or Py 1 1 | | a | ne CALLS t fRATION saATDGE ee . vance | | OFF | m= sted : sroestia | Sern +t | \ Ree Peo iTbe J ote : | | | | | | eriCTated “~— 4 Fig. 2.4 Schematic Diagram of Recording Circuit Showing Strain Bridge, Bridge Balancing Unit and Recording Oscillograph ° — rae epee RRERrrr, . ~~ Ee ow errr wre —ee | | |