Download Hawallan Annual for 1922 PDF Books
By:"Thos G. Thrum"
Published on 2018-02-05 by Forgotten Books
Excerpt from Hawallan Annual for 1922: The Reference Book of Information and Statistics Relating to the Territory of Hawaii Inasmuch as the kinds of minerals and glass that are present in a rock depend ultimately on the chemical compo sitiou of the original, subterranean magma, or Of the lava as it issues from the volcano, we must consider the chemical composition Of the rock as its most fundamental character. We can arrive at some knowledge, a rough approximation, Of the main features of the chemical composition of a rock by study of the minerals that compose it, but for exact knowledge we must resort to chemical analysis, a rather lengthy and complex procedure, but one that is necessary for the proper study of rocks. All igneous rocks, lavas included, have certain chemical characters in common. They are all composed in great part of silica, this oxide forming from one-half to three-quarters of nearly all igneous rocks. With this are combined (forming minerals) several other oxides, the chief Of which are: alumina, two oxides of iron, magnesia, lime, soda, and potash. These seven oxides with Silica and a little water, make up 98 per cent of the known rocks Of the globe. A considerable num ber of other oxides and elements may be, and usually are, present, but in relatively very small amounts. The chemical differences between the various kinds of rocks are manifested in differences in the relative proportions of these several chem ical constituents. Thus some rocks may contain 75 per cent of silica and others as low as 40, one may have 20 per cent of lime and another none, and so on, in many possible variations. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
This Book was ranked 33 by Google Books for keyword Reference Statistics Book.
Download Hawallan Annual for 1922 PDF Books Free
Download Hawallan Annual for 1922 PDF Free
Download Hawallan Annual for 1922 Books Free
Download Hawallan Annual for 1922 Free
Download Hawallan Annual for 1922 PDF
Download Hawallan Annual for 1922 Books
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