Lesson Four

Lesson Four

Purpose: To determine your percent accuracy in listening for
resonance.
Materials: The SALT #1 and SALT #2 solutions you made
for Lesson One.
Method: Move the SALT #1 and SALT #2 labels to the
bottom of the bottles so you can not tell which bottle is which.
1. Turn the Syncrometer ON.
2. Start with the test switch OFF.
3. Mix the bottles up, select one at random, and place it on the
right plate.
4. Listen to the current.
5. Flip the plate switch ON and make your second probe.
6. Resonance indicates a SALT #1, no resonance indicates
SALT #2. Check the bottom. Remember to rest after the
SALT #1, whether or not you heard resonance.
7. Repeat steps 3 through 5 a number of times. Work toward
getting three out of three correct. Practice every day.
Trouble shooting:
a) If you repeat this experiment and you keep getting the
same bottles “wrong”, start over. You may have accidentally
contaminated or mislabeled the outside of the bottle, or switched
bottle caps.
b) If you get different bottles wrong each time, the plates
may be contaminated. Wash the outside of the bottles and rinse
with filtered water and dry. Wipe the plates very gently too, with
filtered water and dry. Or replace the plates.
c) If all the bottles read the same, your filtered water is
polluted. Change the filter.