Through the pour, the vertical accuracy of the tower was maintained by comparing the slip form's location to massive plumb bobs hanging from it, observed by small telescopes from the ground.
22.
Once the corn was near 10 feet tall, Fulton and his assistants proceeded to knock out a perfect 60-foot orb in the cornfield, using a ladder and a giant makeshift plumb bob.
23.
Prindall's fellow dowsers credit him with having pinpointed more than 2, 000 wells _ some with a forked stick, some with a plumb bob, some with just a pencil and a map.
24.
This slope would probably have been accurately applied during construction by way of'A frame'shaped wooden tools with plumb bobs, marked to the correct incline, so that slopes could be measured out and checked efficiently.
25.
Allow the line to hang free until the weighted plumb bob down near the floor stops swinging, then pull the string tight while holding the plumb bob steady at the bottom with one hand.
26.
Allow the line to hang free until the weighted plumb bob down near the floor stops swinging, then pull the string tight while holding the plumb bob steady at the bottom with one hand.
27.
A plumb bob may be in a container of water ( when conditions are above freezing temperatures ), molasses, very viscous oils or other liquids to dampen any swinging movement, functioning as a shock absorber.
28.
Because we have the moon, sun, and planets, each with their own gravity, and these objects move in relation to the earth, one would expect " down " as given by a plumb bob to vary.
29.
A : The simplest way to draw a vertical line that is absolutely plumb is to snap a chalk line on the wall by using a plumb bob and length of chalked line as shown here.
30.
The equipment is straightforward : containers ( usually leather bags ), ropes, reels to raise the container to the surface at the shaft head, hatchets and shovels for excavation, lights, spirit levels or plumb bobs and string.
