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2. Tripod (surveying) - Wikipedia

   en.wikipedia.org/wiki/Tripod_(surveying)

   This shows a surveyor's tripod's foot. The platform is used to push the spike into the ground. Above the foot is the height adjustment. The tripod is placed in the location where it is needed. The surveyor will press down on the legs' platforms to securely anchor the legs in soil or to force the feet to a low position on uneven, pock-marked ...

3. Level (optical instrument) - Wikipedia

   en.wikipedia.org/wiki/Level_(optical_instrument)

   The surveyor does this with the use of a bull's eye level built into the instrument mount. The surveyor looks through the eyepiece of the telescope while an assistant holds a vertical level staff which is graduated in inches or centimeters. The level staff is placed with its foot on the point for which the level measurement is required.

4. Tribrach (instrument) - Wikipedia

   en.wikipedia.org/wiki/Tribrach_(instrument)

   The device consists of two triangular metal plates connected at their corners by leveling thumbscrews, a bubble level, a locking mechanism and often an optical plummet. The centre of the bottom plate of the tribrach has a 5/8-11 UNC thread bolt hole which is used to attach the tribrach to the tripod. The top plate has three small holes or slots ...

5. Temporary adjustments of theodolites - Wikipedia

   en.wikipedia.org/wiki/Temporary_adjustments_of...

   Leveling of an instrument is done to make its vertical axis adjusted with respect to the apparent force of gravity at the station. For two spirit vials at right angles: Bring one of the level tubes parallel to any two of the foot screws, by rotating the upper part of the instrument.

6. Spirit level - Wikipedia

   en.wikipedia.org/wiki/Spirit_level

   A surveyor's leveling instrument has a spirit level mounted on a telescope (perhaps 30 power) with cross-hairs, itself mounted on a tripod. The observer reads height values off two graduated vertical rods, one 'behind' and one 'in front', to obtain the height difference between the ground points on which the rods are resting.

7. The 20 best gifts for parents of all ages - AOL

   www.aol.com/lifestyle/best-gifts-parents...

   We’ve put together a list of the 20 best gifts for parents of all ages, from the comfortable to the practical (a pill organizer), to the thoughtful ().They may not want anything, but we know ...