One block of wood
1790-1819
Magnetron block
1940
(Tapering) lead glass block
1990
Kofler block for determining melting points
Two brass pulley blocks by Adams
1762
Desk note paper block of imitation amber catalin
1948-1960
Block of slender wooden matches, United States, 1902
Semi-circular glass block (slightly chipped)
1900-1980
Block of gamma-ray protection glass
1897
Scribing block
Concrete block made from refuse, Colombia
1980-1989
Wooden Test Tube Blocks, X 4
1900-1980
Wooden Test Tube Blocks, X 4
1900-1980
Granite Block from Stone Boiler
Block of RW 26 glass irradiated at one end, 1968
1968
Knapping Block
Electrical connector
1930-1970
Rubber block holding 11 glass test-tubes
Wooden block used in rabbit ear chamber research
1950-1980
Joly photometer with ground glass diffusing blocks
Block of wood from North Eastern Railway
Two rebated mahogany blocks and seven steel screws
Wooden printing block
Concave iron block with crystal quartz attached
Rectangular glass block
1900-1980
Triangular mahogany block with triangular butterfly screw
Printer's illustration blocks illustrating a series of electron micrographs of the intima of blood vessels
Early hollow glass building block
Hand-cut curved wood block for rotary press
Cylindrical block with four vertical equidistant holes
Trimming block for the Sorvall Porter Blum MT2 ultramicrotome
Wooden Test Tube Blocks, X 4
1900-1980
UK5 solar array diode block
Three triangular keyway slotted mahogany blocks
Wooden block with metal spikes
1815
8 Track (1 inch Tape) Head Block for A80 Recorder
4 printing blocks showing x-rays of feet
Nozzle block
Corrugated Refractory Block for Lining Base of Blast Furnace
1958
Wooden Test Tube Blocks, X 4
1900-1980
Block with inclined ends, mahogany, brass
Two wooden blocks each with a wooden pulley sheave let in
Joisting block (Mitre template)
Rectangular glass block
1900-1980
Part of model illustrating roller transport
Ship's double block shell with sheave pin installed and shell shaped
Ship's rigging pulley block, with corners sawn off
Pulley block with three sheaves in line
1900-1983
Hand printing block
Pulley Block
1800