A magnetical instrument constructed under his direction, which he proposed to call the "theodolite magnetometer".

Míreanna comhchosúla

• On an improved form of the theodolite magnetometer.
  de réir: Lloyd, Humphrey Rev
  Foilsithe / Cruthaithe: (1857)
• A new instrument for observing the magnetic dip.
  de réir: Lloyd, Humphrey Rev
  Foilsithe / Cruthaithe: (1845)
• On a new magnetical instrument, for the measurement of the inclination, and its changes.
  de réir: Lloyd, Humphrey Rev
  Foilsithe / Cruthaithe: (1840)
• Further development of a method of observing the dip and the magnetic intensity at the same time, and with the same instrument.
  de réir: Lloyd, Humphrey Rev
  Foilsithe / Cruthaithe: (1832)
• An attempt to facilitate observations on terrestrial magnetism.
  de réir: Lloyd, Humphrey Rev
  Foilsithe / Cruthaithe: (1832)