{ "id": "4f6ca3a0217232069cd1f2d2430fa90715c225ed", "text": "METEOROLOGICAL JOURNAL,\n\nKEPT BY THE ASSISTANT SECRETARY,\n\nAT THE APARTMENTS OF THE\n\nROYAL SOCIETY,\n\nBY ORDER OF\n\nTHE PRESIDENT AND COUNCIL.\n\nOBSERVANDA.\n\nHeight of the Cistern of the Barometer above the plinth at Waterloo Bridge...83 feet 2 inches.\nabove the mean level of the sea .........................97 feet.\nHeight of the receiver of the Rain Gauge above the court of Somerset House ..79 feet.\nThe External Thermometer is 2 feet higher than the Barometer Cistern.\nThe Thermometers are graduated to Fahrenheit's scale.\nThe Barometer is divided into inches and tenths.\nThe Hours of Observation are of Mean Time, the day beginning at Midnight.\nThe daily observations of the Barometer are not corrected.\nThe monthly means are corrected for capillarity and temperature by the Table contained in Mr. Baily's paper in Phil. Trans. for 1837.\n## Meteorological Journal for January and February, 1840\n\n### Observations\n\n| Date | Time | Barometer (inches) | Temperature (°F) | Wind Direction |\n|------|------|-------------------|-----------------|---------------|\n| | | | | |\n\n### Remarks\n\n- **A.M.:** Overcast—light rain and wind. P.M.: Fine—light clouds.\n- **Evening:** Fine and starlight.\n\n### Mean Barometer Corrected\n\n- **9 A.M.:** 29.577\n- **3 P.M.:** 29.660\n- **9 A.M.:** 29.879\n- **3 P.M.:** 29.861\n## Meteorological Journal for March and April, 1840\n\n### March\n\n| Time | Barometer (corrected) | Att. Ther. | Barometer (incorrected) | Att. Ther. | External Thermometers | REMARKS |\n|------------|-----------------------|------------|-------------------------|------------|----------------------|---------|\n| 9 o'clock A.M. | 30.374 | 36.2 | 30.332 | 37.0 | 32.7 | ENE |\n| | 30.430 | 38.0 | 30.366 | 37.2 | 36.0 | NE |\n| | 30.430 | 38.0 | 30.360 | 37.2 | 37.4 | NE |\n| | 30.408 | 36.9 | 30.348 | 38.9 | 35.4 | NE |\n| | 30.446 | 38.3 | 30.442 | 40.4 | 36.7 | NE |\n| | 30.564 | 38.6 | 30.544 | 40.6 | 37.2 | NE |\n| | 30.650 | 38.9 | 30.604 | 41.0 | 37.0 | NE |\n| | 30.640 | 38.8 | 30.570 | 41.4 | 37.7 | NE |\n| | 30.392 | 41.7 | 30.304 | 43.7 | 35.3 | NE |\n| | 30.276 | 45.2 | 30.298 | 45.8 | 42.5 | NE |\n| | 30.276 | 44.4 | 30.218 | 46.4 | 40.8 | NE |\n| | 30.098 | 45.3 | 30.014 | 47.9 | 45.0 | NE |\n| | 30.044 | 46.0 | 30.036 | 48.7 | 45.8 | NE |\n| | 29.974 | 45.7 | 29.840 | 47.0 | 42.4 | NE |\n| | 30.042 | 45.8 | 30.118 | 46.6 | 43.0 | NE |\n| | 30.282 | 44.8 | 30.244 | 45.2 | 40.4 | NE |\n| | 30.166 | 43.9 | 30.124 | 45.4 | 41.7 | NE |\n| | 30.190 | 44.6 | 30.230 | 46.2 | 40.0 | NE |\n| | 30.312 | 43.7 | 30.268 | 45.8 | 41.3 | NE |\n| | 30.404 | 45.8 | 30.410 | 44.4 | 37.1 | NE |\n| | 30.302 | 42.9 | 30.214 | 44.0 | 39.3 | NE |\n| | 29.992 | 43.8 | 30.030 | 43.8 | 38.0 | NE |\n| | 30.144 | 43.5 | 30.138 | 41.8 | 36.7 | NE |\n| | 30.292 | 40.5 | 30.286 | 40.0 | 37.4 | NE |\n| | 30.316 | 38.5 | 30.246 | 40.6 | 35.3 | NE |\n| | 30.116 | 39.7 | 30.028 | 40.8 | 38.7 | NE |\n| | 29.782 | 40.7 | 29.746 | 42.0 | 39.5 | NE |\n| | 29.886 | 45.3 | 29.900 | 45.2 | 46.7 | NE |\n| | 29.840 | 46.0 | 29.818 | 46.8 | 46.8 | NE |\n| MEAN | 30.245 | 41.8 | 30.214 | 43.1 | 35.3 | NE |\n\n### April\n\n| Time | Barometer (corrected) | Att. Ther. | Barometer (incorrected) | Att. Ther. | External Thermometers | REMARKS |\n|------------|-----------------------|------------|-------------------------|------------|----------------------|---------|\n| 9 o'clock A.M. | 29.664 | 46.2 | 29.606 | 47.9 | 44.4 | S |\n| | 29.720 | 45.8 | 29.754 | 49.0 | 43.6 | S |\n| | 30.024 | 46.8 | 29.996 | 49.9 | 42.3 | S |\n| | 29.960 | 45.8 | 29.924 | 46.0 | 39.8 | S |\n| | 30.044 | 45.8 | 30.004 | 48.0 | 45.2 | S |\n| | 29.798 | 51.9 | 29.634 | 50.2 | 49.3 | S |\n| | 29.552 | 50.7 | 29.628 | 49.7 | 43.4 | S |\n| | 29.995 | 47.5 | 30.028 | 46.3 | 41.0 | S |\n| | 30.256 | 45.0 | 30.202 | 46.9 | 42.3 | S |\n| | 30.400 | 48.2 | 30.344 | 48.0 | 45.4 | S |\n| | 30.250 | 50.0 | 30.134 | 48.8 | 46.7 | S |\n| | 30.050 | 48.0 | 30.004 | 49.8 | 47.4 | S |\n| | 29.912 | 49.2 | 29.836 | 52.0 | 50.8 | S |\n| | 29.808 | 52.3 | 29.780 | 52.3 | 46.9 | S |\n| | 29.936 | 54.4 | 29.928 | 54.6 | 59.2 | S |\n| | 30.108 | 60.2 | 30.086 | 56.3 | 55.7 | S |\n| | 30.188 | 57.8 | 30.116 | 54.4 | 50.5 | S |\n| | 30.040 | 60.8 | 29.955 | 53.3 | 47.0 | S |\n| | 29.922 | 49.5 | 29.846 | 52.3 | 42.8 | S |\n| | 29.892 | 56.3 | 29.850 | 54.8 | 51.2 | S |\n| | 30.074 | 56.0 | 30.076 | 56.4 | 60.7 | S |\n| | 30.224 | 55.8 | 30.266 | 57.9 | 55.5 | S |\n| | 30.348 | 59.2 | 30.304 | 59.8 | 65.2 | S |\n| | 30.290 | 67.0 | 30.212 | 61.5 | 58.8 | S |\n| | 30.174 | 66.7 | 30.120 | 62.0 | 61.8 | S |\n| | 30.312 | 67.8 | 30.284 | 63.4 | 59.5 | S |\n| | 30.356 | 63.0 | 30.300 | 64.2 | 62.5 | S |\n| | 30.300 | 68.8 | 30.240 | 63.5 | 57.5 | S |\n| | 29.298 | 67.0 | 30.260 | 64.6 | 67.0 | S |\n| | 30.324 | 65.2 | 30.272 | 64.0 | 69.2 | S |\n| MEAN | 30.077 | 55.2 | 30.037 | 54.3 | 59.5 | S |\n\n### Mean Barometer Corrected\n\n- **9 A.M.:** 30.216\n- **3 P.M.:** 30.171\n\n---\n\n**Note:** The table provides detailed meteorological data for March and April 1840, including barometric pressure, external thermometers, and remarks about weather conditions.\n| Date | Time | Barometer (A.M.) | Barometer (P.M.) | Temperature (°F) | Temperature (°C) | Remarks |\n|------|------|-----------------|-----------------|-----------------|-----------------|---------|\n| May 1 | 9 A.M. | 30.212 | 30.266 | 74.7 | 23.7 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 1 | 3 P.M. | 29.866 | 29.866 | 65.9 | 18.8 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 3 | 9 A.M. | 30.106 | 30.100 | 73.7 | 23.2 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 3 | 3 P.M. | 29.978 | 29.978 | 69.0 | 20.6 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 5 | 9 A.M. | 30.040 | 30.034 | 60.3 | 15.6 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 5 | 3 P.M. | 29.970 | 29.970 | 64.3 | 17.9 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 7 | 9 A.M. | 29.932 | 29.932 | 62.8 | 16.9 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 7 | 3 P.M. | 29.932 | 29.932 | 62.8 | 16.9 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 9 | 9 A.M. | 30.018 | 30.012 | 64.0 | 17.8 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 9 | 3 P.M. | 29.970 | 29.970 | 64.3 | 17.9 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 11 | 9 A.M. | 30.054 | 30.050 | 62.7 | 16.9 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 11 | 3 P.M. | 29.970 | 29.970 | 64.3 | 17.9 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 13 | 9 A.M. | 29.992 | 29.992 | 66.8 | 19.4 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 13 | 3 P.M. | 29.992 | 29.992 | 66.8 | 19.4 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 15 | 9 A.M. | 30.054 | 30.050 | 62.7 | 16.9 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 15 | 3 P.M. | 29.970 | 29.970 | 64.3 | 17.9 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 17 | 9 A.M. | 29.836 | 29.832 | 76.8 | 24.9 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 17 | 3 P.M. | 29.836 | 29.832 | 76.8 | 24.9 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 19 | 9 A.M. | 29.870 | 29.866 | 75.2 | 24.1 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 19 | 3 P.M. | 29.870 | 29.866 | 75.2 | 24.1 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 21 | 9 A.M. | 30.018 | 30.014 | 63.2 | 17.3 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 21 | 3 P.M. | 29.990 | 29.990 | 64.4 | 17.9 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 23 | 9 A.M. | 30.054 | 30.050 | 62.7 | 16.9 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 23 | 3 P.M. | 29.970 | 29.970 | 64.3 | 17.9 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 25 | 9 A.M. | 29.870 | 29.866 | 75.2 | 24.1 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 25 | 3 P.M. | 29.870 | 29.866 | 75.2 | 24.1 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 27 | 9 A.M. | 30.018 | 30.014 | 63.2 | 17.3 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 27 | 3 P.M. | 29.990 | 29.990 | 64.4 | 17.9 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 29 | 9 A.M. | 30.054 | 30.050 | 62.7 | 16.9 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 29 | 3 P.M. | 29.970 | 29.970 | 64.3 | 17.9 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 31 | 9 A.M. | 29.870 | 29.866 | 75.2 | 24.1 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n| May 31 | 3 P.M. | 29.870 | 29.866 | 75.2 | 24.1 | Fine and cloudless throughout the day. Evening, Fine & starlight. |\n\n---\n\n**Mean Barometer corrected:** 29.903\n\n**Sum:** 2,329", "source": "olmocr", "added": "2026-01-12", "created": "2026-01-12", "metadata": { "Source-File": "/home/jic823/projects/def-jic823/royalsociety/pdfs/108234.pdf", "olmocr-version": "0.3.4", "pdf-total-pages": 5, "total-input-tokens": 8208, "total-output-tokens": 5349, "total-fallback-pages": 0 }, "attributes": { "pdf_page_numbers": [ [ 0, 0, 1 ], [ 0, 842, 2 ], [ 842, 1362, 3 ], [ 1362, 9763, 4 ], [ 9763, 13851, 5 ] ], "primary_language": [ "en", "en", "en", "en", "en" ], "is_rotation_valid": [ true, true, true, true, true ], "rotation_correction": [ 0, 0, 0, 0, 0 ], "is_table": [ false, false, true, true, true ], "is_diagram": [ false, false, false, false, false ] }, "jstor_metadata": { "identifier": "jstor-108234", "title": "Meteorological Journal, Kept by the Assistant Secretary, at the Apartments of the Royal Society, by Order of the President and Council", "authors": null, "year": 1840, "volume": "130", "journal": "Philosophical Transactions of the Royal Society of London", "page_count": 5, "jstor_url": "https://www.jstor.org/stable/108234" } }