“Niver a taste,” said Larry. “It’s meself is as innocent about ’em as the babe unborn; an’ as for Muggins there, he don’t know more about ’em than my ould shoes—”
“Or your old grandmother,” growled Muggins.
“Don’t be irriverent, ye spalpeen,” said Larry.
“I ax her reverence’s pardon, but I didn’t know she wos a priest,” said Muggins.—“Go on, Cap’n Dall.”
“Well,” continued the captain, “you know, at all events, that there’s salt in the sea, and I may tell you that there is lime also, besides other things. At the equator, the heat bein’ great, water is evaporated faster than anywhere else, so that there the sea is salter and has more lime in it than elsewhere. Besides that it is hotter. Of course, that being the case, its weight is different from the waters of the cold polar seas, so it is bound to move away an’ get itself freshened and cooled. In like manner, the cold water round the poles feels obliged to flow to the equator to get itself salted and warmed. This state of things, as a natural consequence, causes commotion in the sea. The commotion is moreover increased by the millions of shell-fish that dwell there. These creatures, not satisfied with their natural skins, must needs have shells on their backs, and they extract lime from the sea-water for the purpose of makin’ these shells. This process is called secretin’ the lime; coral insects do the same, and, as many of the islands of the south seas are made by coral insects, you may guess that a considerable lot of lime is made away with. The commotion or disturbance thus created produces two great currents—from the equator to the poles and from the poles to the equator. But there are many little odds and ends about the world that affect and modify these currents, such as depth, and local heat and cold, and rivers and icebergs, but the chief modifiers are continents. The currents flowin’ north from the Indian Ocean and southern seas rush up between Africa and America. The space bein’ narrow—comparatively—they form one strong current, on doublin’ the Cape of Good Hope, which flies right across to the Gulf of Mexico. Here it is turned aside and flows in a nor’-easterly direction, across the Atlantic towards England and Norway, under the name of the Gulf Stream, but the Gulf of Mexico has no more to do with it than the man in the moon, ’xcept in the way of turnin’ it out of its nat’ral course. This Gulf Stream is a river of warm water flowing through the cold waters of the Atlantic; it keeps separate, and wherever it flows the climate is softened. It embraces Ireland, and makes the climate there so mild that there is, as you know, scarcely any frost all the year round—”
“Blissin’s on it,” broke in Larry, “sure that accounts for the purty green face of Erin, which bates all other lands in the world. Good luck to the Gulf Stream, say I!”
“You’re right, Larry, and England, Scotland, and Norway have reason to bless it too, for the same latitudes with these places in America have a rigorous winter extendin’ over more than half the year. But what I was comin’ to was this—there are, as you know, eddies and stagnant places in ornary rivers, where sticks, leaves, and other odds and ends collect and remain fixed. So, in this great ocean river, there are eddies where seaweed collects and stagnates, and where the air above also stagnates (for the air currents are very much like those of the sea). These eddies or stagnant parts are called sargasso seas. There are several of them, of various sizes, all over the ocean, but there is one big one in the Atlantic, which is known by the name of the ‘Doldrums.’ It has bothered navigators in all ages. Columbus got into it on his way to America, and hundreds of ships have been becalmed for weeks in it since the days of that great discoverer. It is not very long since it was found out that, by keeping well out of their way, and sailing round ’em, navigators could escape the Doldrums altogether.”
The captain paused at this point, and Larry O’Hale took the opportunity to break in.
“D’ye know, sir,” said he, “that same Gulf Strame has rose a lot o’ pecooliar spekilations in my mind, which, if I may make so bowld, I’ll—”
Here the mate’s voice interrupted him gruffly with—