Ada, the Enchantress of Numbers: Prophet of the Computer Age (Paperback)

~ Betty A. Toole (Author)

Editorial Reviews

Amazon.com Review

Many people get their first introduction to Lady Ada Lovelace, daughter of poet Lord Byron and companion to Charles Babbage, in William Gibsonand and Bruce Sterling's groundbreaking The Difference Engine. It's easy to imagine why Gibson and Sterling chose to weave her into their 1991 thriller, portraying her as the enigmatic, iconic Queen of Engines. Inspired by the real-life Lady Ada, the character is sharp, strong-minded, and eccentric.

Betty Alexander Toole's Ada, the Enchantress of Numbers bears out this view. By presenting and annotating more than 25 years of correspondence from Ada, Toole paints an endearing portrait of an inarguably remarkable woman, called by some--perhaps a bit gushingly--"the world's first hacker," because of her work with computing pioneer Charles Babbage. Although the reams of lovingly transcribed letters provide an intimate and material look at Ada's life, the accompanying analysis isn't always as useful, with objectivity taking a back seat to adoration at times. The up side of this enthusiasm is that you'd be hard pressed to find a better start for learning more about the fascinating Ada; her letters are complemented by a detailed timeline, glossary, bibliography, index, online references, and even discussion questions. --Paul Hughes

Product Details

• Paperback: 323 pages
• Publisher: Critical Connection (December 1998)
• Language: English
• ISBN-10: 0912647183
• ISBN-13: 978-0912647180
• Product Dimensions: 7.9 x 5.2 x 1 inches
• Shipping Weight: 13.1 ounces (View shipping rates and policies)
• Average Customer Review: 3.7 out of 5 stars  See all reviews (3 customer reviews)
• Amazon.com Sales Rank: #151,091 in Books (See Bestsellers in Books)

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Customer Reviews

Most Helpful Customer Reviews

12 of 12 people found the following review helpful:

4.0 out of 5 stars Well written, but missing illustrations., March 30, 1999

By A Customer

I have reviewed most of the books that are readily available on Ada. This book was well written and Dr. Toole is truly the recognized authority of Ada and her life. I found an earlier edition of this book through interlibrary loan and was disappointed that this edition did not offer the same illustrations and pictures. If you are interested in finding out more about Ada especially from her own letters, this is truly one of the best books out there. I would recommend reading at least one other book on Ada Lovlace in addition to this one, for balance, at times Dr. Toole may have been too kind to Ada's memory.

Ada is a great role model for girls, her life had much turmoil and many obstacles. She fought for her right to do math (and early computer science) in a male society. This book may be a little too steep for early high school reading, a really fabulous young adult book on this subject is Ada Byron Lovelace : The Lady and the Computer (People in Focus Book) by Mary Dodson Wade.

7 of 8 people found the following review helpful:

5.0 out of 5 stars The History of a Passionate Visionary, October 26, 1998

By	reader, writer, animal lover (New York City & southern California) - See all my reviews

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Toole's book is an excellent introduction to the life and work of the mathematical visionary, Ada Byron King. Toole's treatment allows the reader access to King's luminous mind--no small achievement.

Although it may not be appreciated by those who clearly clearly wish to argue with issues external to the text, I highly reccomend "Ada" to anyone who enjoys work which is sensitive, illuminating, and well-written.

There will probably be a richly-deserved resurgance of interest in King's life and work after the wide release of Lynn Hershman Leeson's film "Conceiving Ada," and Toole's book will be a fine resource for all who are inspired or intrigued by this singular figure.

14 of 21 people found the following review helpful:

2.0 out of 5 stars Too much idolatry, May 31, 1998

By	[e-mail] (Dutch Flat, CA, USA) - See all my reviews

This book is not about Ada but rather the author's defense of Ada's image and place in history.

There are gratuitous associations of Ada Lovelace to truly famous geniuses and science. For instance, this part of a letter (page 124) --

It cannot help striking me that *this* extension of Algebra ought to lead to a *further extension* similar in nature, to the *Geometry of Three Dimensions*; & that again perhaps to a further extension in some unknown region & so ad-infinitum possibly...

-- leads to this comparison (page 122) --

In the next series of letters Ada hyposthesized a geometry of the "fourth dimension." Several popular books today deal with this subject: Rudy Rucker's The Fourth Dimension, Stephen Hawking's A Brief History of Time, and Philip Davis's Descartes' Dream.

I don't see any reference in Ada's letter to time. I expect it is simple 4 dimensional geometry she is thinking of.

There is some incredible gushing over the programming language ADA. This book was written in 1992, when it surely should have been obvious that ADA was not the be-all and end-all. Yet the author has apprently fallen hook, line, and sinker for the party line over the programming language named after her hero. Here are some examples. Note these are the author's words, not Ada Lovelace's.

Pages 176-177: It is accordingly most fitting that the programming language ADA, developed in the early 1980s by the US Department of Defense, provides the most precise facilities for this software development (specification) task of any general-purpose software language for large-scale problems existing today.

Add this idolatry to the author's infatuation with Ada Lovelace, and the reuslt is some far-fetched comparisons between Ada Lovelace's documentation and later computer concepts.

Page 179: Here again, the ADA software language contains somewhat unique facilities corresponding in a sense to Ada's insight... A second unuusual ADA facility, exception handling, reflects in a ! different but related way Ada's vision of the Analytical Engines's superiority over the DIfference Engine...In a sense the ADA language exception handler operates at a level of control above the program itself, confirming Ada's foresight.

Page 185: One can read into the following quotations the germ of perhaps the most important advance in software development in the past twenty years, an idea variously referred to (in its many forms) as *sbatraction*, *modularity*, *separation of concerns*, *information hiding*, or *object-oriented design*.

Pages 187-188: In the first excerpt from Note D, Ada commended the use of indices, a now-basic technique for reducing complexity in the processing of regular data structures.

Page 190: ...Then she expanded the visual image she had of weaving and symmetry to highlight the *cycle*, a conceptual building block of programs for both the Analytical Engine and later the computer.

This exaggeration is also extended to Babbage's Analytical Engine.

Page 173: Babbage planned to store over 1000 fifty-digit numbers.

Page 181: It was not until the mid-1960s that the modern computer could store as many digit numbers as did the Analytical Engine.

Quite wrong; I worked on computers from the 1950s that had more storage capacity.

Pages 186-187 compare Babbage finding a new use for the Jacquard loom punched card to software reuse: Some predict that the 1990s will be the decade in which software reuse becomes the principal software development mechanism, and that the ADA software language, which simplifies software reuse because of its precise interface specification and generic subprogram facilities, will lead the way.

Page 189 compares multiple Analytical Engines operating together to current parallel supercomputers, with further comments on ADA supporting this.