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Updated: May 27, 2025
Something strange in their circumstances made itself felt by them; they were more sensible of the grim Doctor's uncouthness, his strange, reprehensible habits, his dark, mysterious life, in looking at these things, and the spiders, and the graveyard, and their insulation from the world, through the crystal medium of this stranger's character.
Ground wires were good enough, in both instances, for my wires were protected by an insulation of my own invention which was perfect. My men had orders to strike across country, avoiding roads, and establishing connection with any considerable towns whose lights betrayed their presence, and leaving experts in charge.
The insulation on three of the spark plugs had cracked and it was not before he had done a lot of rummaging around that the boy found spare ones stored in a locker. By this time the engineer, who seemed a decent enough fellow, and told Frank his name was Dick Richards, had recovered and helped the boy fit the new sparkers to the motor.
It was of the slotted drum type, he at once perceived, built up of laminations of soft steel painted to break up eddy currents, and as he tested the soft amber mica insulation about the commutators of hard-rolled copper, he knew that the defective generator could be repaired in three-quarters of an hour.
The depth of the Irish Channel in the narrower parts is only 360 feet, and the English Channel between Dover and Calais less than 200, and rarely anywhere more than 300 feet; so that vertical movements of slight amount compared to some of those previously considered, with the aid of denuding operations or the waste of sea cliffs, and the scouring out of the channel, might in time effect the insulation of the lands above alluded to.
It is one merit of the low-temperature work, I repeat, to have called attention to the possibilities of heat insulation in application to "the useful purposes of life."
"In the latter part of March Professor Morse gave me the order to put the wires on poles, and the question at once arose as to the mode of fastening the wires to the poles, and the insulation of them at the point of fastening. I submitted a plan to the Professor which I was confident would be successful as an insulating medium, and which was easily available then and inexpensive. Mr.
We miss much through our want of separation from the world, and through our deficiency in insulation, or, which is the same word, in isolation. If we go into a science laboratory and examine the great brass machines for holding electrical charges, we find that they are all mounted on glass feet.
As early as 1842, Masson and Bréguet constructed an induction coil by means of which minute sparks could be obtained from the secondary, in vacuo. In 1851, Ruhmkorff constructed an induction coil so greatly improved, by the careful insulation of its secondary circuit, that he could obtain from it torrents of long sparks in ordinary air.
The progress of insulation here is obvious and incontrovertible, and why may not larger islands, at a greater distance, have been formed in the revolution of ages by the same accidents?
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