Essay AnnualErich Albert Walter Scott, Foresman and Company, 1940 Vol. for 1933 includes "A bibliography of outstanding American essays published in American periodicals," pp. 367-372. |
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Halaman 136
... rays . In the one field new materials and in the other new devices are being produced in increasing num- bers , helping to make imminent new miracles of medicine . The X - ray and the microscope have extended the vision of the medical ...
... rays . In the one field new materials and in the other new devices are being produced in increasing num- bers , helping to make imminent new miracles of medicine . The X - ray and the microscope have extended the vision of the medical ...
Halaman 137
... X - rays and radium , which have saved thousands of lives in the few years they have been available , are two early examples . To - day dis- coveries are being made which promise to be even more fruitful in their turn . The X - ray was ...
... X - rays and radium , which have saved thousands of lives in the few years they have been available , are two early examples . To - day dis- coveries are being made which promise to be even more fruitful in their turn . The X - ray was ...
Halaman 138
Erich Albert Walter. which lies deeper may be better attacked by rays from tubes which operate on much higher voltages . The principal rays from radium are equivalent to those from an X - ray tube running on only two million volts ...
Erich Albert Walter. which lies deeper may be better attacked by rays from tubes which operate on much higher voltages . The principal rays from radium are equivalent to those from an X - ray tube running on only two million volts ...
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The Critical World | 1 |
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