. American foundry practice . ferent sized cupolas, see pp. 301-320, Vol. II. Good management in melting iron is only indicated to theobserver by the amount or weight of iron or fuel used incharging up a cupola, and the time consumed in information is good as far as it goes. A man know-ing this much, if he had the cupola prepared, could chargeit up and melt iron, and have a reasonable success so longas the grade of iron, fuel, and working conditions did notchange. It is more difficult to prepare a cupola properly than ispopularly thought. The first thing a cupola man generallydoes
. American foundry practice . ferent sized cupolas, see pp. 301-320, Vol. II. Good management in melting iron is only indicated to theobserver by the amount or weight of iron or fuel used incharging up a cupola, and the time consumed in information is good as far as it goes. A man know-ing this much, if he had the cupola prepared, could chargeit up and melt iron, and have a reasonable success so longas the grade of iron, fuel, and working conditions did notchange. It is more difficult to prepare a cupola properly than ispopularly thought. The first thing a cupola man generallydoes in the morning is to put away his ladles and shanks, etc.,and if he has any helpers they may assist him, or be gather-ing the scraps and gates. Some places will jingle theirsmall gates so as to cause the cupola to melt faster andcleaner. After all the tools are put by, the melter will begetting the ladles ready, while the helpers are getting thecinders away from the cupola, and mixing the clay for him. ^^EPAKING CUPOLAS. 317. • ;..•;.•••.•••••*•??. • ••*.!*:••.• ••!».!! !!:.* CUPOLA WITH MELTEP PORTION DAUBED UP, 318 PREPARING CUPOLAS. Next the melter will go inside the cupola and pick it out witha small, sharp pick, being careful not to break or disturbthe face of the bricks, for if they can be left with the thin,glossy skin or cinder formed upon the surface of the brickby the use of the fluxes and from the heat, it will oftenstand the fire and blast better than some of the clays the cupola is picked out it must be daubed, and indoing this many melters think the melting point, or thatpart of the inside that gets burned out, should be filled upso as to be level with the rest of the inside; but this shouldnever be done. In looking at the cut shown herewitli, there is seen oneside of the melting portion daubed up, so as to fill up allthis burned or melting surface even with the upper and lowerparts. This is one cause for cupolas
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