BY A. W. ROBERTS.

[Illustration]

When visiting the sea-shore for the purpose of gathering sea-weeds, or

to learn something of their modest and simple lives, it will be noticed

that twice in every twenty-four hours the water advances and recedes,

affording an opportunity for the collector to follow the beach down to

the lowest tide-mark, and thus make sure of some small portion of the

beautiful marine vegetation of the wondrous ocean.

[Illustration]

The first band or zone of sea-weeds encountered is that of the coarse

olive-green sea-weeds commonly called bladder-weed or rock-weed. This

alga is easily distinguished by the double series of round air-vessels

with which the fronds are studded, and the coarse midrib running up the

centre of each frond. On all rocky coasts several varieties of this

family of sea-weeds are to be met with. When trodden on, the air-vessels

explode with a sharp report; from this fact it has been christened, by

young people living on the coast, the snap-weed, to whom it affords much

amusement. On this coarse weed, and under its dark and damp masses, in

the tide pools and on the rocks on which it grows, are to be found many

varieties of our most delicate and beautiful sea-weeds.

After the olive-green zone has been passed, the bright greens, brilliant

reds, and purples are reached.

Sea-weeds are rootless plants, and do not derive their support from the

earth, as do other plants, but obtain their entire subsistence from the

water. The small flat disk to be found on the end of the main branch is

only for the purpose of adhering to the rocks, stones, or other objects

on which they may be found attached.

I have figured five of the most beautiful types of sea-weeds common on

our coast, but they are so learnedly and scientifically named (being

without common names), as, for instance, _Polysephonia urceolata_, that

I have depended on the simple figures to enlist the reader's interest,

and have avoided the discouraging scientific names.

[Illustration]

On many of the apple stands in the city of New York may be seen a dark

purple-colored substance for sale; this is a sea-weed imported from the

coast of Ireland, and is called sloake, or lava. By many it is

considered as great a delicacy as pea-nuts. When mounted, it makes a

very handsome specimen. The best paper for mounting the sea-weeds is

ordinary drawing-paper, cut to a uniform size.

[Illustration]

After the specimens have been thoroughly washed, the finest should be

separated from the coarser ones, and placed in wide and shallow dishes

filled with clean fresh water. Sheets of the drawing-paper are slipped

under the specimens, which are arranged in a natural and graceful

position as they float over the immersed paper. A camel's-hair brush and

a coarse needle, with the assistance of the fingers, are all that are

required for the arranging of the sea-weeds on the paper. When the

specimen is in proper position, it is slowly and carefully lifted from

the water on the drawing-paper, so as to retain the desired position of

the sea-weed.

[Illustration]

The mounted specimen should be pinned up for a few minutes to allow the

water to drip off before placing it in the press. There is no need of

fastening the plants to the paper, as most of the sea-weeds are supplied

with a glue-like material which fastens them firmly to the paper when in

the press drying.

[Illustration: FIG. 1]

The most simple and cheap sea-weed press that I know of consists of two

large boards, as shown in Fig. 1, at AA, and on the lower board (A) are

placed layers of blotting-paper with layers of clean-washed pieces of

old sheeting. The sheeting and blotting-paper layers are for the purpose

of quickly absorbing all moisture from the sea-weeds. As soon as the

water has dripped off the mounted specimen, it is carefully laid on two

or three thicknesses of blotting-paper; on the face of the sea-weed a

piece of the muslin or sheeting is laid; over the sheeting more blotters

are placed, and on this second layer of blotters another set of

sea-weeds. In this way all the specimens are disposed of, and the top

board (AA) is placed; on this a soap box is placed, which is filled with

either sand or stones, by means of which the desired pressure is

obtained.

[Illustration: FIG. 2]

For a field press, the most simple form that I know of is shown in Fig.

2, which is made out of two pieces of three-quarter inch stuff, well

strengthened with a frame of black walnut, fastened with three screws in

each corner. After the sea-weeds are placed in position on one of the

boards, the top board is laid on, and the specimens are brought under

pressure by means of a stout strap. During the stormy days of next

winter, when you are confined to the house, you will find real pleasure

in arranging your pretty specimens in an album.

[Begun in No. 92 of HARPER'S YOUNG PEOPLE, August 2.]

Harper's Young People, August 9, 1881 An Illustrated Weekly · 第 8 / 66 题