The Year-book of Facts in Science and ArtSimpkin, Marshall, and Company, 1876 - Science |
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acetic acid action alcohol alizarin ammonia amount appears atmosphere battery Beeton's boiling British carbon carbonic acid carboniferous cave cent chemical chloric acid chloride coal colour containing copper depth diameter dissolved distance effect electric engine experiments feet filter flame gallium glass grms ground heat hydrochloric acid hydrogen inches increase iodine iron islands length light lime liquid magnetic matter means ment metal miles mixed mixture Montlhéry motion nearly nitric acid observed obtained ordinary oxide oxygen passed phosphoric acid plants plates platinum pole portion potash potassium precipitate produced purpurin pyrites quantity railway reed rocks salt sesquioxide side Silurian solar soluble solution sound species spectrum steel stone stream string sulphate sulphuric acid sun's surface tain temperature thallium thickness tion tons tube ture vapour vessel vibrations Villejuif weight whilst wind wire zinc
Popular passages
Page 11 - Adding a third square, ef, the reflected sound was still further augmented, every accession to the echo being accompanied by a corresponding withdrawal of the vibrations from /' and a consequent stilling of that flame. With thinner calico or cambric, it would require a greater number of layers to intercept the entire sound ; hence with such cambric we should have echoes returned from a greater distance, and therefore of greater duration. Eight layers of the calico employed in these experiments, stretched...
Page 107 - ... much, as it would sink to the bottom and injure the flowers. The vessel with its cover on, and the gauze beneath it, is then turned upside down, and the bottom being removed, the flowers to be operated upon are carefully placed on the gauze and the sand gently poured in, so as to cover the flowers entirely, the leaves being thus prevented from touching each other.
Page 91 - Now, while carbolic acid and other anti-ferments are azymotic, or completely arrest or prevent fermentations of the first kind, they are powerless with the chemical processes. Salicylic acid is said to be more effective with the vital ferments, and equally effective with the chemical. Fourthly, in quantities said to be thoroughly effective, it is entirely odourless and tasteless, and harmless, whilst it has no poisonous effect in any reasonable quantity.
Page 91 - Fourthly, in quantities said to be thoroughly effective, it is entirely odorless and tasteless and harmless, whilst it has no poisonous effect in any reasonable quantity. It prevents or arrests the souring of worts, washes and beers of the brewers, and prevents or arrests the putrefactive agencies which are so troublesome and destructive to the glue manufacturers ; and these and similar trades have thus far seemed to be its principal consumers. Separate portions of fresh milk set aside to become...
Page 10 - I think we may justly consider the sound which he called "instantaneous " as one whose aerial echoes did not differentiate themselves from the direct sound by any noticeable fall of intensity, and which rapidly died into silence. Turning now to the observations at Montlhery, we are struck by the extraordinary duration of the echoes heard at that station. At the South Foreland the charge habitually fired was equal to the largest of those employed by the French philosophers ; but on no occasion did...
Page 9 - For supposing the clouds to be only a mile distant, the sound and its echo would have been separated by an interval of nearly ten seconds. But there is no mention of any interval ; and had such existed, surely the word " followed," instead of " accompanied," would have been the one employed.
Page 34 - U-tube connected with a glass bulb within the air-bath. By means of a pressure-tap which closes an open L of the connecting tube, the air within the bulb may be confined as soon as the bath reaches the required temperature. After this a very slight increase of temperature raises the mercury column sufficiently to close the electric circuit, and then the current shuts the cock which regulates the supply of gas to the burner under the bath. The chief advantage and the novelty of the apparatus is to...