sentences:  The modifications to the projection room included enlarging the area into the rear of the circle so as to accommodate the new Phillips DP70- AAII projectors, the accompanying Mole-Richardson arclamps, Westinghouse Rectifiers and Phillips surround sound per-amplifiers.The MR arclamps only being used for 70mm presentations due to the need for greater light coverage on the larger screen area.For 35mm presentations, on a smaller area of the screen, the MR arclamps were swapped to the more reliable, more efficient Peerless Magnarcs.