Abstract: The invention is directed to a slide holder for receiving one or more microscope slides. The slide holder includes a generally rectangular frame and at least one slot, each of the slots for receiving one slide. Flexible retaining latches and retaining grooves are provided at each of the slots for facilitating the securing of the slides.

Abstract: A stabilized indicator powder for use in assays to detect the presence of peroxidase or other peroxidatively active substances, wherein the indicator is stabilized by being combined with a water soluble polymer. As a dry powder, the indicator retains its reactivity for at least several months. The powder readily dissolves in an aqueous medium and as a solution retains its reactivity for a period of weeks, even in the presence of peroxide.

Abstract: A transparent microscope slide for the diagnostic analysis of liquid specimens, the slide having on one surface a plurality of specimen retaining areas defined by a first boundary forming a test well and a second boundary forming a channel outside the first boundary. The channel, or confirming well, acts as a moat by retaining specimen liquid overflowing from the test well, yet does not interfere with microscopic analysis. The well can have a circular or square configuration, and the channel can have a square or circular ring configuration and be concentric with the well. The size of the wells can vary depending upon the particular liquid specimen analyzed and the diagnostic procedure utilized without interfering with the efficacy of the confirming wells.