ELlZ.\BKTnTO\\ X AND PORT HCXRV (J rADR-\ XGLES I57 



syenites. In the sedimentary gneisses they also do not fail, and 

 at times are veiy abundant. They are rich in the hill just east of 

 iMoriah Center and north of the Port Henry road and are of a 

 pale pink. The commoner variety in the other rocks is deep red. 



Graphite is widespread in the Grenville limestones and in the 

 thin associated quartzites, but does not seem abundant enough to 

 mine in any observed locality. In the quarries north of Port 

 Henry and in the coarsely crystalline calcite it sometimes exhibits 

 sharp hexagonal crystals of diameters a quarter of an inch and 

 less: In the pegmatite streaks it is coarser, but is seldom regular 

 in outline. 



Hematite, pseudomorphic after magnetite occurs in the pegma- 

 tite of the *' 21 " mine. It is really martite, and retains the shape 

 and cleavage of magnetite, while having a red streak. Some tabular 

 masses of specular ore were met years ago at Fisher hill and were 

 given the writer by E. B. Durham E. ]\I., then engineer for the 

 mining companies. 



Hornblende, scr Amphibole. 



Hypersthene, sec Pyroxene. 



Ilmenite appears of massive character mingled with magnetite 

 in the titaniferous ore bodies, but thus far no good crystals have 

 been discovered. These ore bodies are almost barren of good 

 crystals. 



Jasper has been afforded by a little vein in the ]\Iiller pit, ]\Iine- 

 ville. The quantity was small. 



Lanthanite was found in 1858 by AV. P. Blake in association 

 with the large allanites of the Sanford pit, ]\Iineville, now called 

 Old Bed. It formed small crystalline plates and probably resulted 

 from the alteration of the allanite [Am. Jour. Sci. Sept. 1858. 

 p. 245]. 



Magnetite possesses especial interest not only from the great 

 quantity which is available for mining but because in a large lense 

 of ore developed in the early nineties in the Lovers pit slope of the 

 Barton Hill mines, remarkably perfect crystals of this mineral ap- 

 peared. The containing ore to the amount of 40,000 tons averaged 

 over 68 per cent iron and carload lots ran yz. The crystals were 

 buried in the granular ore and, as this crumbled readily, they were 

 easily freed. AMiile the greater number were more or less imper- 

 fect from the interference of neighboring crystals or granules with 

 their growth, there were found from time to time others up to an 

 inch on the edge of the octahedron wdiich were almost perfect. 

 The faces of practically all the crystals are smooth and brilliant. 

 The common forms were the octahedron with the rhombic do^'ec- 



