Science, Volume 69, Issues 1775-18001929 |
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Page 8
... cent . into mechanical power , and in still larger turbines 28 per cent . is anticipated . The first steam turbine of 4 kilowatts was used in 1885 for electric lighting ; at present , turbines of 20,000 and 30,000 kilowatts are in ...
... cent . into mechanical power , and in still larger turbines 28 per cent . is anticipated . The first steam turbine of 4 kilowatts was used in 1885 for electric lighting ; at present , turbines of 20,000 and 30,000 kilowatts are in ...
Page 19
... cent . in the atmosphere ; and helium had been detected in the sun by its spectrum long before it was found on the earth . Some of you will recall that Professor Ram- say exhibited in this country a few years later a minute bubble of ...
... cent . in the atmosphere ; and helium had been detected in the sun by its spectrum long before it was found on the earth . Some of you will recall that Professor Ram- say exhibited in this country a few years later a minute bubble of ...
Page 22
... cent . The mass or weight of the electron is only 1/1840 of that of the hydrogen atom ; it is so light that it would take 1027 of them ( 1 followed by 27 ciphers ) to weigh one gram . The sizes of atoms and of their nuclei , as measured ...
... cent . The mass or weight of the electron is only 1/1840 of that of the hydrogen atom ; it is so light that it would take 1027 of them ( 1 followed by 27 ciphers ) to weigh one gram . The sizes of atoms and of their nuclei , as measured ...
Page 24
... . Let us now consider the bearing of these results on Prout's hypothesis and on the structure of atoms . The accurate results of Aston are shown in Table I. TABLE I Per cent . 81 may well be this 24 SCIENCE [ VOL . LXIX , No. 1776.
... . Let us now consider the bearing of these results on Prout's hypothesis and on the structure of atoms . The accurate results of Aston are shown in Table I. TABLE I Per cent . 81 may well be this 24 SCIENCE [ VOL . LXIX , No. 1776.
Page 25
TABLE I Per cent . 81 may well be this decrease in energy which makes the mass of the helium nucleus three - quarters of a per cent . less than that of four hydrogen nuclei . The recent very exact measurements of Aston show that a ...
TABLE I Per cent . 81 may well be this decrease in energy which makes the mass of the helium nucleus three - quarters of a per cent . less than that of four hydrogen nuclei . The recent very exact measurements of Aston show that a ...
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