Nature, Volume 80Sir Norman Lockyer Macmillan Journals Limited, 1909 |
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Página 188
... record beginning inch from the margin . The record then traces its spiral groove until it is 2 inches from the centre , so the record has a breadth of a little more than 2 inches , or , say , 3 inches . The diameter at the beginning of the ...
... record beginning inch from the margin . The record then traces its spiral groove until it is 2 inches from the centre , so the record has a breadth of a little more than 2 inches , or , say , 3 inches . The diameter at the beginning of the ...
Página 189
... Record of vibrations of human voice. in an inch , or in the fraction of an inch . Thus , suppose ten marks in one inch , then the frequency would be more than 300 vibrations per second . A difti- culty arises when we find a complete ...
... Record of vibrations of human voice. in an inch , or in the fraction of an inch . Thus , suppose ten marks in one inch , then the frequency would be more than 300 vibrations per second . A difti- culty arises when we find a complete ...
Página 270
... records is secured . The Recorder registers for a day , a week , a month , or any period , automatically , being self ... record is sharp and distinct , being black on white . The charts cost only a few shillings a year . DAW DON - LAND ...
... records is secured . The Recorder registers for a day , a week , a month , or any period , automatically , being self ... record is sharp and distinct , being black on white . The charts cost only a few shillings a year . DAW DON - LAND ...
Índice
KNOWLEDGE | 1 |
Crucibles Scrap Utensils Wire Foil Residues c | xvii |
and oil immersion obje tives all in brand new condition price 25 | xxvii |
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Agriculture apparatus application April Arthur Gamgee astronomical B.Sc Botany British carbon Catalogue cent chemical Chemistry College coloured contains course Crown 8vo D.Sc deal discussed edition electric elementary engine experimental experiments Franco-British Exhibition gases Geology give given heat hydrogen illustrated important inches insects Institution instruments interesting J. J. Thomson Karl Pearson laboratory large number larva lectures London magnetic Makers March Mathematics ment Messrs method microscope Museum National Physical Laboratory observations Observatory obtained Orthoptera oxygen paper photographs physical physiology plants plates Poldhu post free practical present pressure Price produced Prof Professor published radiation radio-active radium radium bromide recent reference regard schools scientific secondary species specimens steam Street structure technical temperature text-books theory thorium tion tube University University of London velocity Victoria Land volume Zoology