Not long ago, we came across a first edition copy of Samuel A. Nelson's The A B C of Stock Speculation, copyrighted in 1902, and published as Volume V in Nelson's Wall Street Library series.

The book is significant because it collected a number of the columns that Charles Dow, the originator of the Dow Jones Industrial stock market index, had originally published in the Wall Street Journal on the subject of how to analyze stock prices to determine the best times to either buy or sell shares of stock.

Published after Dow's death, it was the world's introduction to what would become known as a result of the publication of this book as Dow Theory, which has proven to be amazingly influential and is still being actively applied by a number of stock market analysts today. Here is Barnes & Noble's overview for the 2007 reprint of the book:

"Speculation is a venture based on calculation."

First published in 1903, The ABC of Stock Speculation is a landmark achievement for the profession of stock speculation. This book not only established our modern view of the fundamentals of speculation, it did so through the precise and insightful writings of Charles H. Dow, coined in this book as Dow's Theory.

Nelson, friend and admirer of Dow (first editor of the Wall Street Journal and co-founder of the Dow Jones Industrial Average), sensed that Dow had developed a philosophy, some say subconsciously, which speculators and businessmen could adapt as a reliable guide for conducting their financial operations. After failing to persuade Dow to write his own book, Nelson spent long hours researching the Wall Street Journal for the most exceptional Dow editorials, 15 of which he included in this book.

It has been over 100 years-yet even in today's tech-heavy, volatile markets, the basic components of Dow Theory, technical analysis, price action, and market philosophy, still hold true. Nelson says it best, "Men rather than markets differ."

Needless to say, the book has been amazingly influential over the years and is still in print. You can buy your own modern copy via Amazon.com ($0.99 for the Kindle edition, $28.91 for Hardcover or $12.15 for paperback). Or you could read a scanned copy of the original edition online for free at the Internet Archive's openlibrary.org or via Google's ebook edition.

But when published in 1903, the book sold for $1.50, which in terms of the purchasing power of the dollars of 110+ years later, works out to be about $41.00. In 1907, a copy of the book could be purchased for less than half that, for $0.60, which surprisingly corresponds to purchasing power of $38.40 in the terms of today's dollars.

Today, a first edition copy like the one pictured above can have asking prices of anywhere from $350 to $650 depending upon how well it has held up over time. And for what it's worth, based on its condition, our original edition would fall somewhere in the middle of that range.

We see then that the price in dollars that one might pay to learn Dow's Theory in his own words ranges anywhere from $0 to $650.

So how much is Dow's Theory worth?

If it is just the words, you can have them for the price of an Internet connection and whatever electricity you consume as you review them or the price of whatever modern physical edition of the text that you might choose to purchase. If it is the first edition of the book that is what is valuable, then the question gets a lot more difficult to answer as you might consider it an investment worth speculating in as the value might rise or fall as time progresses.

Since that would mean that the problem has been reduced to a speculative calculation, could you use Dow's Theory to answer the question? And if you cannot, just how much is Dow's Theory worth?

What if you could hack your brain to boost your IQ? Would you do it? How can you do it?

Garth Sundem, author of Geek Logik, one of our all time favorites, is back in print with Beyond IQ, which taps the expertise of today's top researchers in psychology for how to expand your mental abilities.

And all you need to get started is this book, a 9-volt battery, a couple of wires, a 2 milli-Amp resistor and two moist sponges to attach to your head and your left arm....

Seriously! At least if you're as serious as the U.S. Defense Advanced Research Projects Agency (DARPA), which has used a device that's just a little more sophisticated than the one you could make yourself using the parts we listed above, which just happens to have the capability of doubling the speed at which military recruits learn to recognize and neutralize threats in DARPA's combat simulations.

More seriously, you have to jump ahead to Chapter 6 to get to the part of the book that describes how and why you might want to try that sort of thing out, but that brings us to something else that we've learned in reading Garth's books. You don't have to read them from front to back - in fact, they're often better if you skip from one chapter to another in no particular order, since they often stand on their own.

That reading approach really works well with Beyond IQ because Garth often presents brain-stretching exercises after a short discussion of the main concept in each chapter, where we suggest skipping over the exercises to read the snippets of insights presented at the end of each chapter, then coming back to the exercises when you really want to take a deep dive into a particular concept.

In putting the book together, Garth interviewed over 35 scientists doing real world research into the potential for getting more and better performance out of the human brain and the book also works well as a general introduction into the current state of the art in intelligence research. And in fact, a number of the exercises presented in the book are taken directly from their professional journal papers.

Highly recommended. You'll get smarter if you read it!

Previously on Political Calculations

Tools and posts inspired by Garth Sundem's Geek Logik:

• What Are the Chances Your Marriage Will Last?
• Picking the Right Date for Valentine's Day
• The Indisputable Inter-Age Rule for Dating
• Men: What's Your Sex Appeal?
• Men: Are You Old Enough to Propose Yet?
• Should You Become Intimate with a Coworker?
• Is Your Personal Grooming Adequate?
• How Much Should You Spend on Gifts this Christmas?
• Should You Keep Your New Year's Resolution?
• Should You Call in Sick?
• Five More Minutes?
• Are You Too Good for Your Job?
• Should You Buy Something (or Not)?
• How Many Cups of Coffee Should You Drink This Morning?
• How Many Beers Should You Have at the Company Picnic?
• Earth Live: Walk, Bike or Drive?
• Should You Say It on the Grapevine?
• Should You Start or Stop Procrastinating?
• Should You Apologize?
• Should You Lie?
• Should You Quit Your Job?
• Should You Go Out with the Guys?...
• Are You Whipped?
• Do You Dare Run for Public Office?
• How Many Hours of Sports Can You Watch (Without Her Getting Angry)?
• Should You Stop to Put Gas in the Car?
• How Many Kids Should You Have?
• How Big Should Your Kids' Halloween Bucket Be?
• When Will You Become Obsolete?
• The Robin Hood Morality Quiz
• The Ultimate Mobile App
• Math Formula Explains Geek's Dating Drought
• Happy Valentine's Day!

Our Reviews of Other Books by Garth Sundem

• Brain Candy
• Brain Trust