The solid state ruby laser makes possible the recording of holograms without either the granite tables or vibration isolation equipment needed with gas lasers. The ruby laser is unique in that it can be made to emit several joules of light in a tenth of a microsecond. In their more conventional form, these lasers are not particularly coherent, due to the width of the ruby R1 lasing transition. Temporal coherence can be as low as one centimeter. Early work at this laboratory saw the development of holographic configurations which compensated for the limited spatial and temporal coherence of ruby lasers. These were used to record transmission holograms of combustion in rocket engines, aerodynamic flow patterns, particulate matter in coal furnaces, etc.