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Rh The interruption in building operations thus occasioned was followed by a short period of comparative inactivity, after the return of the people. The foundations were uncovered; but, before the resumption of stone-laying, it was found that the rubble overlying the foundation proper and immediately under the flagstone layers seemed to have less stability than was required; and straightway both flagging and rubble were removed. Stone of best quality was substituted, and the work of actual construction was continued with renewed energy. The reconstruction was a work of years.

The temple enclosure was for a brief period the communal center of mechanical industry,—the one great work-shop of the intermountain commonwealth. The Church had established there its public works, comprising a power plant in which the energy of City Creek was harnessed to the wheel, air-blast equipment, iron foundry, and machine shops for the working of both wood and metal. Much of the work here done had no connection with the extensive building operations on Temple Block.

Beside the interruptions and delays already noted, other hindrances were inevitable, and, under the best of conditions progress could be but slow. Not until years after the "move" incident to the entrance of the federal soldiery, had the material of the main structure been decided upon. As far back as the October conference of 1852 the question of material had been considered. Oolite