The Scientific American Boy; Or, The Camp at Willow Clump Island
Chapter 7
SURVEYING 73
The Surveying Instrument. Spirit Levels. The Tripod. Surveyor's Chain. Surveyor's Rod. A Simple Method of Surveying. Mapping the Island.
The Scientific American Boy; Or, The Camp at Willow Clump Island
SURVEYING 73
The Surveying Instrument. Spirit Levels. The Tripod. Surveyor's Chain. Surveyor's Rod. A Simple Method of Surveying. Mapping the Island.