Three metal tubes rise from a steel base; at the base of the tube is a projection for attaching a gas line; just above the…
Three metal tubes rise from a steel base. At the base of the tube is a projection for attaching a gas line. Just above the…
A black cardboard box with labels “Diverging Ray Attachment for Optical Disk”, “Manufactured by C. H. Stoelting Co., 39 W. Randolph St., Chicago, ILL”. The…
A wooden base with a 24cm coil mounted to it with brass strips which attach to two wood brackets and then to the base. There…
A metal tube rises from a steel base. Near the bottom of the tube is a projection for attaching a gas line. Directly above the…
A microscope contained in a wooden box. The horseshoe shaped base has an attached stand mounted on it. A hinge allows the backbone of the…
A metal tube is attached vertically to the steel base. Another smaller tube for attaching a gas line projects from the base of the main…
A metal tube is attached vertically to the steel base. Another smaller tube for attaching a gas line projects from the base of the main…
A metal tube rises from a steel base, with a projection just above the base for attaching a gas line. Just above the projection is…
A metal tube rises from a steel base, with a projection just above the base for attaching a gas line. Just above the projection is…