![[texts]](/images/mediatype_texts.gif) | Extract of a Letter from Captain Basil Hall, R.N. F.R.S. to William Hyde Wollaston, M.D. V.P.R.S. Containing Observations of a Comet Seen at Valparaiso - Hall, B. Extract of a Letter from Captain Basil Hall, R.N. F.R.S. to William Hyde Wollaston, M.D. V.P.R.S. Containing Observations of a Comet Seen at Valparaiso. Hall, B Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843). 1815-01-01. 2:158–158 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 10 |  |
![[texts]](/images/mediatype_texts.gif) | Observation of an Extraordinary Height of the Barometer, December 21. 1721. By Mr. George Graham, Watchmaker, F. R. S. - Graham, G. Observation of an Extraordinary Height of the Barometer, December 21. 1721. By Mr. George Graham, Watchmaker, F. R. S Graham, G Philosophical Transactions (1683-1775). 1753-01-01. 31:222–222 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | An Account of an Eclipse of the Moon, 22d November 1760, Observed in Surrey-Street in the Strand, London; By James Short, M. A. F. R. S. - Short, J. An Account of an Eclipse of the Moon, 22d November 1760, Observed in Surrey-Street in the Strand, London; By James Short, M. A. F. R. S Short, J Philosophical Transactions (1683-1775). 1759-01-01. 51:936–936 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 7 |  |
![[texts]](/images/mediatype_texts.gif) | On Fossil Remains of Echidna Ramsayi (Ow.). Part II. - Owen, R. On Fossil Remains of Echidna Ramsayi (Ow.). Part II. Owen, R Proceedings of the Royal Society of London (1854-1905). 1887-01-01. 42:390–390 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 7 |  |
![[texts]](/images/mediatype_texts.gif) | Extract from a Letter Addressed by Chas. Babbage, Esq., F.R.S., to Dr. Bache, of Washington, May 10, 1852 - Babbage, C. Extract from a Letter Addressed by Chas. Babbage, Esq., F.R.S., to Dr. Bache, of Washington, May 10, 1852. Babbage, C Proceedings of the Royal Society of London (1854-1905). 1868-01-01. 17:133–133 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 8 |  |
![[texts]](/images/mediatype_texts.gif) | An Investigation of the Colour Vision of 527 Students by the Rayleigh Test - Houston, R. An Investigation of the Colour Vision of 527 Students by the Rayleigh Test. Houston, R. Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character (1905-1934). 1922-12-01. 94 (659):203–203 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 8 |  |
![[texts]](/images/mediatype_texts.gif) | Account of Experiments on Torsion and Flexure for the Determination of Rigidities. - Everett, J. Account of Experiments on Torsion and Flexure for the Determination of Rigidities. Everett, J Proceedings of the Royal Society of London (1854-1905). 1867-01-01. 16:248–248 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | An Investigation of the Powers of the Simple Supporters of Combustion to Destroy the Virulence of Morbid Poisons, and of the Poisonous Gases, with a View to Ascertain the Possibility of Controuling the Extension of Contagious or Epidemic Diseases. - Browne, E. An Investigation of the Powers of the Simple Supporters of Combustion to Destroy the Virulence of Morbid Poisons, and of the Poisonous Gases, with a View to Ascertain the Possibility of Controuling the Extension of Contagious or Epidemic Diseases. Browne, E Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843). 1830-01-01. 3:134–134 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | On the Thermal Effects of Compressing Fluids. - Joule, J. On the Thermal Effects of Compressing Fluids. Joule, J Proceedings of the Royal Society of London (1854-1905). 1857-01-01. 9:496–496 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | The Extract of a Letter from Lisle in Flanders, May 25. N.S. 1686. Giving an Account of an Unusual Storm of Hail which Fell There - Lisle, . The Extract of a Letter from Lisle in Flanders, May 25. N.S. 1686. Giving an Account of an Unusual Storm of Hail which Fell There. Lisle, Philosophical Transactions (1683-1775). 1753-01-01. 17:858–858 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | On the Late Extraordinary Depression of the Barometer. - Howard, L. On the Late Extraordinary Depression of the Barometer. Howard, L Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843). 1815-01-01. 2:163–163 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 5 |  |
![[texts]](/images/mediatype_texts.gif) | Extract of a Letter Written by Signior Borelli, about the Price of His Telescopes: Communicated to Sir Jonas Moore - Borelli, S. Extract of a Letter Written by Signior Borelli, about the Price of His Telescopes: Communicated to Sir Jonas Moore. Borelli, S Philosophical Transactions (1665-1678). 1753-01-01. 12:1005–1005 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | Polytremacis and the Ancestry of the Helioporidae. - Gregory, J. Polytremacis and the Ancestry of the Helioporidae. Gregory, J Proceedings of the Royal Society of London (1854-1905). 1899-01-01. 66:19–19 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 7 |  |
![[texts]](/images/mediatype_texts.gif) | Description of a Newly-Excluded Young of the Ornithorhynchus paradoxus. - Owen, R. Description of a Newly-Excluded Young of the Ornithorhynchus paradoxus. Owen, R Proceedings of the Royal Society of London (1854-1905). 1887-01-01. 42:391–391 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 8 |  |
![[texts]](/images/mediatype_texts.gif) | Experimental Researches on the Elliptic Polarization of Light. - Powell, B. Experimental Researches on the Elliptic Polarization of Light. Powell, B Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843). 1837-01-01. 4:394–394 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 8 |  |
![[texts]](/images/mediatype_texts.gif) | On the Respiration of the Leaves of Plants. - Pepys, W. On the Respiration of the Leaves of Plants. Pepys, W Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843). 1837-01-01. 4:466–466 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | Abstract of a Letter from Mr. Pennant to Rich. Holford Esq; Master in Chancery, of an Earthquake Felt in Flintshire, on April 2. 1750 - Pennant, M. Abstract of a Letter from Mr. Pennant to Rich. Holford Esq; Master in Chancery, of an Earthquake Felt in Flintshire, on April 2. 1750. Pennant, M Philosophical Transactions (1683-1775). 1753-01-01. 46:687–687 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | Extract of a Letter from Chester, concerning an Earthquake Felt There April 2. 1750. Communicated by Robert Paul Esq; F. R. S. - Paul, R. Extract of a Letter from Chester, concerning an Earthquake Felt There April 2. 1750. Communicated by Robert Paul Esq; F. R. S Paul, R Philosophical Transactions (1683-1775). 1753-01-01. 46:683–683 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 5 |  |
![[texts]](/images/mediatype_texts.gif) | The Post Script of a Letter from Mr. Nath. Downe to the Hon. Mr. Greenville, concerning an Earthquake Felt at Bridport, on March 18. 1749-50 - Downe, N. The Post Script of a Letter from Mr. Nath. Downe to the Hon. Mr. Greenville, concerning an Earthquake Felt at Bridport, on March 18. 1749-50. Downe, N Philosophical Transactions (1683-1775). 1753-01-01. 46:688–688 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | On the Electrical Condition of the Egg of the Common Fowl. - Davy, J. On the Electrical Condition of the Egg of the Common Fowl. Davy, J Proceedings of the Royal Society of London (1854-1905). 1859-01-01. 10:31–31 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | On the Attractions of an Extensive Class of Spheroids. - Ivory, J. On the Attractions of an Extensive Class of Spheroids. Ivory, J Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843). 1800-01-01. 1:415–415 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | Supplement to a Paper, Read January 27, 1859, on the Thermodynamic Theory of Steam-Engines with Dry Saturated Steam, and Its Application to Practice. - Rankine, W. Supplement to a Paper, Read January 27, 1859, on the Thermodynamic Theory of Steam-Engines with Dry Saturated Steam, and Its Application to Practice. Rankine, W Proceedings of the Royal Society of London (1854-1905). 1859-01-01. 10:183–183 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | Electro-Physiological Researches.Fourth Memoir. On the Physiological Action of the Electric Current. - Matteucci, C. Electro-Physiological Researches.Fourth Memoir. On the Physiological Action of the Electric Current. Matteucci, C Abstracts of the Papers Communicated to the Royal Society of London (1843-1854). 1843-01-01. 5:629–629 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 7 |  |
![[texts]](/images/mediatype_texts.gif) | [Letter Addressed to Michael Farraday] - Stevenson, W. [Letter Addressed to Michael Farraday]. Stevenson, W Abstracts of the Papers Communicated to the Royal Society of London (1843-1854). 1850-01-01. 6:291–291 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 7 |  |
![[texts]](/images/mediatype_texts.gif) | Total Eclipse of the Sun, 1896.--The Novaya Zemlya Observations. - Baden-Powell, G. Total Eclipse of the Sun, 1896.--The Novaya Zemlya Observations. Baden-Powell, G Proceedings of the Royal Society of London (1854-1905). 1896-01-01. 60:271–271 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | An Extract of a Letter, Written by Monsieur Denys Novemb. 17. Last from Paris Concerning an Odd Faetus Lately Born there; English't Out of French - Denys, M. An Extract of a Letter, Written by Monsieur Denys Novemb. 17. Last from Paris Concerning an Odd Faetus Lately Born there; English't Out of French. Denys, M Philosophical Transactions (1665-1678). 1753-01-01. 8:6157–6157 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | Extract of a Letter from Simon Peter Pallas, M. D. of Berlin, to Mr. Emanuel Mendez da Costa, Librarian to the Royal Society, Relating to the State of the State of the Cold There Last Winter, Dated Feb. 12, 1763 - Pallas, S. Extract of a Letter from Simon Peter Pallas, M. D. of Berlin, to Mr. Emanuel Mendez da Costa, Librarian to the Royal Society, Relating to the State of the State of the Cold There Last Winter, Dated Feb. 12, 1763. Pallas, S Philosophical Transactions (1683-1775). 1763-01-01. 53:62–62 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | Errata: Professor Malet's Classes of Invariants Identified with Sir James Cockle's Criticoids Errata: Professor Malet's Classes of Invariants Identified with Sir James Cockle's Criticoids. Proceedings of the Royal Society of London (1854-1905). 1884-01-01. 38:0–0 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | Studies on Enzyme Action--Lipase - Nicloux, M. Studies on Enzyme Action--Lipase. Nicloux, M. Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character (1905-1934). 1906-04-12. 77 (519):454–454 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | Part of a Letter Written by Roelof Diodati, Supream Director of the Council of Mauricius; to Mr. Witsen, Burger-Master of Amsterdam, and F. R. S. Dated August 8. 1697. concerning an Extraordinary Inundation in That Island - Diodati, R. Part of a Letter Written by Roelof Diodati, Supream Director of the Council of Mauricius; to Mr. Witsen, Burger-Master of Amsterdam, and F. R. S. Dated August 8. 1697. concerning an Extraordinary Inundation in That Island. Diodati, R Philosophical Transactions (1683-1775). 1753-01-01. 20:268–268 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 7 |  |
![[texts]](/images/mediatype_texts.gif) | Petrifactions of the Earliest European Angiosperms - Stopes, M. Petrifactions of the Earliest European Angiosperms. Stopes, M. Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character (1905-1934). 1912-07-25. 85 (579):249–249 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 5 |  |
![[texts]](/images/mediatype_texts.gif) | Some Observations Communicated by Signior Manfredus Septalius from Milan, Concerning Quicksilver Found at the Roots of Plants, and Shels Found upon In-Land Mountains - Septalius, M. Some Observations Communicated by Signior Manfredus Septalius from Milan, Concerning Quicksilver Found at the Roots of Plants, and Shels Found upon In-Land Mountains. Septalius, M Philosophical Transactions (1665-1678). 1753-01-01. 2:493–493 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 5 |  |
![[texts]](/images/mediatype_texts.gif) | An Experimental Investigation of the Phenomena of Endosmose and Exosmose. - Ritchie, W. An Experimental Investigation of the Phenomena of Endosmose and Exosmose. Ritchie, W Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843). 1830-01-01. 3:61–61 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 5 |  |
![[texts]](/images/mediatype_texts.gif) | On the Absence of Potassium in Protagon Prepared by Dr. Gamgee - Roscoe, H. On the Absence of Potassium in Protagon Prepared by Dr. Gamgee. Roscoe, H Proceedings of the Royal Society of London (1854-1905). 1879-01-01. 30:365–365 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 5 |  |
![[texts]](/images/mediatype_texts.gif) | Analysis of the Moira Brine Spring near Ashby-de-la-Zouch, Leicestershire, with Researches on the Extraction of Bromine. - Ure, A. Analysis of the Moira Brine Spring near Ashby-de-la-Zouch, Leicestershire, with Researches on the Extraction of Bromine. Ure, A Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843). 1830-01-01. 3:295–295 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 5 |  |
![[texts]](/images/mediatype_texts.gif) | On the Influence of Physical Agents on the Development of the Tadpole of the Triton and the Frog. - Higginbottom, J. On the Influence of Physical Agents on the Development of the Tadpole of the Triton and the Frog. Higginbottom, J Abstracts of the Papers Communicated to the Royal Society of London (1843-1854). 1843-01-01. 5:949–949 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | On the State of Water and Aeriform Matter in Cavities Found in Certain Crystals. - Davy, H. On the State of Water and Aeriform Matter in Cavities Found in Certain Crystals. Davy, H Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843). 1815-01-01. 2:174–174 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | On the Expansion of Any Functions of Multinomials. - Knight, T. On the Expansion of Any Functions of Multinomials. Knight, T Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843). 1800-01-01. 1:390–390 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | Letter to Dr. Sharpey, Sec. R.S., from Dr. Thomas Williams, F.R.S., Dated Swansea, Dec. 12, 1858 - Williams, T. Letter to Dr. Sharpey, Sec. R.S., from Dr. Thomas Williams, F.R.S., Dated Swansea, Dec. 12, 1858. Williams, T Proceedings of the Royal Society of London (1854-1905). 1857-01-01. 9:589–589 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | Welt Mechanik. - Kropalschek, M. Welt Mechanik. Kropalschek, M Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843). 1830-01-01. 3:413–413 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | On the Method of Determining, from the Real Probabilities of Life, the Values of Contingent Reversions in Which Three Lives Are Involved in the Survivorship. - Morgan, W. On the Method of Determining, from the Real Probabilities of Life, the Values of Contingent Reversions in Which Three Lives Are Involved in the Survivorship. Morgan, W Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843). 1800-01-01. 1:4–4 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 5 |  |
![[texts]](/images/mediatype_texts.gif) | Meteorological Journal Kept at the Royal Observatory, Cape of Good Hope, from the 1st of February to the 31st of May, 1834. - Maclear, T. Meteorological Journal Kept at the Royal Observatory, Cape of Good Hope, from the 1st of February to the 31st of May, 1834. Maclear, T Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843). 1830-01-01. 3:302–302 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 7 |  |
![[texts]](/images/mediatype_texts.gif) | On the Weight of Hydrogen Desiccated by Liquid Air - Rayleigh, L. On the Weight of Hydrogen Desiccated by Liquid Air. Rayleigh, L Proceedings of the Royal Society of London (1854-1905). 1899-01-01. 66:334–334 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | Preface Preface. Proceedings of the Royal Society of London (1854-1905). 1904-01-01. 75:5–5 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | On the Theory of Consistence of Logical Class-Frequencies and Its Geometrical Representation. - Yule, G. On the Theory of Consistence of Logical Class-Frequencies and Its Geometrical Representation. Yule, G Proceedings of the Royal Society of London (1854-1905). 1901-01-01. 68:118–118 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 8 |  |
![[texts]](/images/mediatype_texts.gif) | On the Office of the Heart Wood of Trees. - Knight, T. On the Office of the Heart Wood of Trees. Knight, T Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843). 1815-01-01. 2:88–88 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 7 |  |
![[texts]](/images/mediatype_texts.gif) | An Extract of a Letter Written from Rome, Dated the 16th. of November Last, to Signior Sarotti, concerning a Discovery Made upon the Inundation of the Tevere. Translated out of the Italian An Extract of a Letter Written from Rome, Dated the 16th. of November Last, to Signior Sarotti, concerning a Discovery Made upon the Inundation of the Tevere. Translated out of the Italian. Philosophical Transactions (1683-1775). 1753-01-01. 16:227–227 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | Evaporation and Dissociation. Part V. A Study of the Thermal Properties of Methyl Alcohol. - Ramsay, W. Evaporation and Dissociation. Part V. A Study of the Thermal Properties of Methyl Alcohol. Ramsay, W.; Young, S Proceedings of the Royal Society of London (1854-1905). 1887-01-01. 42:37–37 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 6 |  |
![[texts]](/images/mediatype_texts.gif) | A Way of Making Vines Grow to Advantage, all Over the Roof of a House; Communicated by Mr. John Templer - Templer, J. A Way of Making Vines Grow to Advantage, all Over the Roof of a House; Communicated by Mr. John Templer. Templer, J Philosophical Transactions (1665-1678). 1753-01-01. 8:6016–6016 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 5 |  |
![[texts]](/images/mediatype_texts.gif) | An Extraordinary High Tide in the River Thames Observ d by Capt. Tho. Jones - Jones, T. An Extraordinary High Tide in the River Thames Observ d by Capt. Tho. Jones. Jones, T Philosophical Transactions (1683-1775). 1753-01-01. 34:68–68 Keywords: Proceedings of the Royal Society of London; Philosophical Transactions of the Royal Society Downloads: 5 |  |