Hematites of Jefferson and St. Lawrence Counties. 45 



until the deposit was exhausted a few years ago. The mine has been 

 dismantled. 



In the town of Antwerp there is a range of ore deposits owned by 

 the Jefferson Iron Company. They are, beginning at the south-west : 

 Colburn, Ward, Dickson, White and Old Sterling mines. The 

 company is working the Dickson and Old Sterling only ; the others 

 are idle. 



THE DICKSON MINE was first opened in 1858. It is 120 feet 

 deep, and worked wholly as an underground mine. The geological 

 relation of the ore is much the same as in the Old Sterling mine. 



THE WHITE MINE is a small pit on the White farm, between 

 the Dickson and Old Sterling. It has been idle for many years. 



THE OLD STERLING- MINE is one mile north-east of the 

 Dickson mine, and three miles from Antwerp. First opened by 

 George Parish in 1836, it has been in operation ever since. For 

 years it was in the possession of the Sterling family who used the ore 

 in their furnace, and refused to sell any of it. In 1869 it became 

 the property of the Jefferson Iron Company, which was organized 

 in that year. The open, pit at the north-east is 115 feet deep, and 

 approximately, 500 by 175 feet. The underground workings are 

 south and south-west of it, and the ore has been followed for a 

 distance of 900 feet, aud to a depth of 185 feet. This deposit lies 

 between the gneissic rocks on the south-east, 400 feet distant, and the 

 sandstone (Potsdam) on the west side of the mine, but no Avails have 

 as yet been reached in the mine. A serpentine rock occurs with the 

 ore, apparently without any order in its relations to it. The ore 

 varies from a specular ore of metallic lustre and steel-gray 

 shade of color to amorphous, compact masses of deep red. The 

 crushed powder answers well as a paint, and stains deeply all with 

 which it comes in contact. The chemical composition is shown by 

 the following analysis : 



Sesquioxide of iron 79.52 



Oxide of manganese 0.07 



Alumina _ 1.12 



Lime --- 2.49 



Magnesia — 1-07 



