*(6) Another
took this luminary with the moon and the planets, and having first
weighed them with scrupulous accuracy, probed into their depths and
found out the solidity of the substance of which they were made. But
the whole nation is, indeed, of so surprising a necromantic ability,
that not even their infants, nor their commonest cats and dogs have
any difficulty in seeing objects that do not exist at all, or that for
twenty millions of years before the birth of the nation itself had
been blotted out from the face of creation."'*(7)
* Voltaic pile.
*(2) The Electro Telegraph Printing Apparatus.
*(3) The Electro telegraph transmits intelligence instantaneously-
at least at so far as regards any distance upon the earth.
*(4) Common experiments in Natural Philosophy. If two red rays
from two luminous points be admitted into a dark chamber so as to fall
on a white surface, and differ in their length by 0.0000258 of an
inch, their intensity is doubled. So also if the difference in
length be any whole-number multiple of that fraction.
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