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Updated: June 12, 2025
When the transmitting pattern strip, P, is caused to pass between the roller, T, and the stylus, t, electric impulses will be transmitted upon the line, L, from the positive pole of the battery, E, which will traverse the main line, L, the two branch lines, l, and ll, and their included resistances, and also the receiving instrument, M. The greater portion of this current will, however, on account of the less resistance offered, traverse the receiving instrument, M, and the auxilary battery, E'. The current from the last-named battery will thus be neutralized and overpowered, and the excess of current from the main battery, E, will act upon the chemically prepared paper and record in the form of dots and dashes or like arbitrary characters the impulses which are transmitted.
"The subdivision of prakritic matter until we reach etheric atoms chemically united to make the physical unit" is the correct definition of an atom. The prakritic physical atom has length, breadth and thickness.
The new substances were proved to be compounds chemically very similar to salts of barium. Their compositions were determined on the supposition that they were salts of an unknown metal closely allied to barium. Because of the great radio-activity of the compounds, the hypothetical metal of them was named Radium. At a later time, radium was isolated by Madame Curie.
Caffeine and theobromine, the narcotic principles of coffee and tea, are xanthines; and so is the nicotine contained in tobacco. Peas, beans, lentils, mushrooms and peanuts, besides being very rich in uric acid-producing proteins, carry also large percentages of xanthines, which are chemically almost identical with uric acid and have a similar effect upon the organism and its functions.
The implication is that, while the matter composing the Solar System has progressed physically from that relatively-homogeneous state which it had as a nebula to that relatively-heterogeneous state presented by Sun, planets, and satellites, it has also progressed chemically, from the relatively-homogeneous state in which it was composed of one or a few types of matter, to that relatively-heterogeneous state in which it is composed of many types of matter very diverse in their properties.
Luckily, most of the work was done and Dane had given a last searching inspection before signing the rigger's book and reporting to his captain. The air-conditioned interior of the Queen comforted him as he climbed to his quarters. Ship air was flat, chemically pure but unappetizing stuff. Today it was a relief to breathe. Dane went on to the bather.
To isolate a radioactive substance, the first thing is to measure the activity of a certain compound suspected of containing this substance, and this compound is chemically separated.
Examined chemically, it proves to be composed almost wholly of carbonate of lime; and if you make a section of it, in the same way as that of the piece of chalk was made, and view it with the microscope, it presents innumerable Globigerinæ, embedded in a granular matrix. Thus this deep-sea mud is substantially chalk.
Occasional physical tests, accompanied with chemical analysis of irons used for chilling, were advocated; and the author was of opinion it would be well whenever a chilled casting had enjoyed a good reputation for standing up to its work, that when it was retired from work some portions of it should be chemically analyzed so as to obtain clews to compositions of excellence.
It is bulky and of an awkward shape, it is heavy, it is completely incombustible, it is chemically unstable, and its decomposition yields great volumes of highly odorous gases, and it nevertheless contains identifiable structures of the highest degree of permanence. It is extremely difficult to preserve unchanged, and it is still more difficult completely to destroy.
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