 ... that for the ordinary necessities of lighthouse illumination, mineral oil is the most suitable and economical illuminant, and that for salient headlands, important landfalls, and places where a very powerful light is required, electricity offers the...  Science - Pagina 311geredigeerd door - 1886Volledige weergave - Over dit boek
 | Royal Society of Edinburgh - 1886 - 1098 pagina’s
...Douglass patent gas burners are much more efficient and economical than the "Wigham gas burners." 5. " That for the ordinary necessities of lighthouse illumination,...required, electricity offers the greatest advantages." There were employed during these experiments a variety of forms of photometer, but the most important... | |
 | Royal Society of Edinburgh - 1886 - 1120 pagina’s
...Douglass patent gas burners are much more efficient and economical than the Wigham gas burners." 5. " That for the ordinary necessities of lighthouse illumination,...required, electricity offers the greatest advantages." There were employed during these experiments a variety of forms of photometer, but the most important... | |
 | 1885 - 358 pagina’s
...the Douglass patent gasburners are much more efficient and economical than the Wigham gasburners. 5. That for the ordinary necessities of lighthouse illumination...required, electricity offers the greatest advantages. Thus is concluded a very important inquiry, which it may be hoped will set the question at rest for... | |
 | 1886 - 850 pagina’s
...practical importance to navigation. The final conclusion of the Examining Committee was : ' That for ordinary necessities of lighthouse illumination, mineral...headlands, important landfalls, and places where a powerful light is required, electricity offers the greatest advantages.' It may be noted as a matter... | |
 | Sir Norman Lockyer - 1886 - 666 pagina’s
...greatest penetrative power in fog ; " that for all practical purposes the gas and oil were equal; and " that for the ordinary necessities of lighthouse illumination,...required, electricity offers the greatest advantages." GEOGRAPHICAL EDUCATION 'T'HE Council of the Royal Geographical Society have •*• been making a determined... | |
 | 1886 - 982 pagina’s
...committee are that for ordinary necessities of lighthouse illumination mineral oil is the most simple and economical illuminant ; and that for salient headlands,...required, electricity offers the greatest advantages. Heredity and Education. — " Heredity and Education ; their Relation to Each Other and to the Human... | |
 | 1885 - 784 pagina’s
...investigations, to establish the fact that "for the ordinary necessities of lighthouse illumination oil is the most suitable and economical illuminant, and that for salient headlands, important land falls, ami places where a very powerful light is required, electricity offers the greatest advantages."... | |
 | John Michels (Journalist) - 1886 - 614 pagina’s
...experiments have also shown clearly that the lights from gas and oil are very much alike in illumming-power : indeed, under some conditions, the oil-flames seem...Journal of the Society of arts. The latter forge all the daha ('native hatchets') used by themselves and their neighbors in the Hotha valley ; and they annually... | |
 | John Michels (Journalist) - 1886 - 638 pagina’s
...conditions, the oil-flames seem to be rather the better. They have also shown that the oil-lights can he superposed with the same facility as the gaslights....Journal of the Society of arts. The latter forge all the dahs ( ' native hatchets ' ) used by themselves and their neighbors in the Hotha valley ; and they... | |
 | 1886 - 540 pagina’s
...greatest penetrative power in fog " ; that for all practical purposes the gas and oil were equal ; and " that for the ordinary necessities of lighthouse illumination,...required, electricity offers the greatest advantages." GERMAN STEEL RAILS. — The Rhine Steel Works Company has obtained an order for 1,500 tons of steel... | |
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