Saturday, February 8, 2020

The forms of ice-crystals must include all others.


February 8. 

2 p. m. — Up river to Fair Haven Hill. Thermometer 43. 

40° and upward may be called a warm day in the winter. We have had much of this weather for a month past, reminding us of spring. February may be called earine (springlike). 

There is a peculiarity in the air when the temperature is thus high and the weather fair, at this season, which makes sounds more clear and pervading, as if they trusted themselves abroad further in this genial state of the air. 

A different sound comes to my ear now from iron rails which are struck, as from the cawing crows, etc. Sound is not abrupt, piercing, or rending, but softly sweet and musical. It will take a yet more genial and milder air before the bluebird's warble can be heard.

Walking over Hubbard's broad meadow on the softened ice, I admire the markings in it. The more interesting and prevailing ones now appearing ingrained and giving it a more or less marbled look, — one, what you may call checkered marbling (?), consisting of small polygonal figures three quarters [of an inch in] diameter, bounded by whitish lines more or less curved within the ice, and apparently covered with an entire thin surface ice, and so on for rods (these when five or six inches wide make a mackerel-sky ice); the other apparently passing from this into a sort of fibrous structure of waving lines, hair-like or rather flame-like, — call it phlogistic : — only far more regular and beautiful than I can draw. 


Sometimes like perhaps a cassowary's feathers, the branches being very long and fine. This fibrous or phlogistic structure is evidently connected with the flow of the surface water, for I see some old holes, now smoothly frozen over, where these rays have flowed from all sides into the hole in the midst of the checked ice, making a circular figure which reminded me of a jellyfish:  only far more beautiful than  this. 

The whitish lines which bound these figures and form  the parallel fibres are apparently lines of fine bubbles more dense than elsewhere. I am not sure that these markings always imply a double or triple ice, i. e. a thinner surface ice, which contains them. 

The ice is thus marked under my feet somewhat as the heavens overhead; there is both the mackerel sky and the fibrous flame or asbestos-like form in both. The mackerel spotted or marked ice is very common, and also reminds me of the reticulations of the pickerel. 

I see some quite thin ice which had formed on puddles on the ice, now soaked through, and in these are very interesting figures bounded by straight and crinkled particularly white lines. I find, on turning the ice over, that these lines correspond to the raised edges of and between bubbles which have occupied a place in the ice, i. e. upward [?] in it. 

Then there is occasionally, where puddles on the ice have frozen, that triangular rib-work of crystals, — a beautiful casting in alto-relievo of low crystaling as to form triangular and other figures. Shining splinters in the sun. Giving a rough hold to the feet.

One would think that the forms of ice-crystals must include all others.

I see hundreds of oak leaves which have sunk deep into the ice. Here is a scarlet oak leaf which has sunk one inch into the ice, and the leaf still rests at the bottom of this mould. Its stem and lobes and all their bristly points are just as sharply cut there as is the leaf itself, fitting the mould closely and tightly, and, there being a small hole or two in the leaf, the ice stands up through them half an inch high, like so many sharp tacks. 

Indeed, the leaf is sculptured thus in bas-relief, as it were, as sharply and exactly as it could be done by the most perfect tools in any material. But as time has elapsed since it first began to sink into the ice, the upper part of this mould is enlarged by melting more or less, and often shows the outline of the leaf exaggerated and less sharp and perfect. 

You see these leaves at various depths in the ice, — many quite concealed by new ice formed over them, for water flows into the mould and thus a cast of it is made in ice. 

So fragments of rushes and sedge and cranberry leaves have on all sides sunk into the ice in like manner. 

The smallest and lightest-colored object that falls on the ice begins thus at once to sink through it, the sun as it were driving it; and a great many, no doubt, go quite through.This is especially common after a long warm spell like this. 

I see, even, that those colored ridges of froth which have bounded the water that overflowed the ice, since they contain most of the impurities or coloring matter, sink into the ice accordingly, making rough furrows an inch or more deep often. The proper color of water is perhaps best seen when it overflows white ice. Pliny could express a natural wonder. 

About an old boat frozen in, I see a great many little gyrinus-shaped bugs swimming about in the water above the ice. 

H. D. Thoreau, Journal, February 8, 1860



40° and upward may be called a warm day in the winter
. See January 25, 1860 ("Above 40° is warm for winter.") ; March 20, 1855 ("It is remarkable by what a gradation of days which we call pleasant and warm, beginning in the last of February, we come at last to real summer warmth. At first a sunny, calm, serene winter day is pronounced spring, or reminds us of it; and then the first pleasant spring day perhaps we walk with our greatcoat buttoned up and gloves on.”); April 26, 1860 (" To-day it is 53° at 2, yet cold, such a difference is there in our feelings.What we should have called a warm day in March is a cold one at this date in April.”)

February may be called earine (springlike). There is a peculiarity in the air at this season, which makes sounds more clear and pervading.. . .It will take a yet more genial and milder air before the bluebird's warble can be heard.
See February 9, 1854 (" There is a peculiar softness and luminousness in the air this morning, perhaps the light being diffused by vapor. It is such a warm, moist, or softened, sunlit air as we are wont to hear the first bluebird's warble in. . . .The voices of the school-children sound like spring. . . . February belongs to the spring; it is a snowy March"); February 24, 1857 ("[A]s I cross from the causeway to the hill, thinking of the bluebird, I that instant hear one's note from deep in the softened air.")

A different sound comes to my ear now from iron rails which are struck  See   February 16, 1855 ("Sounds sweet and musical through this air, as crows, cocks, and striking on the rails at a distance.”); February 24, 1852 ("I now hear at a distance the sound of the laborer's sledge on the rails. The very sound of men's work reminds, advertises, me of the coming of spring.”)

Here is a scarlet oak leaf which has sunk one inch into the ice, and the leaf still rests at the bottom of this mould. Compare February 2, 1860 (" Oak leaves, absorbing the heat of the sun, have sunk into the ice an inch in depth and afterward been blown out, leaving a perfect type of the leaf with its petiole and lobes sharply cut, with perfectly upright sides, so that I can easily tell the species of oak that made it.")

I see a great many little gyrinus-shaped bugs swimming about in the water above the ice. See February 10, 1860 ("Those little gyrinus-shaped bugs of the 8th, that had come out through a crevice in the ice about a boat frozen in, and were swimming about in the shallow water above the ice, I see are all gone now that that water is frozen, — have not been frozen in; so they must have returned back under the ice when it became cold,. . .That is, in a thaw in the winter some water-insects — beetles, etc. — will come up through holes in the ice and swim about in the sun."); February 28. 1860 ("Looking from Hubbard's Bridge, I see a great water-bug even on the river, so forward is the season.") See also A Book of the Seasons, by Henry Thoreau, the Water-bug (Gyrinus) and Skaters (Hydrometridae)

A Book of the Seasons by Henry Thoreau, February 8

A Book of the Seasons,  by Henry Thoreau
 "A book, each page written in its own season, 
out-of-doors, in its own locality."
 ~edited, assembled and rewritten by zphx ©  2009-2023

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