town-studded valleys, the deep and winding streams, the broad forests. ”

“ When seen from high altitudes, a mountain appears merely as a part of a vast panorama or a single element in a wild, limitless scene of desolate peaks, which raise their bare, bleak summits among the sea of mountains far up into the cold regions of the atmosphere, where they become white with eternal snow, and bound by rigid glaciers. ”

“ This is a moderate altitude, even when compared with the eighty miles in question; and I could not help thinking that the subject admitted room for doubt, and great latitude for speculation.
But, in point of fact, an ascension being made to any given altitude, the ponderable quantity of air surmounted in any farther ascension, is by no means in proportion to the additional height ascended, (as may be plainly seen from what has been stated before,) but in a ratio constantly decreasing. ”

“ Altitude is ever refreshing. The dust-filled, noise-crowded air is far below. From these scenic mountain heights one commands a new world of mountainous cloud-scenery in the sky. Grand, deep, blue gorges lie open in the cloud plateaus and mountains. To the enraptured eye the shifting clouds sometimes become continents and islands, real lands where people live, landscapes upon whose sunny hills and forested mountains shadows of other clouds fall, and across whose expanding plains many winding rivers run. ”

“ Put in your Note-Book:
Any person taking an altitude of a celestial body must be, for all practical purposes, on a straight line which is at right angles to the true bearing of the body observed.
It should be perfectly clear now that if the sun bears due North or South of the observer, i.e., if the sun is on the observer's meridian, the resulting line of position must run due East and West. In other words it is a parallel of latitude. [Pg 63] And that explains why a noon observation is the best of the day for getting your latitude accurately. ”

“ As we advance still further north, the elevation of the diurnal circle above the horizon grows less and less, and consequently, the motions of the heavenly bodies more and more oblique to the horizon, until finally, at the pole, where the latitude is ninety degrees, the angle of elevation of the equator vanishes, and the horizon and the equator coincide with each other, as before stated. ”

“ An altitude may be taken of any body and after a suitable change in bearing has taken place (not less than 30°) a second altitude may be taken and the first longitude advanced for the run during the interval to the parallel of the latitude by dead reckoning at the time of second sight. ”

“ Thus it is, that throughout the table lands, the geographical position, as far as latitude is concerned, is entirely neutralized by the extreme rarefaction of the atmosphere obtained by ascending through loftier regions. ”

“ We were now to the northward of the line, and every day added to our latitude. The Magellan Clouds, the last sign of South latitude, were sunk in the horizon, and the north star, the Great Bear, and the familiar signs of northern latitudes, were rising in the heavens.
Next to seeing land, there is no sight which makes one realize more that he is drawing near home, than to see the same heavens, under which he was born, shining at night over his head. ”

“ The sky was charged with large and heavy clouds; and a broad, deep, and as it were stormy, tint of dark purple ... mantled every mountain which we saw--with the exception of our old gigantic friend, of which the summit was buried in the clouds. At a given distance, you form a tolerably good notion of the altitude of mountains; and from this latter view of those in question, I should think that the highest may be about 3000 feet above the level of the lake. ”

“ We beat clear of the latitude of roaring gales blind with snow, and mountainous ice-islands like cities of alabaster in ruins, and seas ridging in thunder and foam to the height of our mizzentop, and heading north blew under wide wings of studding sails towards the sun, every day sinking some southern stars out of sight, and every night lifting above the sea-line some gem of the heavens dear to northern eyes. ”

“ This, therefore, at any instant defines the position where the sun is vertical; its latitude must equal the sun’s declination and its longitude in time equal the time since noon at Greenwich. Now at distance of 60 m. in every direction on the surface of the earth from the point thus defined the sun will have an altitude of 89° and in all directions at a distance of 1200 m. ”

“ Forests, hills, and mountains followed after, as our altitude was increased, blending together like a hazy landscape, until, on passing above the cloud region, and finding the level of our track, the earth was wholly lost to our view, and our course lay through the blue serene of space, without a lighthouse or a landmark, and nothing but the constant lamps of heaven to guide us in our passage. ”

“ And when they came again, one set forth this: "If it seem difficult to look at life in the big, close-at-hand, because the detail mountains seem to obstruct the view; then we must get altitude, so that these mountains, no matter how near, may dwindle to mole-hills at our feet, and our horizon stretch beyond the ends of the earth." ”

“ Tabulated altitude interpolated for increments of latitude, declination, or hour angle. If no interpolation is required, the tabulated altitude and computed altitude are identical. 2. Altitude determined by computation, table, mechanical computer, or graphics, particularly such an altitude of the center of a celestial body measured as an arc on a vertical circle of the celestial sphere from the celestial horizon. ”

“ This results from the land being warmer than the water. Its atmosphere is lighter. The cold, dense wind of the sea rushes in to replace it. From this cause, in the upper regions the wind blows towards the land from every quarter. It would be advisable to make long tacks between the real and apparent parallel. When the latitude by observation differs from the latitude by dead reckoning, by not more than three minutes in thirty miles or by four minutes in sixty miles, you are in the true course."
The captain bowed, but the old man saw him not. ”

“ The mountains rose in confused masses to a great altitude, while the most distant peak at the extremity of the reach resembled a cut sapphire, its snow lines sparkling in the sun like the gleams of light on the facets of a gem. ”

“ In cases where a mountain chain rests upon a plateau, rising up in the very heart of it, its summits seem to be not high, although the basis, the true foot of the chain, may not be at the level of the plateau, but far lower, and such mountains may, therefore, be of great absolute height. ”

“ But as a mountain is, in circumference and altitude, always beckoning us on, as if saying, "My summit is not far away, but near," and so spurring our laggard steps to espouse the ascent, and toiling on, on, still on, a little further—only a little further—till heart and flesh all but fail and faint, but for the might of will, we fall to rise again, and try once more, till we fall upon the summit, and lie on thresholds leading to the stars. ”

“ I may further observe, that owing to the rotundity of the earth, and the allowance to be made in every mile, it does not require that the clouds should be very far away to be partly below the horizon. When we place our eye on a level with the ground and look along a flat country, at ten miles’ distance a man must be seventy feet high for his head to be seen above the horizon ”

“ The whole panorama of valley, mountain, glacier, and snow has an effect, at an elevation, of majestic repose. The observers were far above the noises of avalanches and rivers and nature’s forces were reduced to mere insignificance as they gazed thousands of feet below them upon the scenery. Many of the mountains they saw had not before been seen by human eye. ”

“ The far mountain lifts its peak in glory, bathed in the radiance of the rising or the setting sun. Its rugged sides are softened by the distance. A nearby view dicloses only the common rock and brush and withered grass and sun-baked earth ”

“ The air, though hot, according to its proper latitude, yet that heat so moderated by the cool breezes from the mountains, that it was rather equal to the plain countries in other parts of the world in the latitude of 50° than to a climate in 38 to 40°. ”

“ To climb this path yourself is to find the sky not so near after all. Standing on the summit, you realize first the depth of its great dome and the wide sweep of sea that rims the islands round. Here are but gray ledges that rise out of an immensity which dwarfs them. Far to the north and west is a thin, blue line of land that lifts in the farthest distance the peaks of the White Mountains. All else is but a vast expanse of sea that seems as if it might rise in a storm and overwhelm these rocks that it has washed so white and smooth. ”

“ The observations thus far made showed that the changes in latitude were periodic in character, that is, the latitude of any place would increase for a certain length of time and then decrease to a minimum value and so on, continuing to oscillate between certain limits. It is easily seen that such changes in the latitude of any place may be ”

“ Continuous highlands or plateaus seldom attain an elevation greater than a half or a third of the loftiest mountains; the most elevated range in altitude, from 8000 to 12,000 feet above the sea level. On an average, they lie about 4000 to 5000 feet above the sea. We take the last height as a convenient point of demarkation between the two classes of highlands—those of the first and those of the second magnitude. ”

“ If you are living not far from latitude 40° north, which is the median latitude of the United States, you must, after determining as closely as you can the situation of the north point, look upward along the meridian in the north until your eyes are directed to a point about 40° above the horizon. ”

“ Mine is of altitude, like that which you brought only yesterday. Altitude is a pretty good thing. If there are clouds, don't stay under them; they may be misty to pass through; but the light upon them from above is wonderful. ”

“ At an altitude of 6,193 feet, or more than a mile and one-fifth above sea-level, the line of vision bounds a circle nearly a thousand miles in circumference; and within that circle are lakes, rivers, mountains, valleys, dark forests, smiling villages, and in fact a variety of scenery, ever changing as the gaze is [88]
[89] directed to the different points of the compass. In a clear day, the distant glimmer of the Atlantic may be seen, away to the southeast. ”

“ Moreover, an elevation of 5,000 or 6,000 feet places us, especially in winter, to a great extent above the region of cloud, and thus enables us to enjoy a bright sun at time when clouds effectually cut off his rays from lower altitudes. ”

“ Away to the North and East the horizon was filled with mountains, whose summits the foot of man had never trod, but the intervening distance was covered with clouds, out of which rose the snowy domes, like islands in a sea. ”

“ At times, upon the crest of the Continental Divide, and at an altitude of from ten to twelve thousand feet, I have covered from three to five miles in an hour. And again, while breaking a snow trail, creeping up treacherous glacier ice, or edging along the ledges, I have often reversed the digits, taking several hours to gain a single mile.
Then, too, no trip is taken twice under the same conditions. The mountains are never the same: the weather, the wind, snow or rain conditions may alter decidedly the footing upon their slopes. ”

“ The altitude of mountains depends primarily on the resultant of antagonistic agencies. There are the disturbances from below which push the mountains up, for were our earth solid and cold throughout its interior no fresh upheavals could arise. ”

“ And then, again, how futile{4} to parade the altitude of our British mountains as evidence of insignificance. They laugh to scorn all such arithmetic, and many times in a single day will wrap themselves in some magic veil, and lift their peaks and shoulders round you, till scale and altitude as expressed in figures become practically a thing of naught. ”

“ In order that a body will cross the prime vertical, the latitude must be of the same name and greater than the declination. In conditions cited above the declination of the sun is south and the latitude is north, hence the body will never be on the prime vertical. ”

“ There is the broad expanse and reach of water, the rugged, towering mountains, thousands of feet high and reaching far into the clouds. Well known forms of vertical escarpements and conical pinnacles peculiar to basaltic formation crown the successive heights to the very mountain tops. ”