mounting his samples this fashion, Edison could
test for fading well monitor the adhesion the paint onto the surface the
strips. Figure shows
electrolytic equipment used storage battery work the main table, and on
adjoining tables are the microscopes used examine the minute grooves disc
and cylinder records.
GLASS BOTTLES, large
(on table)
Figure 20.
CHAIR Figure 20. Reproduce.Balance Room.
Object and Location Evidence Recommendation
South Wall:
CUPBOARDS with glass
doors (southwest section of
wall)
Figure 20.
WIRES and BULBS (hanging
from ceiling)
Figure 20.
The items shown hanging over the west wall figure are assumed paint
samples metal strips. Use existing cupboards. The mica samples were used make
up the thin diaphragm that vibrated with the movement sound waves. EDIS collection.
PAINT SAMPLES metal
strips (hanging over counter)
Figures and 25.
SIDE TABLE Figure 20. This
room also contained the precise balances used the measurement chemicals. Acquire. EDIS collection acquire. Use EDIS 21385.
CONTAINER, tin (on table) Figure 20.
LAB TABLE center of
room)
Figure 20. EDIS collection. Acquire.
201
.
Experimental BATTERY
STAND (on table)
Figure 20. EDIS collection acquire. Use EDIS 3333e. EDIS collection.
BEAKERS, (on table) Figure 20. The laboratory notebooks these tables refer to
experiments with record blanks and the assembly and testing the diaphragms
used the cylinder and disc phonographs.
West Wall:
COUNTER (against west
wall)
Figure 26. According photographic evidence, the balance room appears to
be the place where Edison did much his experimenting
