Bar And Gauge surgical microscope Despite its solid build

Despite its solid build

or a scientific laboratory

Anyone serious about their observations will find immense value in the clarity and detail provided by this eyepiece

conduct experiments

High Efficiency and Low Noise

Bar And Gauge surgical microscope Despite its solid buildBar And Gauge For illustrating expansion by heating and contraction by cooling. Comprising a bar of iron mounted on a support rod with wooden handle, and a brass gauge with a cut out which barely admits the bar lengthways while cold, and a hole which passes the bar endways only while cold. Heating the bar and then comparing it to the gauge provides an excellent visual demonstration of thermal expansion.