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Updated: June 18, 2025
W. Spring has recently communicated to the Belgian Academy the results of his investigations upon the color of water. He proved that perfectly pure water in a tube 10 meters long had a distinctly blue color, while it ought, according to Tyndall, to look red.
The Variocoupler. A variocoupler consists of a primary coil wound on the outside of a tube of insulating material and to certain turns of this taps are connected so that you can fix the wave length which your aerial system is to receive from the shortest wave; i.e., 150 meters on up by steps to the longest wave, i.e., 600 meters, which is the range of most amateur variocouplers that are sold in the open market.
Extract from the correspondence of Colonel Ardant du Picq. A letter sent from Huy, February 9, 1869, by Captain de V , a company officer in the attack division. "My company, with the 3rd, commanded by Captain D was designated to cover the battalion. "At eight or nine hundred meters from the Alma, we saw a sort of wall, crowned with white, whose use we could not understand.
The driver stammered something which almost roused the Arab to excitement. "Throw that dog aside, monsieur," he cried. "They are taking the lady to a boat. The place agreed for the meeting is yet nearly a thousand meters in front. Let us see what our horses can do." They were off before he had finished speaking, but Abdullah smiled as he rode. "Bismillah!" he muttered, "that is a fine trick.
The relux plate, subject now to eddy currents, since there was no other path for the energy to take, began to heat up rapidly. "I'm going to close the switch into the coil now," said Arcot. "Watch the meters." A relay snapped, and instantly the ammeter jumped to read 4500 amperes. The voltmeter gave a slight kick, then remained steady.
Occasionally, a door opened almost soundlessly, and a white-clad figure would check the graph tapes on the creche's meters. Orne was lingering. He became the major conversation piece at the internes' coffee breaks: "That agent who was hurt on Heleb, he's still with us. Man, they must build those guys different from the rest of us!... Yeah!
From Kolki to Sokal the Germans bombarded the Russian trenches with heavy artillery and made many local attacks, most of which were successfully repulsed. Repeated attacks in mass formation in the region of Linievka on the Stokhod, resulted also in some successes to the German troops. West of Sokal they stormed Russian positions over a length of some 3,000 meters and repulsed all counterattacks.
He is undoubtedly to be reckoned with, for he handles his machine with absolute mastery, and he is an excellent shot. But he only accepts an air fight when every chance is on his side. He flies above the German lines at altitudes between 6000 and 7000 meters, quite out of range of our anti-aircraft artillery.
The faithful lamps burned, however, and then a real silence suddenly ensued. There was no sound but the gentle trembling rhythm of the electric engines. I then gave the order: "Submerge to twenty meters!" "Both engines half steam ahead!" I was able to follow our submersion by means of the manometer.
Such meters register the consumption of the gas in the same way as the meters just mentioned, but they contain a receptacle for money. A coin, generally a quarter, is dropped into a slot leading to this receptacle, and the amount of gas sold for this sum is then permitted to pass through as it is needed.
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