‘valves’ historical pictures (exact matches)

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A Star-Fish opening an Oyster, a tug-of-war where the odds are on the Star-fish
A Star-Fish opening an Oyster, a tug-of-war where the odds are on the Star-fish
The Agricultural Exhibition at Kilburn
The Agricultural Exhibition at Kilburn
Two Starr-Edwards artificial cardiac valves, United States
Two Starr-Edwards artificial cardiac valves, United States
The Northumberland Prize Life-Boat
The Northumberland Prize Life-Boat
The heart, its cavities and valves
The heart, its cavities and valves
The Transmitting Valves of the Marconi Station at Carnarvon
The Transmitting Valves of the Marconi Station at Carnarvon
Works of the "Leviathan" Engine
Works of the "Leviathan" Engine
Lee de Forest
Lee de Forest