Old Survey Instruments

Old Survey InstrumentsOld Survey InstrumentsOld Survey Instruments
  • Home
  • Theodolite Gallery
  • Level Gallery
  • Mounted Compass Gallery
  • Hand Compass Gallery
  • Drafting Gallery
  • Clino Gallery
  • Survey Cross Gallery
  • Misc Gallery
  • Tripods Gallery
  • Chains Gallery
  • More
    • Home
    • Theodolite Gallery
    • Level Gallery
    • Mounted Compass Gallery
    • Hand Compass Gallery
    • Drafting Gallery
    • Clino Gallery
    • Survey Cross Gallery
    • Misc Gallery
    • Tripods Gallery
    • Chains Gallery

Old Survey Instruments

Old Survey InstrumentsOld Survey InstrumentsOld Survey Instruments
  • Home
  • Theodolite Gallery
  • Level Gallery
  • Mounted Compass Gallery
  • Hand Compass Gallery
  • Drafting Gallery
  • Clino Gallery
  • Survey Cross Gallery
  • Misc Gallery
  • Tripods Gallery
  • Chains Gallery

 

Making Cross Hairs from a Spider Web.

Several of my 100 plus years old instruments still have the original cross hair spider webs intact.

Spider webs were also used in artillery gun sights during WW2 as they were less susceptible than wire to breaking under constant vibration. 


See the pages below from an old text book.