Correspondence regarding the loan of equipment to the Royal Observatory, including the following items:

Correspondence on the Bendorff Electrometer and Flame Collector.

Correspondence on the 45° astrolabe.

Correspondence on a coil magnetometer.

Correspondence on a 6-inch 45-foot focus lens loaned by J. Worthington of California.

Correspondence on the loan of the Cookson Floating Zenith Telescope by the Cambridge Observatory Syndicate, 1911-1917.

Correspondence on the return of the 6-inch speculum mirror lent by the Revd Father Cortie of the Stonyhurst College Observatory, 1920.

Correspondence on the loan of a theodolite by Troughton and Simms Ltd, 1914.

Correspondence on the loan of a twin lead and table telephone instrument by the Research Department, Royal Arsenal, 1915-1916.

Correspondence on the loan of a Bendorff Electrometer and two Kelvin and White Electrostatic Voltmeters from the Physical Laboratory, Edinburgh, 1916.

Correspondence on the loan of a range-finder by the Admiralty, 1916.

Correspondence on the loan of a solar micrometer from Professor H.F. Newall, 1916.

Correspondence on the return of a barograph to Messrs Negretti and Zambra for adjustment, 1920, the instrument having been loaned to the Royal Observatory prior to purchase.

Correspondence on the loan of a wedge-shaped piece of glass by Adam Hilger Ltd, 1920.

Correspondence on the loan of a amplifier, syntoniser and valves by the Air Ministry, 1920.

Correspondence on the return from the Science Museum, South Kensington, of an instrument for practising the taking of observations of the transit of Venus, 1920.

Correspondence on a coelostat lent by the Joint Permanent Eclipse Committee and sent to the National Physical Laboratory for investigation, 1921.

Correspondence on the return of the quartz fibre vertical force magnetograph lent by Professor Watson to the Air Ministry, 1921.

Correspondence on the loan of Leclanche cells by the Department of Scientific Research and Experiment, 1921.

Correspondence on the testing of the Burndept Ultra 111 Receiver, 1921.