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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'.

Correspondence and documents relating to the commemoration of the fiftieth anniversary of the discovery of X-rays, 1945 with the British Institute of Radiology.

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.

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

A collection of tracts on fortification and geometry, 17th and 18th centuries: Folio 1 Della Fortificatione; Folio 53 Geometrica Prattica; Folio 83 Della sfera; Folio 104-115 Blank sheets and oddments; Folio 116 Del Misurare da Contano; Folio Il quaduarete Geometrico; Folio Aritmetica.

Notebooks on experiments on worms, frogs and snails (chemical and electrical) 29 December 1858 to 21 July 1859, with an undated fragment of a letter concerning the health of Mrs Petrie.

Drawings of the customs and manners of Tonkin [Hanoi], Vietnam, to accompany the written description of Samuel Baron (fl.1670s-1690s) of Fort St George, Madras. Engraved versions of these illustrations were later published as part of 'A collection of voyages and travels, some now first printed from original manuscripts', ed. Awsham and John Churchill (London, 1732). Manuscript amendments and inscriptions indicate some pre-publication correction, probably by the printer.

Illustrations of Pharaonic Egypt: plates (nos 25-36) and corresponding text sheets for a publication (volume 2) by American Polytechnic Co (Limited), Buffalo, NY (Publishers), depicting mummies, obelisks and a map of Thebes.

Preliminary Report on, and photographs of, the event mounted and bound into one volume. Includes a letter from James Hector donating the report and photographs. Includes a second letter of 22 September 1886 with an additional 15 photographs with remarks on the back which have also been pasted in to the volume. The comments have been typed underneath the photographs.

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.

Philosophia Universalis Pertineis a Gabrielem Colleno Logicum, 1694.

Astronomical Observations at Lauenburg and Lyssabel, 1820.