Mathematical drawing in pencil and ink, the central scale line is in pencil with curves drawn either side in ink with faint intersection lines drawn in pencil. The paper had been folded in half.
Inscription: Inscribed by Ostroff with: '23377'. Pencil drawing of a spectrum with a wrapper in Sir David Brewster's handwriting and inscribed with 'Place E6/ Place [?]/ In the Spectrum'. Originally mounted on a piece of card inscribed with '1832-DB'.
Inscription: Printed on recto: 'Tab V./ Zu Fraunhofer's Gesetze der Bengung des Lichtes Deutsch B.VII/ Fraunhofer del.'. Plate five from a publication showing an example of Fraunhofer's diffusion; it shows light patterns produced through a telescope.
Inscription: Printed on recto: 'Tab III./ Zu Fraunhofer's Gesetze der Bengung des Lichtes Deutsch B.VII/ Fraunhofer del.'. Plate three from a publication showing an example of Fraunhofer's diffusion; it shows light patterns produced through a telescope.
Inscription: Printed on recto: 'Tab IV./ Zu Fraunhofer's Gesetze der Bengung des Lichtes Deutsch B.VII/ Fraunhofer del.'. Plate four from a publication showing an example of Fraunhofer's diffusion; it shows light patterns produced through a telescope.