Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.

This current and comprehensive book provides an updated treatment of molecular gas dynamics topics for aerospace engineers, or anyone researching high-temperature gas flows for hypersonic vehicles and propulsion systems. It demonstrates how the areas of quantum mechanics, kinetic theory, and statistical mechanics can combine in order to facilitate the study of nonequilibrium processes of internal energy relaxation and chemistry. All of these theoretical ideas are used to explain the direct simulation Monte Carlo (DSMC) method, a numerical technique based on molecular simulation. Because this text provides comprehensive coverage of the physical models available for use in the DSMC method, in addition to the equations and algorithms required to implement the DSMC numerical method, readers will learn to solve nonequilibrium flow problems and perform computer simulations, and obtain a more complete understanding of various physical modeling options for DSMC than is available in other texts.

"Drawing the Human Body: The Art of Figure Construction" is a book that no artist should be without. It touches a very important note in the art of figure drawing, basing the reason for its method of instruction on the idea that the beginner should be instructed in drawing the figure as a whole before studying detached parts; that the time employed in making strokes should be limited; that it is easier to draw the figure in action than half action; and that the action of the body may be expressed in nearly every instance by two main lines. "This book is intensely interesting, full of splendid illustrations, and is designed primarily for high schools and colleges, but is also invaluable to students studying from the model in the life class." - School Arts Magazine