| RefNo | Title | Date |
| MS/710/85 | Letter from Baden Powell, Oxford, to Robert Were Fox, Falmouth | 22 January 1838 |
| MM/21/61 | Letter from Baden Powell to Richard Owen | 27 May 1850 |
| RR/3/69 | Referee's report by Baden Powell, on a paper 'Researches on the velocities of currents of air in vertical tubes, due to the presence of aqueous vapour in the atmosphere' by W D Chowne | 10 October 1855 |
| RR/1/234 | Referee's report by John Frederick William Herschel, on two unnamed papers by George Gabriel Stokes and Baden Powell | [c.1848] |
| RR/3/88 | Referee's report by Baden Powell on a paper, 'On the influence of temperature on the refraction of light' by John Hall Gladstone and T P Dale | 18 October 1858 |
| RR/1bis/36 | Referee's report by George Biddell Airy, on a paper 'Observations on certain cases of elliptic polarization of light by reflexion' by Baden Powell | 7 March 1843 |
| MC/4/338 | Letter from [Baden] Powell to [Samuel Hunter] Christie, [Secretary of the Royal Society] | 24 March 1850 |
| MS/426/344 | Copy letter from C R [Charles Richard] Weld, the Assistant Secretary of the Royal Society; to G G [George Gabriel] Stokes Esq | 15 November 1848 |
| RR/1/188 | Referee's report by John Frederick William Herschel, on a paper 'On the theory of the dark bands formed in the solar spectrum from partial interception by transparent plates' by Baden Powell | 21 May 1840 |
| RR/2/192 | Referee's report by John Frederick William Herschel, on a paper 'Remarks on certain points in experiments on the diffraction of light' by Baden Powell | December 1851 |
| EC/1824/09 | Powell, Baden: certificate of election to the Royal Society | |
| PT/18/12 | Paper, 'An account of some experiments relative to the passage of radiant heat through glass screens' by Rev Baden Powell | 9 March 1826 |
| PT/29/9/5 | Plate, figures 1-3 showing polariscope and rings of elliptic light by unknown artist | [1845] |
| PT/27/5 | Paper, 'Observations on certain cases of elliptic polarization of light by reflexion' by Rev Baden Powell | [1842] |
| PT/29/9/1 | Manuscript, ‘On the elliptic polarization of light, by reflexion from metallic surfaces’ by Rev Baden Powell | [1845] |
| AP/31/18 | Unpublished appendix, 'Supplement to a paper on the theory of certain bands seen in the spectrum' by George Gabriel Stokes | 1848 |
| PT/29/9/3 | Plate, appearance of rings of elliptic light by Baden Powell | [1845] |
| PT/29/9/2 | Plate, appearance of rings of elliptic light by unknown artist | [1845] |
| PT/29/9/4 | Plate, appearance of rings of elliptic light by Baden Powell | [1845] |
| PT/34/13/1 | Manuscript, 'On a new case of the interference of light' by Rev Baden Powell | [1848] |
| MC/2 | Volume 2 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1832-1838 |
| PT/29/9 | Paper, ‘On the elliptic polarization of light, by reflexion from metallic surfaces’ by Rev Baden Powell | [1845] |
| MC/4 | Volume 4 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1844-1850 |
| PT/34/13 | Paper, 'On a new case of the interference of light' by Rev Baden Powell | [1848] |
| AP/11/15 | Unpublished paper, 'An account of some farther experiments on the heating power of the prismatic rays' by Baden Powell | [1822] |
| AP/11/16 | Unpublished paper, 'Further experiments respecting the exterior heating effect of the prismatic spectrum' by Baden Powell | [1824] |
| AP/11/15/2 | Unpublished diagrams, light rays refracting through prisms by [Baden Powell] | [1822] |
| AP/11/15/1 | Unpublished manuscript, 'An account of some farther experiments on the heating power of the prismatic rays' by Baden Powell | [1822] |
| PT/34/13/2 | Plate, arrangements for experiments in light interference by Baden Powell | [1848] |
| AP/14/16 | Unpublished paper, 'An experimental enquiry relative to the polarization of heat' by Baden Powell | [1830] |
| AP/14/16/1 | Unpublished manuscript, 'An experimental enquiry relative to the polarization of heat' by Baden Powell | [1830] |
| AP/14/16/2 | Unpublished diagrams, apparatus used in experiments on heat polarisation by Baden Powell | [1830] |
| MC/7/249 | Letter from [Henrietta] Baden Powell, 1 Hyde Park Gate South, to the Secretary of the Royal Society | 14 August 1865 |
| MC/7 | Volume 7 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1864-1866 |
| AP/12/19 | Unpublished paper, 'An account of some prismatic experiments' by B [Baden] Powell | 17 November 1825 |
| RR/1bis/22 | Third referee's report by Baden Powell, on a paper 'On the diurnal temperature of the Earth’s surface, and the discussion of a simple formula for ascertaining the same' by S M Drach | 28 May 1843 |
| RR/2/191 | Referee's report by George Biddell Airy, on a paper 'Remarks on certain points in experiments on the diffraction of light' by Baden Powell | 5 April 1852 |
| AP/19/15/1 | Unpublished manuscript, 'A new method of discovering the equations of caustics' by G H S [George Henry Sacheverell] Johnson | 1835 |
| AP/19/15 | Unpublished paper, 'A new method of discovering the equations of caustics' by G H S [George Henry Sacheverell] Johnson | 1835 |
| RR/1bis/20 | Second referee's report by Baden Powell, on a paper 'On the diurnal temperature of the Earth’s surface, and the discussion of a simple formula for ascertaining the same' by S M Drach | 8 June 1842 |
| PT/34/14 | Paper, 'On the theory of certain bands seen in the spectrum' by G G [George Gabriel] Stokes | [1848] |
| AP/33/22 | Unpublished paper, 'Remarks on certain points in experiments on the diffraction of light' by Baden Powell | 1851 |
| RR/2/98 | Referee's report by Baden Powell, on a paper 'Further researches into the properties of the sulphate of lodo-quinine or Herapathite, more especially in regard to its crystallography, with additional facts concerning its optical relations' by William Bird Herapath | 26 April 1854 |
| RR/2/62 | Referee's report by Baden Powell, on a paper 'Sur la théorie de I'orientation du plan oscillatoire du pendule simple, et son application à la recherche de I'aplatissement du sphéroide terrestre' by M Oliveira [Baptiste d'Oliveira on index card] | 15 March 1854 |
| AP/39/4 | Paper, 'On the causes of the great variation among the different measures of the Earth's mean density' by W S [William Stephen] Jacob | 1856 |
| AP/39/4/1 | Manuscript, 'On the causes of the great variation among the different measures of the Earth's mean density' by W S [William Stephen] Jacob | 1856 |
| RR/1/77 | Referee's report by Baden Powell, on a paper 'On the physics of media that are composed of free and perfectly elastic molecules in a state of motion' by John James Waterston | [1846] |
| AP/3/12 | Unpublished paper, 'Experiments on the heating power of the prismatic rays' by Baden Powell | [early 19th century] |
| RR/1/155 | Referee's report by Baden Powell, on a paper 'On the total reflection from the surface of any crystal' by Michael Macann | 12 March 1848 |
| RR/1bis/18 | Referee's report by Baden Powell, on a paper 'On the diurnal temperature of the Earth’s surface, and the discussion of a simple formula for ascertaining the same' by S M Drach | 20 April 1842 |
| RR/2/190 | Referee's report by Baden Powell, on a paper 'Theory of the reciprocal action between the solar rays and the different media by which they are reflected, refracted, or absorbed; in the course of which various optical laws and phenomena are elucidated and explained' by Joseph Power | 21 July 1853 |
| AP/11/17 | Paper, 'An experimental enquiry into the nature of the radiant heating effects from terrestrial sources' by Baden Powell | [1824] |
| MS/426/433 | Copy letter from S [Samuel] Hunter Christie, Secretary of the Royal Society; to Dr Lloyd; to [George Biddell] Airy; to Sir D [David] Brewster; to J [John Frederick William] Herschel; to Prof [James David] Forbes; W H [William Hallowes] Miller; Baden Powell; and Dr Thewell | 16 November 1850 |
| HS/14/50 | Letter, from Baden Powell to Sir John Herschel, dated at 6 Stanhope St. | 14 May 1860 |
| HS/14/49 | Letter, from Baden Powell to Sir John Herschel, dated at 6 Stanhope St. | 16 November 1859 |
| HS/14/47 | Letter, from Baden Powell to Sir John Herschel, dated at Clapton | 18 November 1825 |
| HS/14/48 | Letter, from Baden Powell to Sir John Herschel, dated at 6 Stanhope St. | 14 June 1856 |
| MS/743/1/34 | Letter from Baden Powell, 6 Stanhope Street, Hyde Park Gardens, to John Hall Gladstone | 11 June 1859 |
| MS/401/1 | Lending book of the Royal Society Library | 5 April 1825-1 September 1853 |