EDISON LABORATORY Edison National Historic Site West Orange, New Jersey Volume 1

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