“…Included here are: devices based on standard analytical balances, as illustrated in Figure 3.4a (Hill 1970;Rooney 1973); electromagnetically compensated null-deflection devices (Farmery & Whittingham 1978); strain gauge instruments (Chivers et al 1989); and compensated Cartesian divers, as shown in Figure 3.4b (Shotton Chivers et al 1993). From the point of view of their acoustical behaviour (i.e.…”