THRESHOLD COMPLEX EXPLORATION LOG
Designation / Log ID: 51-V48
Apparent Date/Time: 26 September 2026 / 08:14 (local) — secondary stamp reads 03:02 11 November 1961
Entry Method: Single steel door marked “C-52 CLOCK GALLERY – AUTHORIZED TIMEKEEPING ONLY”. Exterior clear aperture measures 0.89 m × 2.04 m. Interior aperture measures 1.07 m × 1.91 m on entry and 0.82 m × 2.21 m on exit.
Environmental Baseline
Lighting: fluorescent tube fixtures, color temperature measured at 3980 K. Intensity constant at 54 lux.
Ambient temperature: 18.4 °C. Humidity: 41 %.
Background sound: continuous low-frequency gear train at 52 Hz. Baseline reading 19 dB.
Air movement: none detected. Barometric pressure 1013.4 hPa on entry; 1006.8 hPa after 3.2 m of travel.
Spatial Observations
Gallery estimated 31 m long by 7.8 m wide by 3.2 m high. Laser measurement returns 21.6 m long by 6.9 m wide by 2.7 m high.
Floor: vinyl composition tile with painted centerline. Line width measures 82 mm. Surface remains uniform under repeated contact.
Walls: painted cinder block with twelve wall-mounted clock faces. Paint thickness measures 0.5 mm. Surface remains uniform under repeated contact.
Ceiling: suspended acoustic tile with sixteen fluorescent fixtures. Fixture count remains sixteen after seventeen visual inventories.
Repeating motif: every 2.8 m a pendulum case occupies the north wall. Case height measures 1840 mm. Case glass is identical across all units.
Anomalies
Visual inventory of wall-mounted clock faces returns 12. Physical inventory returns 12. Measured second-hand occupancy equals 0 while calculated residual occupancy across the same faces equals 9.
Floor remains level under spirit level. Measured residual film on the lower wall panels slopes 2.1° toward the outbound wall. Slope reverses after 5 minutes of continuous observation without change in physical orientation.
Posted mains-frequency plaque reads 60.00 Hz. Measured combined drive current at all clock motors equals 0.0 A. Seal integrity lights on the fire door remain green.
Sound of residual chime arrives 3.1 seconds after the corresponding surface disturbance is detected. Delay increases by 0.24 s for every additional 1.3 m of distance from the entry door.
Humidity at mid-gallery remains 41 % while residual film forms on the centerline edges after 7 minutes of observation. Film disperses without measurable change in local humidity.
Local magnetic field strength measures 0.4 gauss at floor level and 2.2 gauss at 1.5 m height. Field direction reverses after 6 minutes without change in gallery state.
Master-clock second-hand count on the status array decreases by 18 over 8 minutes while measured mains current at all motors remains 0.0 A.
Surface of residual film on centerline edges exhibits electrostatic cling of 4.1 cm against vertical surfaces. Cling collapses after 41 seconds without measurable change in surface charge.
Centerline migrates 13 mm toward the inbound wall over 6 minutes. Line returns to original alignment without measurable change in floor temperature.
Pendulum-case depth measures 280 mm on first inventory and 214 mm on second inventory of the same case. Case returns to 280 mm on third inventory without change in fixture position.
Clock-face diameter measures 410 mm on first inventory and 368 mm on second inventory of the same face. Face returns to 410 mm on third inventory without change in mounting height.
Recorded tick interval equals 1.00 s on the first 40 cycles and 0.73 s on the subsequent 40 cycles. Interval returns to 1.00 s without change in gear-train state.
Entity Notes
None observed.
Exit / Continuity Status
Exit achieved through the same steel door after 44 minutes of observation. Exterior aperture on exit measures 0.82 m × 2.21 m. Residual film on boots dissipates within 11 minutes of exit. Local magnetic field returns to baseline 0.4 gauss within 13 minutes. No further residual effects recorded.