 | Naval art and science - 1874 - 1098 pages
...state in writing : — 12. How do yon find the index error by the sun ? 13. How is the same applied ? 14. What proof have you that those measurements or angles have been taken with tolerable accuracy ? Examination in Chart. — The applicant will be required to answer, in writing, on a sheet of paper,... | |
 | William Culley Bergen - 1875 - 182 pages
...off and mark down ; half the difference of these two readings will be the index error. 18.— It is to be added when the greater reading is off the arc,...subtracted when the greater reading is on the arc. 14. — I would add the two readings together, and divide the sum by 4 ; if the measurements be correct,... | |
 | Thomas Liddell Ainsley - Merchant marine - 1875 - 416 pages
...in writing :— и. How do you find the index error by the Sun ? 13. How is the same applied ? ц. What proof have you that those measurements or angles have been taken with tolerable accuracy ? List £. EXAMINATION IK Сплит. The applicant win be required to answer in writing, on a sheet... | |
 | James Rosser - 1877 - 174 pages
...2) 3 = diff . On greater than off, Ind. Err. — 2' 30* Off greater than on, Ind. Err. + 1' 30* Q. 14. What proof have you that those measurements or...angles have been taken with tolerable accuracy? A. The sum of the two readings, if correctly taken, divided by 4, should be the sun's semi-diameter for... | |
 | James Rosser - 1879 - 40 pages
...if the greater reading is off the arc ; to be subtracted, if the greater reading is on the arc. Q. 14. What proof have you that those measurements or...angles have been taken with tolerable accuracy ? A. The sum of the two readings, divided by 4 should be the sun's semidiameter for the da; as given in... | |
 | Reed Thomas and co, ltd - 1881 - 208 pages
...Half the difference of these two readings will be the index error. 13. How is the same applied ? It is to be added when the greater reading is off the arc,...reading is on the arc. 14. What proof have you that these measurements or — ""les have been taken with tolerable accuracy ? I would add the two ridings... | |
 | William Culley Bergen - 1881 - 242 pages
...? f 35-0 ( 13 The readings being ) off ) What is the index error, and how ) on J do you apply it ? 14. What proof have you that those measurements or angles have been Elements from the Tide Tables for the Examples, 1880. Example Standard Port. Date of Tide. Given Port.... | |
 | William Cuulley Bergen - 1881 - 186 pages
...Í 35-0 off ) What is the index error, and how 18 The readmgs being | 32.0 on J do уоц appjy u ? 14. What proof have you that those measurements or angles have been Elements from the Tide Tables for the Examples, 1880. Exampi Standard Port. Date of Tide. Given Port.... | |
 | John Newton - Nautical astronomy - 1884 - 198 pages
...index error by the sun ? 13. The readings being j ! what is the index error, and how do you apply it ? 14. What proof have you that those measurements or angles have been taken with tolerable accuracy ? ANSWERS TO THE FOREGOING QUESTIONS, numbered with the same numbers as the Questions. 1. To set the... | |
 | Industrial arts - 1891 - 610 pages
...before. Read it, and mark down as of. Half the difference of these two readings will be the index error, to be added when the greater reading is off the arc, and subtracted when the greater reading ia on the arc. To prove that these measurements have been token accurately, add the two readings together... | |
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To be added when the greater reading is off the arc, and subtracted when the greater reading is on the arc. 14. 