Professor Emerson on HalVs Geological Collections. 565 



70. Graphite. 



Several large pieces of perfectly pure soft graphite; one also still inclosed 

 in quartz. In a bundle marked " (a) Azoic Kocks," by Ilall, with fragjnents of 

 Silurian limestones. 



77. BlOTITE. 



A large crystal 75 mm. long, 50 mm. wide, and 40 nun tliick, with irregular 

 sides. Adhering to one side is a portion of clear orthoclase, variety sunstone. On 

 another side another portion of the same feldspar contains many small wine-yel- 

 low Zircons. The crystal is also penetrated by i)lates 5-10 mm. broad, of a leek- 

 green mineral, brittle, with bronze luster and eminent cleavage. Under the 

 microscope it shows two cleavages at right angles and a third, prismatic, between 

 these, making an angle of 120° 45', and contains abundant inclosures arranged 

 l>aralled to the rectangular cleavages. These properties make it quite certain 

 that the mineral is diallage. 



Frobisher Bay. 



iron ores. 



78. Magnetite. 



Several i)ieces of magnetite in quartz ; one part of a large crystal with a 

 piece of iron slag and two pieces of limpid quartz. The label reads, "Much 

 like to a sea-coal in color. From Little Bay, Ek-ke-lu-zhun, on cape or point 

 where I found coal of Frobisher Expedition of 1578, Tues., Sept. 24, 'Gl. Hall." 

 The quotation below, from page 432 of Hall's Narrative, explains the above: 

 "Ek-ke-lu-zhun, Victoria Bay. Embedded in the rocks I found some heavy 

 black substances, larger and more numerous than any I had before seen. These 

 I concluded might be the ' stone like to sea-coal ' described by Frobisher in the 

 account of his voyages." 



79. Magnetite. 



A larger piece from the same locality — part of a large crystal in limpid 

 quartz. Label, " Like to sea-coal in color." Ek-ker-lu-zhuu. This label is written 

 on the 550th page of Little Dorrit. 



80. Magnetite. 



Large piece of pure crystalline magnetite. 

 Kuen-gum-mi-ooke. 



81. Magnetite. 



Three pieces like 80. 

 French Head, Field Bay. 



82. Magnetite. 



Three large pieces marked (a). 



