Cylindrical block with four vertical equidistant holes
Block with inclined ends, mahogany, brass
Two rebated mahogany blocks and seven steel screws
Early hollow glass building block
Hand-cut curved wood block for rotary press
Scribing block
Three triangular keyway slotted mahogany blocks
Rectangular glass block
1900-1980
Rubber block holding 11 glass test-tubes
Printer's illustration blocks illustrating a series of electron micrographs of the intima of blood vessels
Wooden Test Tube Blocks, X 4
1900-1980
Wooden Test Tube Blocks, X 4
1900-1980
Wooden Test Tube Blocks, X 4
1900-1980
UK5 solar array diode block
Wooden block with metal spikes
1815
Electrical connector
1930-1970
Two brass pulley blocks by Adams
1762
Block of slender wooden matches, United States, 1902
Granite Block from Stone Boiler
Block of gamma-ray protection glass
1897
Desk note paper block of imitation amber catalin
1948-1960
Wooden block used in rabbit ear chamber research
1950-1980
Concrete block made from refuse, Colombia
1980-1989
Block of wood from North Eastern Railway
T.C.C. block type 1 mfd. Condenser
Trimming block for the Sorvall Porter Blum MT2 ultramicrotome
Fifteen sample blocks of carbon compound
Kofler block for determining melting points
Semi-circular glass block (slightly chipped)
1900-1980
Rectangular glass block
1900-1980
Wooden Test Tube Blocks, X 4
1900-1980
Triangular mahogany block with triangular butterfly screw
Joly photometer with ground glass diffusing blocks
Concave iron block with crystal quartz attached
Block of RW 26 glass irradiated at one end, 1968
1968
Wooden printing block
(Tapering) lead glass block
1990
Joisting block (Mitre template)
Nozzle block
4 printing blocks showing x-rays of feet
Knapping Block
Corrugated Refractory Block for Lining Base of Blast Furnace
1958
Shoemaker's blocking pliers
Photo, radiograph through steel block 4.43" thick
1926
Contactor block from the incomplete electric clock movement
1840-1877
One hand-held commutator grinding block
Five 'Scaffixer' blocks, Jones' patent 1907 & 1910
Cylindrical wooden block with groove in its.
1880-1900