48 PHYSIOGRAPHY. 



Harmotome. 



vicinity of Mount Vesuvius. It is also said to occur very frequently in 

 amygdaloid, in Scotland. 



HATCHETINE. 



In the shape of flakes like spermaceti, or of granular masses like 

 bees-wax. 



Lustre slightly glistening and pearly, and of considerable de- 

 grees of transparency when in flakes, else dull and opake. Color 

 yellowish-white, wax yellow and greenish-yellow. 



Hardness, like soft tallow. Very light. Without odor or elas- 

 ticity. 



1. It melts below the boiling point of water. Ether dissolves it readi- 

 ly ; being evaporated, the solution yields a viscid, oily inodorous matter. 

 Distilled over the spirit-lamp, it gives a bituminous smell, a greenish- 

 yellow, butryaceous substance is disengaged, and a coaly residue re- 

 mains in the retort. At a lower temperature a light oil is distilled. 



2. It occurs in small contemporaneous veins with Quartz, Calcareous 

 Spar and iron-ores, at Merthyr Tydril in South Wales. It has been 

 described by Mr. BRANDE under the denomination of Mineral Jldipo- 

 cire. 



3. The description of Hatchetine agrees very nearly with the follow- 

 ing one given of Mountain Tallow. It has the color and feel of tal- 

 low, and is tasteless ; its sp. gr. = 0-6078, in its natural state, but is in- 

 creased by melting it, to 0-983, the air bubbles being driven off. It melts 

 at 118, and boils at 290. When melted it is transparent and colorless, 

 but becomes opake and white on cooling. It is insoluble in water, but is 

 dissolved by alcohol, oil of turpentine, olive-oil and naphtha, when hot, 

 but is precipitated when they cool. It does not form soap with alcaline 

 substances, but is combustible. It has been found in a bog, on the bor- 

 ders of Loch Fyne, and has been formerly noticed on the coast of Fin- 

 land, in one of the Swedish lakes ; near Strasburg, and in Scotland. 



HAUSMANNITE. (See Black Manganese.) 

 HAUYNE. (See Sodalite.) 

 HAYDENITE. (See Chabasie.) 

 HAYTORITE. 



A variety of Quartz, resembling Calcedony, in perfect crys- 

 tals, single and variously aggregated, and having the form of Da- 

 tholite, (-variety Humboldtite.) It occurs in detached pieces, ac- 



