A cardboard box contains a number of removable filters, filter holders, backing plates, and “miners cards” used in a Type 113A gravimetric dust sampler. The…
A grey-brown instrument incorporating a handle. On the upper face above the handle are three knobs and a gage that reads in milliroentgens per hour.…
A metallic tube with a metal clip attached to its upper portion. On the top side of the cylinder, a clear window gives a view…
A rectangular instrument with a grey base and a white top. The shell of the instrument is constructed of sturdy plastic. On one side of…
A brown plastic rectangular instrument with two identical mercury thermometers marked in Fahrenheit side by side on its surface. Below the thermometers, a small glass…
A leather case contains an instrument. The instrument is housed in a plastic shell with a metal cylinder protruding from the top. The upper surface,…
An instrument consisting of a grey metal housing with a black metal tube protruding from it. On the top surface of the grey housing, there…