DEMONSTRATION SIMPLE MICROSCOPE:

DESCRIPTION:This is a small demonstration simple microscope. It has brass slide clips on the bottom to hold the slide. It has a spiral twist focus and a hard rubber eyecup. It is of fixed, low power magnification. A locking screw is provided so that once focused it is not easily disturbed. The eyecup has a diameter of 40 mm. The outer barrel has a diameter of about 24.5 mm(1 inch). The stage measures 31 x 70 mm. The instrument has a maximum length of 71 mm with the eyepiece extended and 49 mm closed.

HISTORY OF THE THIS MICROSCOPE
From as early as the eighteenth century, microscopists have shared their interests or put on exhibitions of microscopical objects. One way to share the view under the microscope with a large number of people is with a hand-held demonstration microscope which is meant to be passed from person to person. Hand held microscopes for demonstration were sold by many of the major nineteenth century makers. This microscope is unusual in that it is a simple rather than compound microscope. Compound forms of demonstration microscope from the early twentieth century sold by Leitz(left) and Bausch & Lomb(right) are shown here. Demonstration microscopes were often marketed for use in classrooms. For more on this subject, and a review of the type see the article on Demonstration Microscopes on this website.