Books with author Arvid Michael Levin

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

The importance of effecting the greatest possible improvement in the economy with which the national fuel-resources are ~J utilized will be apparent when it is considered that under existing conditions, and with the demands increasing at the rate they have since active coal-mining first became an established industry, the present estimated coal-reserve, about 2,000 billion tons, will have been absorbed before the end of the next century. The yearly consumption is now 500,000,000 tons and it is increasing at the rate of doubling itself every ten years. Of the total amount mined, so far, due to exacting requirements with regard to the quality of the marketable fuel, and due to wasteful methods of mining it, there has been left in the ground, inaccessible for future use, or wasted as unmarketable product, an amount even greater than that actually rendered useful. The portion of the fuel consumed for industrial purposes, for generating power, or for metallurgical use, which is by far, the I greater portion of the fuel actually rendered useful, has, according to modern standards, been utilized particularly inefficiently; but a tendency toward a strict reform in this respect is afoot, and the Jproblem at present is how to utilize, not only the energy in the good grades of fuel to the greatest possible extent, but also to find new ways for an effective utilization of inferior grades hitherto wasted. The gas-engine is looked upon as a means for effecting reform in the one respect as well as in the other, and, although the final development of the engine has probably not as yet been seen, its theory indicates at present how far an increased economy may be hoped for, just as the steam-engine theory, in the days of Watt, indicated the final limit for efficiency of the steam-engine cycle, toward which the actual performance of the engine has gradually, by steps, approac(Typographical errors above are due to OCR software and don't occur in the book.)

The Writing Lesson program offers you a never-ending supply of perfect writing exercises. Practice makes perfect and now the child can master all the letters or only those that he or she needs to improve. Print as many pages as you need. You will never need to buy another handwriting practice book. The program offers three diifferent writing styles: Primary, Script and Cursive. There are lower and upper case letters, common words and short stories. Start with Primary style suitable for children K-1, or wit Script for 2nd to 4th graders. Then go to Cursive once the student has mastered these basic writing skills. Requires Adobe Acrobat Reader 3.0. Mac and PC.

This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.

How often have you heard the question, "Why don't babies come with instructions?" Well now they do! This practical book offers busy parents and care givers quick, inexpensive, and exciting activities to do with their children. Each activity is specifically designed to be appropriate for the developmental stage. A bibliography of resources, books, and music is also included.