Publisher's Synopsis
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1907 edition. Excerpt: ...Here the thin walls consist of mere threads. Figs. 26 and 27 represent the appearance of thread-lace scoriae from Kilauea. The separate threads are very fine, being only from one-thirtieth to onefortieth of an inch in thickness. As can be seen, this form of scoriee have six-sided or hexagonal shapes. You can form some idea of the great lightness of such scorim when you learn that they contain only 1.7% of rocky material. From Dwww Manual of Gwlvau Indeed, they contain so a layer of volcanic glass only one inch thick, if blown out into scoriee, would be able to produce a layer sixty inches thick_ Another curious form some-times assumed by lava, especially in the case of Kilauea, is where the lava is spun out in the form of long silk-like hairs. This is called by the natives Pele's hair, after the name of their goddess. Inasmuch as the origin of this form of lava was at one time generally attributed to the ac-Fm"D"""_8M""""lfG'lW.... FIG. 27. THREAD-LAcE tion of the wind 1Il drawing out SCORE FROM KILAUEA thread-like pieces from the jets of lava thrown upwards from the pool, it will be interest-ing if its true cause is explained. Dutton, in his report on the Hawaiian 'volcanoes, refers to the formation of Pele's hair as follows: "The phenomenon of Pele's hair is often spoken of in the school books, and receives its name from this locality. It has generally been explained as the result of the action of the wind upon minute threads of lava drawn out by the spurting up of boiling lava. Nothing of the sort was seen here, and yet Pele's hair was seen forming in great abundance. Whenever the surface of the liquid lava was exposed during the break-up the air above...
