Abstract: Disclosed is a specimen holding device suitable for holding fluid substances which are to be analyzed and which cause clouding or color change by reacting with a reagent, comprising a generally solid piece of transparent material containing a plurality of elongated recesses having the longitudinal axis thereof extending into the material, preferably perpendicularly to the top surface of a solid piece. Preferably, the recesses are iterconnectedat their lower ends with a filling channel which terminates on one side surface of the device. Also disclosed is a method for using the device.