August 1902AUGUST 1902.
AUGUST 1902.
Thecoating of acorn barnacles with which the higher surfaces of the Rock and also the base of the tower are whitened in summer is fast disappearing before the ravages of that ruthless destroyer the white whelk. Seen from the balcony, this encrustation resembles a lime-hauled wall, and presents a suitable background for the observation of moving objects under water. These barnacles are frequently mistaken by the casual observer for young limpets, whereas, unlike the limpet, which moves freely from place to place in quest of vegetable diet, the moment the young barnacle settles to erect his limey habitation, he possesses a fixity of tenure which terminates only with his existence. An outer wall, with razor edges, surrounds a hollow cone, his private apartment, and probably guards his four-leaved door from injury. This opening, through which all business with the outer world is transacted, is scarcely discernible when above water; but immediately the tide covers it, the hollow cone is seen to fall apart in four vertical sections, a bunch of fingers is thrust forth and rhythmic clutches made at invisible food. How little they resemble their relatives who swing by their pendulous stalks from ships’ bottoms or submerged wreckage, and see the world without any exertion of their own. The ancients firmly believed that from these animals certain birds were produced, probably from the resemblance of their shelly casement to the beak of a bird, and the bird known as the barnacle-goose owes his name to this belief. Even to-day there are persons who solemnly declare that the Northern Diver is so evolved.
Another fallacy common amongst fishing communities on the West Coast is the attributing the destructive effects of theteredo navalis, or ship-worm, to the innocent barnacle, whose only fault is the resistance their multitudes offer to a ship’s progress through the water. A log of wood which has been adrift at sea for a lengthened period will generally be found to have its surface clustered with pendulous barnacles. The removal of these disclose minute pin-holes on the surface, which, in the interior, assume the diameter of a man’s little finger, and permeate the log from end to end like a honeycomb. Each little tunnel is smoothly enamelled with a deposit of lime by this indefatigable borer, theteredo. Though boring parallel with his neighbour, the thickness of paper only separating them, they never, by any chance, encroach on each other’s bore. Their tracks are seen to abruptly diverge when all but into that of their neighbour, so that they are evidently cognisant of each other’s proximity, an interesting fact also apparent in rats on board wooden vessels, who, though they will gnaw their way through any woodwork, instinctively refrain from suicidal attempts on the outer skin of the ship.
On the memorable 9th we had a bird’s-eye view of the Coronation celebrations in Arbroath. With the aid of our telescope the crowds on the Common were clearly visible, the ladies in white dresses being most conspicuous. The flash of the guns firing the royal salute was seen fifty-five seconds before the report reached us. In the afternoon the sports in the Victoria Park occupied our attention, and the white-clad competitors in the high jump could be seen taking their preliminary run and rising over the obstacle. Parties straying on the beach had only their heads visible, and as they neared the margin appeared to vanish under water. The progress of the bonfire on the Common at night was also watched, and the moving figures could be plainly seen silhouetted in the glare. Probably but few noticed our attempt to celebrate the occasion. Two strings of flags from the balcony to the rocks fluttered gaily in the breeze, while the balcony railing was similarly decked. Amongst those suspended from the rail was a flag of peculiar interest, namely, one which had been sewn by Miss Stevenson, a sister of the builder, Robert Stevenson, almost a hundred years ago. The central subject depicted on the white ground is the Bell Rock Lighthouse; on the right, the patron saint of Scotland with his cross; while a ship under full sail occupies the left, the whole bordered with a deep edging of red. The figures are extremely well executed, and the colouring to the flesh tints remarkable. The flag was presented to the Rock by Miss Stevenson to be used as a table draping during divine service.
Several white butterflies and moths innumerable were seen passing here this month. It seems these insects have their migratory periods as well as birds, and at stations favourable for their observation they appeared, to quote from a writer in a recent number of “Chambers’s,” “as a dense snowstorm driven by a light breeze, and this not for one day only, but for many in succession. Whereas birds come and go with clockwork regularity, the immigration of butterflies is uncertain, and of all those which survive the perils of the deep no single one returns.”