Science from an Easy ChairLankester, E. Ray (Edwin Ray), Sir
History
Science from an Easy Chair
Lankester, E. Ray (Edwin Ray), Sir
Natural history; Science
Fine as gossamer! Town-bred folks never see it, and do not believe in
its existence; they think it is a poetical figment, like “honey-dew.”
That, too, is nevertheless a real thing—a honey-like juice poured out
by the little plant-lice or aphides. Gossamer is a very real and a most
beautiful thing. You may see it on the hill-sides in fine October
weather, when the sun is bright but low enough to illuminate the
delicate threads and reveal the “veil of silk and silver thin” spread
over Nature’s loveliness. The innumerable threads glisten, and are so
fine that they shine with iridescent colours, as do the equally delicate
soap-bubbles fabricated by men and boys, and from the same cause. When
the eye gets accustomed to them and traces them—rippling and glimmering
over acres and acres of grass-land—one feels disconcerted, almost
awestruck, by the revelation of this vast network of threads. Sometimes
the gentle currents of air break them loose from the herbage, and they
float at a higher level and envelop the puzzled intruder in an almost
invisible entanglement of fairy lines. Sometimes they become felted
together in flakes and float or rest as incredibly delicate tissue,
woven by unseen mysterious agency.
[Illustration: FIG. 47.—A young spider (four times the natural length)
raising its body upwards, whilst the four silk threads (gossamer) spun
by it float in the air, and so draw out further liquid silk from the
spider. They increase in length to three or four yards, when they float
upwards, carrying the spider with them. (After McCook.)]
When the slopes of the new golf course at Wimbledon were covered last
autumn with gossamer, my friends were asking what was its origin, some
boldly asserting that it was impossible that such a vast acreage of
threads could be produced, as others maintained, by tiny unseen spiders!
Yet that is the true history of gossamer. Hundreds of thousands of
minute spiders, young, and of a small kind, are present in grass fields
in autumn, and throw out these marvellously fine threads from their
little bodies (Fig. 47). Those who at first sight doubt this origin of
gossamer are only in accordance with their forefathers. The French
peasants call it _fil de la Vierge_; old English writers held it to be
“dew evaporated.” A great discoverer and leader of science in his time,
Robert Hook, who was elected with Nehemiah Grew as secretary of the
Royal Society in 1677, and published a wonderful illustrated book called
_Micrographia_ (see p. 173), wrote of gossamer. He was so far from
recognising its true nature that he says: “It is not unlikely that those
great white clouds which appear all the summer time may be of the same
substance.” Yet it is now a simple and certain fact of observation that
the countless threads in question are the work of minute spiders!
Public-domain text, read in full here on John Shaqi.
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