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Gauge Stuff

This is chiefly with a concrete formed of fine wrought and used for mouldings and cornices which are cast iron filings and Portland cement. The run or formed with a wooden mould. It con- Abbé states that a cement made thus is hard sists of about plaster of Paris, mixed grad- enough to resist any attempts to fracture it. ually with fine stuff. (See No. 2198. ) As he states that the iron filings are to replace When the work is required to set very expe- the sand usually put into the mixture, we ditiously, the proportion of plaster of Paris is presume that the relative quantities are to be increased. It is often necessary that the similar.