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