206
THE ESSEX NATURALIST.
EXPLANATION OF THE PLATES.
Plate N. Fig. i. Polymicrodon polydesmoides (Leach). A tent just begun.
Fig. 2. ,, ,, The completed tent.
The animal is awaiting
moulting. Aug. 20.
Fig. 3. ,, „ Beginning of the moult.
Aug. 22, 11.4.5 a.m.
Fig. 4. ,, ,, The moult completed,
the cast skin alongside.
Aug. 22, 3.15 p.m.
Fig. 5. ,, ,, The cast skin has disap-
peared, having been
eaten. Aug. 24, 7 p.m.
Fig. 6. ,, ,, The tent in side view.
Aug. 24, 7 p.m.
(Figs. 2 to 6 represent the same tent.)
Plate XI. Fig 1. Polymicrodon polydesmoides (Leach). The tent being
eaten. Aug. 24. 6 p.m.
Fig. 2. ,, ,, The same at 0.40 p.m.
Figs. 3 & 4. ,, ,, Mews of the cluster of
eggs with silken cover-
ing. Nov. 28.
Fig. 5. ,, ,, Male.
(All the figures are x 2 diameters.)
FARADAY AND HIS INFLUENCE ON OUR
EVERYDAY LIFE.
By WILLIAM BRIDGER, B.Sc., M.I.E.E.
(Read 28th November, 1931.)
Introduction.
THE man in the street tends to regard the devotee of Natural
Science as a labour-wasting trifler, rather removed from
the realm of practical utility. History lies behind this attitude,
and a brief review may explain the popular ideas about non-
industrial scientists.
In the 16th century intellectuals began actively to investi-
gate the mysteries of Nature. One of the first fruits appeared in
1600—De Magnete—brought forth by Dr. Wm. Gilbert, of Col-
chester, the Father of Magnetic Science. The antiquaries of
Electrical Engineering hold him in high esteem. Dryden, the
poet, pays tribute with "Gilbert shall live, till lodestones cease
to draw." Following this, in Biology, came Harvey's great