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Updated: June 23, 2025
In the first place, the medulla contains numerous nerve cells, belonging to the vegetative, also called the sympathetic nervous system. But these nerve cells are merely minor notes of the symphony. The motif is settled by a majority of large, granular cells, which stain a distinctive yellowish-brown when the gland is fixed in a solution of bichromate of potash.
It appears to us to be specially destined to become a rival to the bichromate of potash pile for actuating electric motors applied to the directing of balloons. Revue Industrielle. The light emitted from burning gases which burn with bright flame is known to be a secondary phenomenon.
This was 92 feet in length and 32 feet in greatest diameter, with a cubic capacity of 37,500 feet, and the fabric used was varnished cambric. The car was made of bamboo rods, and in addition to its crew of three, it carried a Siemens dynamo, with 24 bichromate cells, each of which weighed 17 lbs.
The greatest height attained in this ascent is estimated at 28,000 feet." It was in 1884 that the brothers Tissandier commenced experiments with a screw-propelled air ship resembling in shape those constructed by Giffard and Dupuy de Lome, but smaller, measuring only 91 feet by 30 feet, and operated by an electric motor placed in circuit with a powerful battery of bichromate cells.
Next, without a word, he poured just a drop of strong sulphuric acid on the crystals. There was not a change in them. Quickly he reached up into the rack and took down a bottle labeled "Potassium Bichromate." "Let us see what an oxidizing agent will do," he remarked. As he gently added the bichromate, there came a most marvelous, kaleidoscopic change.
There will not be any perceptible colouring for half-an-hour or so, but further exposure to good or strong sunlight will gradually bring about a change from the slight orange tint to the dull light brown approaching that produced by the slow secret process adopted by "Old Father Time." It must be kept in mind that bichromate of potash is a poison.
For the steam engines of Henry Giffard, and the muscular force of Dupuy de Lome, electric motors had gradually been substituted. The batteries of bichromate of potassium of the Tissandier brothers had given a speed of four yards a second. The dynamo-electric machines of Captain Krebs and Renard had developed a force of twelve horsepower and yielded a speed of six and a half yards per second.
It has the property of throwing up the threads of the pine and the nutmeggy parts of the maple without impairing seriously the clearness of the grain under the varnish. The preparation of the solution is as follows some pieces of bichromate of potash can be put into any ordinary bottle of a convenient size and water poured on to them.
Muller presently discovered that bichromate of potassium in solution makes the best of fluids for the preliminary preservation and hardening of the tissues. Stilling, in 1842, perfected the method by introducing the custom of cutting a series of consecutive sections of the same tissue, in order to trace nerve tracts and establish spacial relations.
M. Trouve originally employed Plante's secondary battery, but afterward reverted to a bichromate battery of his own invention. In all the primary batteries hitherto applied with advantage, zinc has been used as the acting material.
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