:70 under section 9a of the hatch act of 1939, this information was disseminated among the agencies of the government. our teachers do a great job for us and we need to show them that we appreciate their service. the tips we mentioned above are definitely not extensive. your ears will tell you if the string is indeed getting tighter, or if something is slipping and causing the pitch to suddenly drop, which should also warn you to stop before something slips and gives your guitar a nasty string burn. i am so jealous of your shelves! 