For purposes of insulation the wires were neatly covered with cotton-yarn and then saturated in a bath of hot gum-shellac, but this treatment proved defective in insulating properties, for when ten miles of line had been completed the wires were found to be wholly useless for electric conduction.

No mode had been devised for the treatment of india-rubber to make it available for purposes of insulation, and gutta-percha was wholly unknown as an article of use or commerce in this country.

No method of insulation had yet been devised that would permit the operation of an electric conductor under water, and it was doubted whether a wire could be maintained for a span sufficient to cross the river overhead.

A certain degree, and a very considerable degree of insulation is necessary, that individual life and mental equanimity may go on.

But there may be a degree of insulation which is unbecoming a member of the human family.

The accumulated error at the end of this time did not exceed 0s'3.Some difficulty was at first experienced with the Thomson Electrometer, which was traced to want of insulation.

But like a child realising that his parents can't save him from the bully at school, Americans were forced to consider that our leaders, our weapons and our wealth offer only so much insulation from a big bad world.

Cornell's plan for insulation endorsed by Professor Henry.

Professor Fisher was detailed to superintend the manufacture of the wire, its insulation and its insertion in the lead tubes, and Professor Gale's scientific knowledge was to be placed at the disposal of the patentees

" Cornell having thus cleverly cut the Gordian knot, it was decided to string wires on poles, and Cornell himself thus describes the solution of the insulation problem: "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.

The other peculiarity we would name about our English country-houses is, that they do not insulate their residents from the society and business of active life; which insulation is probably a cause, why so many proprietors in other countries pass their whole time in the metropolis or larger towns.

It should be extraordinarily warm and comfortable, for in addition to this double coating of insulation, dry seaweed in quilted sacking, I propose to stack the pony fodder all around it.

Meanwhile the hut proceeds; altogether there are four layers of boarding to go on, two of which are nearing completion; it will be some time before the rest and the insulation is on.

The sides have double boarding inside and outside the frames, with a layer of our excellent quilted seaweed insulation between each pair of boardings.

To add to the wall insulation the south and east sides of the hut are piled high with compressed forage bales, whilst the north side is being prepared as a winter stable for the ponies.

Insulation inside and out is the subject we are now attacking.

Although it is possible to insulate the rails in a satisfactory manner in the case of an elevated road, the conditions of insulation are not very favorable where the railway is to be constructed on a level with the surface.

Hand book of insul wool insulation.

At a distance where the current has become weak because of the resistance of the wire and losses due to faulty insulation, it will still operate a delicate electro-magnet with a very light armature so arranged as to open and close a local circuit provided with suitable batteries.

The insulation was not adequate, and the line could not be operated to the first relay station.

His insulation was tarred hemp and India rubber.

The strain of this high voltage had a very serious effect upon the insulation.

It was found that a piece of iron wire had in some way pierced the cable so that the insulation was ruined.

Many of the wires were rusted and the insulation was poor.

They investigated and found that another telegraph wire, strung along the same poles, but at the usual distance and with the usual insulation, was being used for a test of Edison's musical telephone.