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Kew Observatory Sunspot measurements from 24 January 1864 to 9 April 1872.

'The Right ascension and Polar distance brought to January 1800 of the 2500 Nebulae and Clusters of Stars', printed in the Philosophical Transactions by Sir William Herschel.

General Catalogue of new Nebulae and Clusters of Stars by Sir William Herschel.

General Index of the 2500 Nebulae of Sir William Herschel drawn up by Sir John Herschel.

Catalogue of nebulae of Sir John Herschel: A bundle of working sheets with the title 'Sir J F W Herschel's Catalogue of Nebulae'.

Plans and surveys of the Royal Society's lands at Acton and Mablethorpe.

Miscellaneous letters and papers concerning the landed property of the Royal Society covering the nineteenth century.

Observations at Greenwich Observatory by the Reverend Nevil Maskelyne, DD, FRS, covering; transits 1765-1810; zeniths 1765-1810 and observations of comets 1769-1790.

A small notebook containing parliamentary and other speeches.

Notebook entitled 'Glass Furnace Notebook. Royal Institution' in Michael Faraday's hand.

A series of volumes containing additional papers read before, or collected by the Royal Society and others not entered into the Classified Papers series.

An account of the shipwreck of the 'Johanna', commanded by Captain Robert Brown near the Cape of Good Hope on 29 May 1682, and of the subsequent fate of the crew.

Letters and papers about the affairs of the Greenwich Observatory in the eighteenth and early nineteenth centuries.

Letters and papers of Sir Thomas Edward Thorpe including scientific letters to T E Thorpe from colleagues, with documents relating to the Chemical Warfare Committee of the International Law Association. Containing also Thorpe's own letters to family members, his testimonials for work appointments and obituary notices.

Letters and papers of Alexander Gordon Laing chiefly relating to his last and fatal expedition to Timbuktoo.

Collected papers of William Fletcher Barrett including letters to Barrett with supporting documents by Barrett on scientific interests and some photographs.

General Index to the Papers published in the Proceedings of the Royal Society of London, volumes 1-75. 1800-1905 volume I Authors, by H W Robinson. Printed in 1913.

Visitors book to the Sir Isaac Newton Exhibition, 13-31 August 1951.

Inspectors' Visitation of the Royal Society Library, 1768-1769 and 1777.

Originals of the Fellows bonds for payment of fees to the Royal Society: Volume 1 covers 1674-1729, and Volume 2 covers 1729-1809.

Lists of Visitors introduced at Meetings of the Royal Society in 9 volumes as follows: Volume 1 1783-1788; Volume 2 1812-1820; Volume 3 1822-1832; Volume 4 1847-1855; Volume 5 1856-1866; Volume 6 1867-1877; Volume 7 1878-1888; Volume 8 1889-1898; Volume 9 1899-1906.

Commonplace Book of Theology of Robert Boyle.

Alphabetical Index to the Printed Minutes of the Council of the Royal Society, 1845, in the hand of Dr Roget.

Acquisitions book for the Royal Society Library, appears to be nineteenth century.

Commonplace book of medical or pharmaceutical recipes in various hands containing receipts from Boate, Hartlib and Willis. Notebook belonging to Robert Boyle.

Catalogue of the Royal Society Museum, possibly seventeenth or early eighteenth century.

A list of presents to the Royal Society, 1831-1849.

A list of objects presented to the Royal Society Museum, 1744-1779.

An ecclesiastical and astronomical calendar, together with the tables and figures of the zodiac: folding calendar on a sheet of parchment. Originally two rows, each of twenty four folds, but the first folds in the lower row ( lower if the sheet is looked at from the side containing art. 1) are missing and the first fold in the upper row has been sewn to the foot of the second fold. Three membranes were joined to make a sheet.

In both rows on one side, the calendar is in blue, red, green and black, four folds to a month. The second half of January is missing. Entries in red include Edwardii Regis and Translacio Edwardi Regis (20 March, 13 October); in black, Translacio Mildride (13 July). Each feast is illustrated by a conventional head, sideways, in coloured penwork: kings crowned, abbots tonsured etc. The ruling is in red and green inks.

On the other side, the other way up: (a) in the upper row, the sign of the zodiac in each month, followed by its occupation; (b) in the lower row, an astronomical calendar, 1 january to 15 June on 22 folds, four to a month.

(a) The January sign and occupation are missing. The December occupation came on the fold which was exposed when the sheet was closed and has been rubbed away.

(b) The first two folds were left blank.

Written in England. Contains the curious characters known as the Boetian contractions, and is a valuable document for the history of arithmetic. The treatise commences on the Roman abacal system, and afterwards proceeds to give an explanation of the Eastern Boetian system with altered characters, and with a complete adoption of the advantages of local position. In Folio 2, recto, line 5, the author says that he will expound 'quaedam de numerorum scientia. regulis uidelicet algorismi' and on Folio 3, verso, he refers to Pithagoras, Nicomachus, Apuleius and Boethius. The text ends on the first line of Folio 34, recto, and is followed by eight lines in a semi-current 13th century hand.

Folio 1, recto ' Prefatio sequentis operis. Vt ait salomon.. punge oculum. et profert lacrimam. punge cor' et profert sensum.....'

Folio 4, verso ' De impari numero..'

Folio 6, verso, line 6, ' Divisio algorismi '. The divisions are given as folows; ' digitus, mediato, multiplicatio, divisio '

Folio 8, recto, title in red in margin, ' Qualiter digitus multiplicat digitum '

Folio 9, recto, line 15 ' Qualiter articulus multiplicatur per articulum '

Folio 9, verso, line 13, heading in red, ' Qualiter digitus multiplicat articulum '

Folio 10, recto, line 10, heading in red, ' Qualiter compositus per compositum multiplicatur '

Folio 10, verso, heading in margin, ' Qualiter compositus multiplicat compositum non eundem habens articulum '

Folio 11, recto, bottom line, heading in red ' Regulo ab uno inequalibus '

Folio 12, recto, line 6, heading in red, ' Regula ab uno in equalibus binario adjecto '

Folio 12, verso, line 8, heading in red ' De duplicatione '

Folio 13, recto, line 5, heading in red, ' De pari adjecto '

Folio 13, verso, line 6, heading in red, ' De impari adjecto '

Folio 14, verso, heading in margin, ' De proposito secundum novenarium dispositum '

Folio 15, recto, line 7-8, heading in red, ' De significationibus et nominibus figarum et locorum '
Transcript extract from line 14 ' Prima itaque omnium est igin. 1. id est unitas. Secunda andras. 2. id est binarius. Tercia ormis. 3. id est ternarius. Quarta arbas. 4. id est quaternarius. Quinta quimas. 5. id est quinarius. Sexta caltis. 6. id est senarius. Septima zemis. 7. id est septenarius. octava celentis. 8. id est octonarius. Nona cemenias. 9. id est novenarius. Singule ataque figure in quocumque loco sint sui ipsius exprimunt significationem. Nunquam enim figura unitatis officium binarii sibi usurpabit, nec binarius ternarii, nec ternarius quaternarii, nec quelibet ceterarum quod alter significare poterit. Ad majorem itaque evidentiam significationes locorum ponamus. primo ita loco posita igin seipsam, id es unitatem, significat. Secundo denarium. Tercio centenarium. Quarto millenarium. Quinto decem milia. Sexto centum milia. Septimo mille milia. Decimo mille mille milia. Undecimo decies milies mille milia. Duodecimo centies milies mille milia. Terciodecimo milies milies mille milia, et sic usque in infinitam singulorum decuplationem locorum extenditur. Similiter autem et andras rimo loco seipsam, id est binarium, significat. Secundo xx. Tercio cc. Quarto duo milia. Quinto xx. Sexto cc. Septima mm. et sic per cetera loca eodem cemate et cetere figure secundum propriam differentiam decuplabutn singulos articulos per loca singula. Est adhucet decima figura cujus nulla significatio est, sed tamen per loca disposita ceterarum significationes auget vel minuit. Dicitur autemzifera, et taliter depingitur 0. Sciendum autem quod omnes figure versus sinistram scribi debent, quia sic vim extendunt. Sed e converso literali ordine legi. '

Folio 17, verso, line 6, heading in red, ' De subtractione'

Folio 18, verso, line 8, heading in red, 'De dupli``catione'.

'Descriptio Itineris Alpini, Annis 1703, 1704 et 1705, per summas Helvetiae et totius Europae Alpes facti, a J Jacobo Scheuchzero, MD, Mathescos Professore Societatum Leopoldinae et Regiarum Anglicae et Prussiacae Membro'. Descriptions of journeys in the Alps by J J Scheuchzer, in four volumes:

Volume 1, 60 ff and 23 sheets of drawings

Volume 2, 109 ff and 39 sheets of drawings

Volume 3, 25 ff and 12 sheets of drawings

Volume 4, 279 ff and 13 sheets of drawings.

Letters and papers of the Royal Society Sylvester Medal Fund including correspondence regarding the setting-up of a Sylvester Memorial by international committee.

Congratulatory addresses on the occasion of the Royal Society Lister Centenary in 1927.

Correspondence, agendas, memos, drafts and printed reports on topics investigated by the Food (War) Committee of the Royal Society, and the day to day committee business.

National Physical Laboratory Executive Committee Minutes, 1924-1925.

Letters and papers about the early years of the National Physical Laboratory.

Papers on mathematics and physics collected by the Reverend Samuel Horsley DD, FRS.

Philosophia Universalis Pertineis a Gabrielem Colleno Logicum, 1694.

Papers relating to the 250th Anniversary of the Incorporation of the Royal Society consisting of two separately bound addresses from the University of Paris and the University of Parma, a box of addresses from Europe other than the United Kingdom, Japan, USA, and the British Empire; a box of addresses from the United Kingdom; and a box of other miscellaneous papers.

Secretaries Draft Minutes of Meetings of the Royal Society: these are the notes, more or less rough, which were written up to make the Journal Books. They fall into two sections;

1. 'Original Minutes' A series of guardbooks and packets of papers, 12 in number, containing original minutes of the Society's meetings. These minutes gradually approach nearer and nearer to the form and appearance of the Journal Book, and the last few volumes (from 15 onwards) are little different from the corresponding volumes of the Journal Book in their style.

2. 'Rough Minutes' A series of 5 notebooks containing rough minutes of meetings. It seems likely that these are the notes taken down by the Secretary at the meetings, which were later written out much more carefully to make the original minutes (which are usually more legible and more clearly intended to be preserved). These 5 notebooks cover fairly well the gaps in the series of Original minutes caused by the absence of Volume VI (almost certainly this is Sloane MS 3342 in the British Library) and the exceedingly fragmentary state of Volume V.

Disregarding the gaps, the period covered by the combined original and rough minutes is from August 1662 to November 1761. The period covered by the individual volumes are also shown on the backs of the volumes

A dictionary (Italian/English) of Italian proverbs rendered into English, by Benjamin Polsted. A-I only.

Astronomical tracts with observations by Tycho Brahe and others including:

1. Tychonis Brahe observationes cometae AD 1585 (folio 1)

2. Ejusdem observationes cometae AD 1590 (folio 10)

3. Ejusdem observationes cometae AD 1596 (folio 18)

4. Observations astronomiques faites a la ville de Cartagene des Indes par le Colonel Don Juan de Herrara et Sotomayor (accompanied with a letter to Dr Halley, dated Cartgena des Indes 12 July 1723) Several of these observations have since been published in the Memoirs de l'Academie des Sciences de Paris 1729 page 361, 362-363, 367 (Folio 23).

5. Observationes astronomiques pour la longitude de Cartagene des Indies faites avec le premier satellite de Jupiter l'annee 1723 (Folio 41);

6. Eclipses Solis et Lunae observatae...in oppido S S Cosmae et DamIani 1719-1726, a P Bonaventura Suarez S J (Folio 44); 7. Immersiones et Emersiones Satellitum Iovis observatae in oppido S S Cosmae et Damiani 1720-1726, a P Bonaventure Suarez S J (Folio 46).

Manuscript of the work 'Philosophical Experiments, containing Usefull and necessary Instructions for such as undertake long Voyages at Sea', by Stephen Hales, printed by and at the expense of the Royal Society in 1739.

Copies of the outgoing letters written by the Foreign Secretaries of the Royal Society.

Copy of the diary of Sir John Herschel 1834-1870.

Two tracts on acids by John McNab comprising:

1. Experiments on Mineral Acids and Rectified Spirits of Wine, for finding the greatest degree of cold.

2. Experiments on the Congelation of Vitriolic and Nitrous Acids in Hudson's Bay.

Papers, mainly accounts, concerning the British Antarctic expedition (1910-1913).

Horizontal pendulum records from the British National Antarctic Expedition 1901-1904.

Diagrams and manuscript of paper on colour blindness prepared by Sir William Pole, prepared for his paper published in 'Philosophical Transactions' in 1859.

Manuscript of a paper 'Astronomical Experiment on the Peak of Tenerife, carried out under the sanction of the Lords Commissioners of the Admiralty. By Professor C. Piazzi Smyth. Communicated by G.B.Airy, Esq., Astronomer Royal' in 'Philosophical Transactions' Volume 148 (1858) pages 465-534. Folder of drawings and watercolours, including tipped-in stereoscopic cards. Received 2 June 1857, read 18 June 1857. Last two pages in the manuscript provide an explanatory account of the photographs, how they were taken and developed, and what materials were used.