Papers relating to the British Geodetic Survey, including comparisons of the Ordnance standard thermometer with other thermometers; a map of the Trigonometrical Points in the Lerwick area; a paper titled 'Notes on the proper method to be used for Reduction of the Grand Triangulation of the British Survey, by G B Airy'; prints of Airy's zenith sector in position for observing and in plan; a copy of a printed paper by Matthew Collins on Clairaut's Theorem; a printed paper by J.L. Murphy on the figure of the Earth; and a printed paper by C.W. Merrifield on spheroidal navigation, extracted from a booklet.