75 ER Il, SECTION 3 s which were mounted on the outside he transformer shelter. These receptacles 1 power to the station by way of portds. One 3/C #12 portable cord was infor the overhead lights. One 4/C #12 : cord was installed for six 120-volt, tase receptacles. One 3/C #6 portable is installed for a 120-volt, single-phase, receptacle (tagged instrument power). weather-proof 120,/208-volt, 3-phase, 60 ceptacle was mounted on the outside ‘all of the station. Power was provided receptacle by a 4/C #6 portable cord. 1” conduits were installed in the east the station to provide entrance for ten aluminum coax. Underground cables stalled from Stations 1611 to 1612. ver for the instrument load consisted of 120-volt, single-phase. No timing signals juired. ‘otal of 106 cubic yards of concrete was INS: SE: 1613 and 1614 Collimator Baffles Irene DOD-16 CIPATION: 23 'RUCTION: 1-25-56/4-22-56 copper radial wires which sloped to the ground at an angle of 81 degrees from the vertical, and which were anchored to 1’-diameter copperweld ground rods and clamps. Sufficient space existed under the main structure roof for a User-furnished trailer. A 12’ x 22’x 10 wooden building located adjacent to the station was built for use as a “Bogue” generator shelter. Power requirements consisted of two 25 KW, 120/208-volt, 3-phase generators and the User-furnished Bogue set. Four pair of timing signal wire were required. A total of 15 cubic yards of concrete was poured. STATION: PURPOSE: SITE: USER: CONSTRUCTION: 1810 Mirror Imaging Station Yvonne LASL 12-2-55/4-16-56 Station 1810 was utilized for mirror imaging and was located in Room B and part of Room D within Station 1310. Room D was divided by two wooden partitions 4 feet apart from wall to wall and floor to ceiling, with doors in the center. Room B was divided into three separate rooms: one isolated screen room 9-6” x 11’ with a 20,000 ohm resistant, a large instrument room, and a light channel room 2 feet wide the full length of Room B. STATIONS: 1811 thru 1816, 1819, 1818.01 thru .09, 1841 and Jne wall was located 170 feet and the PURPOSE: Spectroscope s in the face of these walls which coin- SITE: 3se stations were concrete baffle walls, and one 11’ long x 16’ high x 1 foot 30 feet from Station 23. There were six ith the six lines of sight between the point of Station 23 and the six detec- itions in Station 1612. No power or signals were required. A total of 14 cubic ‘concrete was poured. When thestations ured, 12-inch square blockouts were left collimator pipes in-order to give Station to settle. After waiting two weeks, 8-inch r pipes were grouted in and lined up 2 zero point on Station 23. IN: SE: 1630 Electromagnetic Measurements Bruce DOD-16 CIPATION: All Events "RUCTION: 3-27-56/4-28-56 1817.02 Measurements Yvonne USER: LASL PARTICIPATION: 24 CONSTRUCTION: 12-14-55/4-21-56 Basically this was a pipe array consisting of 16” vacuum pipe Stations 1811 and 1812; 24” vacuum pipe Station 1813; 12” vacuum pipe Station 1819; a beam splitting and turning mirror Station 1814; beam turning and focusing Station 1815; end point structure Station 1816; single pumping Stations 1818.01 through 1818 .09 and double pumping Station 1841. The pipelines were required to be pumped down to a vacuum of between 0.1 and .01 microns. Station 1811 was 16-inch-diameter pipe approxi- mately 4400 feet long which was led from Station 24 to Station 1810, a recording station in Room B of Station 1310. Station 1812 was 16-inch-diameter pipe approximately 4000 feet long which led from Station 1810 to a junction ition 1630 was an octagonal-shaped structure 32’ on a side x 15’-6” high. with the 24-inch pipeline Station 1813. 1 of plywood, covered with copper, and heavy layer of bitumastic paint. Around imeter of the roof there were soldered 24-inch pipe of Station 1813, approximately 860 feet long, led from the working point of les were open, and the roof was con- 102 The junction point designated Station 1814 con- tained a mirror which split a light beam. The Station 24, thence to this junction Station 1814