[D8845AGM1], Letter from Joseph L Colby to Thomas Alva Edison, December 3rd, 1888

Item

Abstract

"Memorandum for Mr. Edison: ### If Phorphorus could be brought down from .01 % to .50% value of ore would advance $.75 ### .01 to .025 % ### .01% to .012% ### .01 to .005 % ### Maganiferous Ores: ### We are separating by hand by picking out the large lumps so as to get ore thereby which runs 10% in maganese-this also improves the ore from which maganese is taken. Could we by some effort separate the maganese from the finely divided ore it, it would be a great advantage. ### Ore containing 10% manganese is to-day worth $5.75 ### 20% it would be worth 7.00 ### 25% it would be worth 7.50 ### 30% it would be worth 8.50 ### and the value of the ore from which maganese was so removed would be increased about 50 cents per ton. ### With the above data, it is difficult to make a definite statement of what expense we could afford to incur-it depends entirely in the degree of separation. I should say 50 cents per ton could be sent to accomplish even the lowest results above named." Yours truly, Joseph L. Cosby

Date

1888-12-03

Decade

1880-1889

Type

Identifier

D8845AGM1

Folder Set

D8845

Title

[D8845AGM1], Letter from Joseph L Colby to Thomas Alva Edison, December 3rd, 1888

Microfilm ID

123:1081

Publisher

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

Timestamp

December 3, 1888

Item sets