The Light Microscopy Module (LMM), developed and managed by NASA Glenn Research Center (GRC), is producing fascinating results. LMM will yield even more astonishing results with the addition of enhancing subsystems. Techshot is developing one such subsystem, the LMM-Dynamic Stage (LMM-DS), which will satisfy a host of new experiments. However, GRC has many more researchers awaiting enhancing subsystems for conducting experiments that could lead to new materials with significant commercial potential. Capitalizing on Techshot's rapid progress with the LMM-DS, its vast array of mixing and separations technologies, and its experience with microfluidic systems, Techshot proposes development of a Finite Internal Temperature Slide (FITS) a hollow microscope slide capable of taking temperature measurements of a sample along the length of a slide without significant optical interference. Additionally this technology will apply heating to the sample by passing a current through the resistive path used for temperature measurement. This allows for more accurate, varied and controlled temperature gradients to be applied across a sample volume while maintaining optical clarity. FITS is a direct result of a need expressed by current NASA funded Principal Investigators who intend to use the LMM for experiments in which temperature, and/or temperature gradients, must be precisely controlled.