A really fascinating story in pictures of the preparation and manufacture of quartz crystals for radio communication. Dating back to 1943... how times have changed...
Copied from another list. http://archive.org/details/6101_Crystals_Go_to_War_01_20_16_21 73 Alberto I2PHD _______________________________________________ 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.
