[D8953AAO], Letter from Walbaum (W.H.) & Co to West Orange Laboratory, February 28th, 1889


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[D8953AAO], Letter from Walbaum (W.H.) & Co to West Orange Laboratory, February 28th, 1889

Editor's Notes

Referring to our letter of 26th inst. In regar to slag sent you for experimental separation we have heard from the Penna. Steel Co. that the slag marked "Cupola" is iron Cupola slag and Spiegel.##We have been infromed that 4% of Manganese when present as an alloy destroys the magnetic properties of iron and unless you specially desire to try it or doubt the accuracy of our information we will not send a sample of Spiegel slag until we hear from you.##The Penna. Steel Co. were unable to give us any data in regard to the chemical composition of the slags they sent me but are much intersted in the outcome of the experimet.##Of the materials sent we think the greatest practical benefit would be in successfully treating the Cupola and Pit or Ladle Slags as at present no attempt is made to utilize these as they go at once to the cinder bank.##The other materials are usually sent to the Blast Furnace and as the write was told a short time ago by a Mill Manager "the Blast Furnace is about as good a seperator as any yet invented.




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Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
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