An interesting and popular way of mounting and displaying various small individual objects was by selecting and positioning them into groups, usually geometric or patterned arrangements. Slides were made using a wide variety of microscopic objects, including foraminifera, radiolaria, diatoms, insect and butterfly scales, seeds, sponge spicules, etc. One can only imagine the skill and patience required! Preparations were produced for both reflected (top lighting) and transmitted lighting. Photomicrographs of arrangements are from the slides shown. Note that the Salon-Slide by E. Thum, would probably be more accurately considered an Exhibition slide, which are covered further on the "Exhibition" page.

Unusual arranged mount of Sponge Spicula by A.C. Cole, imaged using Darkfield lighting.

Arranged diatoms, imaged using Phase Contrast in transmitted light

Above, three arranged slides, all prepared using marine species by Amos Topping. Photomicrographs taken from the slides are shown below, imaged using incident light.

Arranged slide, Watson & Sons "Eggs of Butterflies, Etc." shown in detail.

Above, three arranged slides on opaque backgrounds for incident lighting, and below, the Watson & Sons "Group of Flowerseeds" shown in detail.

Above, an Arranged Exhibition Slide comprised of Diatoms, Sponge Spicules, and Plates and Anchors of Synapta; Imaged using Darkfield lighting technique.

Below, an interesting arranged mount of Quartz Fragments from Volcanic Dust, John H. Day, early 1900s, imaged using crossed polarizing filters with oblique lighting methods.

Above, two beautiful examples of Arranged mounts using various Diatom species; imaged using Darkground lighting.  Below, a colourful 1" x 3" slide from Watson & Sons, titled "Arranged parts of Butterflies, Beetles, etc."