Method of observing the altitude of a celestial object at sea at night-time or when the horizon is obscured.

Míreanna comhchosúla

• A description of a reflecting level or an artificial horizon for taking altitudes of the celestial bodies, etc., on land by Hadley's Quadrant with some remarks on different levels. With 1 plate.
  de réir: Little, James Rev
  Foilsithe / Cruthaithe: (1800)
• Useful methods in teaching elementary physics.
  de réir: Joly, J.
  Foilsithe / Cruthaithe: (1894)
• Method of determining the absolute dilatation of mercury.
  de réir: Joly, J.
  Foilsithe / Cruthaithe: (1907)
• On a method of photography in natural colours. With 2 plates.
  de réir: Joly, J.
  Foilsithe / Cruthaithe: (1896)
• A method of computing astronomical refractions for objects near the horizon.
  de réir: Brinkley, John Rev
  Foilsithe / Cruthaithe: (1817)