Miscellaneous Documents: 30th Congress, 1st Session - 49th Congress, 1st Session, Volume 4 |
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Page 15
... Magnetic and Meteorological Observations made at the Girard College Observatory , Philadelphia , in 1840 - '45 . Part II . Investigation of the Solar - Diurnal Variation of the Magnetic Declination and its Annual Inequality . By A. D. ...
... Magnetic and Meteorological Observations made at the Girard College Observatory , Philadelphia , in 1840 - '45 . Part II . Investigation of the Solar - Diurnal Variation of the Magnetic Declination and its Annual Inequality . By A. D. ...
Page 16
... series of reductions of the magnetic observations made from 1840 to 1845 , inclusive , at Girard College , Philadelphia , by Professor Bache . The first two of the papers of this series related 16 REPORT OF THE SECRETARY .
... series of reductions of the magnetic observations made from 1840 to 1845 , inclusive , at Girard College , Philadelphia , by Professor Bache . The first two of the papers of this series related 16 REPORT OF THE SECRETARY .
Page 17
... magnetic force . The sixth relates to the lunar influence on the horizontal magnetic force . A particular account has been given of the result of all these inves- tigations , which tend fully to corroborate the conclusions arrived at ...
... magnetic force . The sixth relates to the lunar influence on the horizontal magnetic force . A particular account has been given of the result of all these inves- tigations , which tend fully to corroborate the conclusions arrived at ...
Page 18
... magnetic bar suspended by an untwisted thread , so as to be horizontal , gives the horizontal component of the force of the earth , while the vibrations of a similar bar placed in the plane of the dip , and poised horizontally like a ...
... magnetic bar suspended by an untwisted thread , so as to be horizontal , gives the horizontal component of the force of the earth , while the vibrations of a similar bar placed in the plane of the dip , and poised horizontally like a ...
Page 62
... Magnetic Survey of Pennsylvania and parts of adjacent States in 1840 and 1841 , with some additional Records and Results of 1834 , 1835 , 1843 , and 1862 , and a map . By A. D. Bache , LL.D. , F. R. S. , Member of Corresponding Academy ...
... Magnetic Survey of Pennsylvania and parts of adjacent States in 1840 and 1841 , with some additional Records and Results of 1834 , 1835 , 1843 , and 1862 , and a map . By A. D. Bache , LL.D. , F. R. S. , Member of Corresponding Academy ...
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