image ledermuller_tab_11
Image number: RS.18113
Credit: ©The Royal Society

Crystals of ‘Ens veneris’

Date

1764

Creator

Adam Wolfgang Winterschmidt (1733-1796, German), Engraver

After

Martin Frobene Ledermuller (1719-1769, German), Naturalist

Object type

Library reference

48660

Material

Technique

Dimensions

height (print): 245mm
width (print): 195mm

Subject

Content object

nature
   > mineral

Description

Study of the crystals of ‘ens veneris’ a preparation of sal ammoniac [mineral ammonium chloride] and blue vitriol [copper sulphate] viewed by microscope, under magnification.

Plate 11 from Amusement microscopique, tant pour l'esprit que pour les yeux, contenant... estampes... d'apres nature... by Martin Frobene Ledermuller, plates volume (Adam Wolfgang Winterschmidt, Nuremburg, 1764).

Inscribed above: ‘TAB.XI.’

The accompanying text is headed: ‘Table XI. Ens veneris.’ The author comments that: ‘Et c'est aussi la même Couleur que conservent les Cristaux sous le Microscope, de forte que dans un Jour bienclair, ils ressemblent à l'Or ou aux plus belles Topazes & Crysolites’. […the crystals under the microscope…look like gold or the most beautiful topaz & crysolites].

Martin Frobene [Frobenius] Ledermuller (1719-1769) German naturalist was employed in various capacities as a notary, turning to microscope studies after an illness induced temporary deafness.

Associated place

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      > Germany