Английский язык. Методические указания. Никитина С.Я - 14 стр.

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TEXT 2B

Read the text and translate it using a dictionary; do it in a written form

SUBMARINE CABLE INSULATION

Telegraphic instruments had been developed, notably by Schilling, Morse and Cooke

and Wheatstone, for the transmission of signals over land lines; and a suitable material for

insulating the conductor had already been introduced into Europe. This was gutta percha,

the gum from Malayan tree, exhibited at the Royal Society of Arts in London by Dr.

Montgomerie in 1843. The electrical and mechanical properties of gutta percha, especially

when immersed in sea water, were such that it had no rival for over 70 years as an

insulant in submarine cables. Moreover, the Gutta Percha Company had been formed in

1845-46 to exploit its use, and primitive extruders had been constructed for the production

of rods and tubes.

Before 1849, many attempts had been made to find a suitable insulant or protection

for underground and underwater cables, including glass tubes, but none of these lasted

long in the sea. In 1847 Werner Siemens used gutta percha for an underground line in

Germany, and some was laid in the Port of Kiel in 1848 for the purpose of detonating

mines. In America in the same year, Armstrong experimented with gutta percha covered

wire in the Hudson River, where Exra Cornell had previously connected Fort Lee with

New York by a rubber insulated line which worked for several months.

L E S S O N T H R E E

COMPUTER SYSTEMS

Ex. I. Practice the reading:

peripherals; keyboard; to control the functions; inexpensive; at incredibly high speed;

architecture; the arithmetic and memory processes; programming languages; suitable

binary codes; complicated actions; to specify the programme; high storage capability

Ex. II. Practice aloud the second paragraph of the text. Check your reading speed.