nufacture as in other industries.— since it is closed up, and the anhydride describes a com- ——_—» + 0+ Pot. and Glass. Reporter. plete cycle at cach operation. The duration of the initial HYDRAULIC PUNCHING MACHINE. change of sulphurous anhydride is indefinite. In practice 2+ 0 +e The engraving… … burner. The latter has to be replaced every forty or-fifty As will be seen, the quantity of fusible matter such as HYDRAULIC PUNCHING MACHINE, hours. A modification of the platinum burner is also pro- iron, etc., is very small indeed, if any. Under the fire treat- vided for replacing the chalk…
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