An interesting and popular way of mounting and displaying various small individual objects was selecting and positioning them into groups, using geometric or patterned arrangements. Slides were made with a wide variety of arranged 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 on the next page.