Diffraction of electrons on microcrystallitic crystals or powders; gold. Photograph by J.J. Trillat.

1 photograph : photoprint ; image 5.2 x 5.3 cm

Or, depot électrolytique, 40 K.V. Lettering on verso: or, dépot électrolytique, structure microcrystalline désordonnée, électrons 40 KV; velox

Kept with four similar photographs and a sheet of paper giving information on content of photographs

Wellcome Collection 562117i