Derivation of the Word “Theodolite”

@article{MelvillDerivationOT,
  title={Derivation of the Word “Theodolite”},
  author={E. H. V. Melvill},
  journal={Nature},
  volume={81},
  pages={517-518}
}
ALTHOUGH the etymology of the word theodolite has been discussed from time to time1, no satisfactory solution has hitherto been established. It was first used in England, and the earliest reference to it is contained in a book by Leonard Digges (completed and published by his son, Thomas) called “Geometrical practical treatize, named Pantometria, diuided into three bookes, longimetria, planimetria, and stereometria, &c.,” first published in 1571, with a second edition in 1591, wherein the…