https://omeka.cloud.unimelb.edu.au/grainger/files/original/cfc156b86cf3f51e4f023782aa45b2f1.jpg 0abae86db0f5601731d57e18e437497e Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Tuning fork, A440 Hz, after 1920 Description An account of the resource This tuning fork was manufactured by Deagan. It is inscribed on the back ‘ J.C. Deagan. Official pitch of A.F. of M. 1917 Adopted by US Gov't. 1920’. J. C. Deagan, was a musician and expert in the science of acoustics. He wrote many papers on the subject and was a major campaigner for the standardisation of musical pitch in the USA. A standard (A= 440) was officially adopted in America in 1920 and eventually worldwide. Creator An entity primarily responsible for making the resource J. C. Deagan Inc., Chicago, USA (instrument maker) Source A related resource from which the described resource is derived Grainger Museum Collection Date A point or period of time associated with an event in the lifecycle of the resource after 1920 Identifier An unambiguous reference to the resource within a given context 00.0016