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Most conspicuous feature of a planetarium is the big, dumbbell-shaped projector. These are manufactured exclusively by the Zeiss works in Jena, Germany. The cost of such projectors varies with the rate of exchange; Pittsburgh got its instrument for $133,000. The building will cost $1,070,000, will seat 450 in the projection room, 250 in a lecture room. Sculptor Sidney Waugh of Manhattan is carving lo-ton limestone pedestals symbolizing the heavens, the earth, day and night.