Jewel or simply optical Stanhope Stanhope Viewer is an optical device that allows viewing of a photomicrograph without using a microscopio.1 2 A mid the twentieth century, Montserrat (and elsewhere) are coming memories (souvenirs) bringing one Stanhope built-in viewer in which you could see a landscape (eg Montserrat). They were invented by René Dagron in 1857. In 1851 John Benjamin Dancer photomicrographs invented the collodion process and a microscope become cámara.10 With that system got photomicrographs of about 3 square millimeters of area (0.0047 square inches) .11 The main disadvantage Dancer of the method was that viewing photomicrographs required a microscope at that time was an instrument caro.12 In 1857 Dagron solved the problem by inventing a method for assembling the photomicrographs to the end of a small lens cilíndrica.13 14 Dagron modified Stanhope sectioning its normally biconvex lens structure, maintaining a convex end, to refract light while which he cuts the other end with a completely flat shape so that remain just the focal plan of the lens forming convexo.2 14 side so obtained a plano-convex lens, and was able to mount microscope photography in part flat lens using Canada balsam as pegatina.2 14 This arrangement allowed to stay focused image.