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6 résultats pour : plumb line

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A builder using a plumb line to keep a walk vertical
ARP23A16_063

A builder using a plumb line to keep a walk vertic...

The use of a plumb-bob to keep a dry stone wall vertical as it is built
ARP23A16_064

The use of a plumb-bob to keep a dry stone wall ve...

Using a quadrant with a plumb bob to calculate the height of a tower by triangulation
ARP15A00_384

Using a quadrant with a plumb bob to calculate the...

Observers using a refracting telescope
ARP07113_010554P

Observers using a refracting telescope

Method of using quadrant fitted with a plumb line
ARP07105_460001576

Method of using quadrant fitted with a plumb line

Method of using quadrant fitted with a plumb line
ARP07105_460001577

Method of using quadrant fitted with a plumb line