30 PERPETUAL CALENDAR, KEYLESS 96 31 COMPLICATED DITTO AND INDEPENDENT SECONDS 97 32 THE MERIDIAN WATCH 99 ESCAPEMENTS TO WATCHES. 33 THE VERGE ESCAPEMENT 78 34 THE HORIZONTAL DO. 79 35 THE DUPLEX DO. 80 36 THE LEVER DO. 81 37 THE CHRONOMETER DO. 83 BALANCES, ETC. 38 COMPENSATION BALANCE 85 39 OLD BALANCE CLOCK 108 40 CLOCK SPRING 109 41 RACK STRIKING WORK 113 42 BACK OF FRENCH CLOCK 116 43 CARRIAGE CLOCK 118 45 ENGLISH ORMOLU CLOCKS 120-22 46 TELL-TALE CLOCK 123 CLOCK ESCAPEMENTS. 47 CROWN WHEEL ESCAPEMENT 147 48 ANCHOR DO. 148 49 DEAD BEAT DO. 149 50 FRENCH SINGLE-PIN ESCAPEMENT 150 51 THREE LEGG'D GRAVITY DO. 151 52 DOUBLE DITTO DITTO 154 TURRET CLOCKS. 53 WELLS CATHEDRAL CLOCK 135 54 OLD ST DUNSTAN'S DO. 137 55 ST JAMES'S PALACE DO. 138 56 ST PAUL'S CATHEDRAL DO. 140 57 ROYAL FREE HOSPITAL DO. 141 58 MEMORIAL TURRET CLOCK DIAL 157 59 MODERN TURRET CLOCK MOVEMENT 164 60 " " HOUR WHEEL AND SNAIL 166 61 " " THE RACK 168 62 " " THE PENDULUM ROD 169 63 QUARTER OR CHIME CLOCK 171 64 GAS WHEEL FOR ILLUMINATED DIAL 172 65 NEST OF BEVELLED WHEELS CARRYING HANDS 173 66 HAMMER AND BELL 174 67 BENSON'S GREAT CLOCK. THE EXTERIOR 175 68 " " " THE MOVEMENT 176 69 SUN-DIAL 180 TIME AND TIME-TELLERS.