Inscription: Inscribed in ink; 'C.T./ Thun 1833'. A pencil drawing by Constance Talbot looking down on the river Aare with the covered wooden bridge at the extreme left of the drawing and the neighbouring countryside beyond.
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.