The British Encyclopedia: Or, Dictionary of Arts and Sciences. Comprising an Accurate and Popular View of the Present Improved State of Human Knowledge, Volume 1Longman, Hurst, Rees, and Orme, 1809 - Natural history |
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... person speaks at B in the trumpet , the whole force of his voice is spent upon the air contained in the tube , which will be agitated through its whole length , and , by various reflections from the side of the tube to the axis , the ...
... person speaks at B in the trumpet , the whole force of his voice is spent upon the air contained in the tube , which will be agitated through its whole length , and , by various reflections from the side of the tube to the axis , the ...
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... person towards whom it is fired , than to one placed in a contrary direction . It must , says Dr. Young , have occurred to every one's observation , that a sound , such as that of a mill , or a fall of water , has appeared much louder ...
... person towards whom it is fired , than to one placed in a contrary direction . It must , says Dr. Young , have occurred to every one's observation , that a sound , such as that of a mill , or a fall of water , has appeared much louder ...
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... person often hears the echo of his stand at least 63 or 64 feet from the reflect- own voice ; but for this purpose he should ing obstacle , according to what has been said before . If a bell , a , fig . 5 , be struck , and the un ...
... person often hears the echo of his stand at least 63 or 64 feet from the reflect- own voice ; but for this purpose he should ing obstacle , according to what has been said before . If a bell , a , fig . 5 , be struck , and the un ...
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... person , in different situations , or when different objects are alternately placed in the room , that sound may be heard louder or weaker , and more or less dis- tinct . Hence it is , that blind persons , who are under the necessity of ...
... person , in different situations , or when different objects are alternately placed in the room , that sound may be heard louder or weaker , and more or less dis- tinct . Hence it is , that blind persons , who are under the necessity of ...
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... person properly instructed be placed behind the partition , near the mirror ; any one may now whisper into the ear of the image , with the assurance of being an- swered . The deception is managed by giving a signal to the person behind ...
... person properly instructed be placed behind the partition , near the mirror ; any one may now whisper into the ear of the image , with the assurance of being an- swered . The deception is managed by giving a signal to the person behind ...
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acid alumina ammonia anatomy ancient angle animal aphides appear arch architrave artery astronomy bees benzoic acid bill bird-lime birds blood body bones botany branches called calyx cartilage cavity chyle class and order class of plants colour columns common consists contained cornice corolla covered cupel cymatium diameter distance divided earth entablature equal equation feet figure flowers fluid four genus head heat height hive inches insects Ionic order kind land leaves length less manner membrane ment mercury Monogynia class moon motion multiplied muscles native natural nerves nitric acid oblong observed orbit papillæ pass person petals pilasters potash produce proportion quantity right ascension Roman root round roundish seeds shew side soil sometimes species specific gravity square stars substance surface tained term tion tree tube upper vegetable vessels whole