Another nice example of "before there were frequency counters": "Methods of using standard-frequency radio transmissions", 1934
http://tf.nist.gov/general/pdf/2423.pdf "Recent developments in precision time-keeping", 1934 http://leapsecond.com/pend/pdf/1934-Tomlinson-Recent-Developments-Timekeeping.pdf via http://adsabs.harvard.edu/full/1934Obs....57..189T /tvb _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.