Published by the Mersey Docks and Harbour Board for the Liverpool Observatory, Bidston, Birkenhead.
"Regulations for testing the Thermal Adjustments of Marine Chronometers, and for the examination of other scientific apparatus at the Observatory at Bidston."
Includes a schedule of costs incurred for the testing of the following instruments;
Watches and Chronometers; Sextants, Theodolites and Compasses; Telescopes and Binoculars; Barometers and Aneroids; Thermometers; Miscellaneous.
pp. 7-11, Appendix. As to the Rating and Testing of Marine Chronometers.