Book of the Week
by David Anderson (-D.A.)

     c1922, Mid-March


A Unique "Book of the Week" Book Review:  "The Theory of Relativity" by David Anderson

Unique! - Beyond Rare!!!

"About as Cool as it Gets..."

The Text        

 

EXCERPT:  "What is the Einstein theory? and what does it claim?  From the time of Pythagoras and Zeno in the Greek cities of Asia and Italy down to the present time scientific men have been discussing whether space is finite or infinite, whether there is any difference between rest and motion, whether length is absolute or relative, whether time and space have any real existence.  The result of these discussions has added to our knowledge of mathematics and physics.  But the boldest attempt to answer these problems was made by Albert Einstein in 1905 when he propounded his theory which later has commanded the attention of the world. 

"Einstein's two great postulates are: That all motion is relative, and that the velocity of light is independent of the motion of its source.  The first of these can be easily understood by the example of riding in a smoothly moving train with the windows darkened so that we could not see the passing landscape outside, and the other that nothing can travel faster than the speed of light which travels at a rate of 186,000 miles a second [670,000 miles per hour], and that it cannot be made to travel faster by giving it a quick send off.   These two primary postulates with his later "Principle of Equivalence" are claimed to have cleared away several of the riddles of the universe.

"The effect of these principles is that all three of Newton's laws of motion are questioned, and the Euclidean proposition that parallel lines cannot meet is denied.  Einstein declares the lines may meet.  Newton held that the action of gravity at a distance is instantaneous through all space, while Einstein holds that no action can exceed the velocity of light.  Another of the paradoxes of the Einstein theory is that there can be no such thing as absolute time nor can there be any way of finding whether clocks in different places are synchronous.  Yardsticks may vary according to how we hold them, and weight ["more correctly, mass" -EW] depends on velocity.  He also shows that the shortest distance between two points may not be a straight line.   These have been deduced from mathematical laws governing physical phenomena, and capable of experiment.  The result of experiment has been to confirm the theory in two crucial tests.  The third test ["Gravitational redshift" -EW] yet remains to be made.1"

-David Anderson (-D.A.), "Book of the Week: The Theory of Relativity", c1922 (estimated Mid-March, 1922)

Note: David Anderson was also the owner of this 1st Edition copy of Einstein's "Relativity" in which this book review was pasted and preserved on the rear inside cover.

F O O T N O T E S

1-"the effect was eventually considered to have been finally identified in the spectral lines of the star Sirius B by W.S. Adams in 1925" -http://en.wikipedia.org/wiki/Gravitational_redshift"

 

 by David Anderson (-D.A.), "Book of the Week: The Theory of Relativity", c1922 (estimated Mid-March, 1922)