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Description
Number: The Language of Science"Beyond doubt the most interesting book on the evolution of mathematics which has ever fallen into my hands." Albert Einstein Number is an eloquent, accessible tour de force that reveals how the concept of number evolved from prehistoric times through the twentieth century. Renowned professor of mathematics Tobias Dantzig shows that the development of math from the invention of counting to the discovery of infinity is a profoundly human story that
"Beyond doubt the most interesting book on the evolution of mathematics which has ever fallen into my hands."--Albert Einstein Number is an eloquent, accessible tour de force that reveals how the concept of number evolved from prehistoric times through the twentieth century. Renowned professor of mathematics Tobias Dantzig shows that the development of math--from the invention of counting to the discovery of infinity--is a profoundly human story that progressed by "trying and erring, by groping and stumbling." He shows how commerce, war, and religion led to advances in math, and he recounts the stories of individuals whose breakthroughs expanded the concept of number and created the mathematics that we know today.Binding Type: Paperback
Publisher: Plume Books
Published: 02/01/2007
ISBN: 9780452288119
Pages: 398
Weight: 0.77lbs
Size: 8.02h x 5.38w x 0.94d
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4.6 ★★★★★
Based on 974 reviews
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Product Reviews
★★★★★ 5
Used for a year.
Color: Black
Had this in a back pack for a year and wow. The dirt collected is kinda shocking. I will buy more of these for different bags!
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Reviewed in the United States on April 21, 2026
★★★★★ 5
Fun little gadget we never knew we needed.
Color: Pink
Who knew keeping our bags and purses could be so easy. Easy to clean once it does it's "job". Doesn't take up much room and works like a charm
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Reviewed in the United States on March 31, 2026
★★★★★ 3
Mixed Results - Sauberkugel Clean Ball Review
Color: Bag Petrol
I purchased the Sauberkugel Clean Ball in Teal to help keep my bags clean from dust, dirt, and crumbs, and while it had some positive aspects, I can only give it a moderate 3-star rating due to a few shortcomings.
On the plus side, the concept of the sticky inside ball is ingenious and showed promise. It did manage to pick up some dust and small particles (including glitter) from my purse which was a relief. The teal color is cute and made it easier to spot in a bag.
However, there were some limitations that affected its overall effectiveness.
*It seemed to struggle with picking up certain types of debris, particularly larger crumbs, heavier dirt, and ever some larger glitter/confetti pieces. This inconsistency was a bit disappointing as I had hoped based on the ads for it to be much more effective.
*Another major issue I encountered was the difficulty of opening and cleaning the ball. The design was supposed to make it relatively easy to open and clean (as the ads lead me to believe). However I was unable to get the ball unlatched - which made it quite challenging to clean fully. It was frustrating to wrestle with the ball and being unable open to clean it out fully.
In summary, while the Sauberkugel Clean Ball had its merits and did manage to capture some unwanted particles, it fell short in terms of consistency and ease of use. The struggle to open and clean the ball was a significant drawback for me.
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Reviewed in the United States on August 29, 2023
★★★★★ 5
Great item, totally worth it.
Color: Black
I've used this for over a year now in my nice work purse to keep those tiny dirt particles from who-knows-where (you know the ones I mean!) from mysteriously getting in the bottom of of it. It rolls around easily in its plastic case either naturally (without getting goopy or leaky) or rolled by hand. Handiest thing I've ever bought to help keep my purse clean!
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Reviewed in the United States on December 23, 2025
★★★★★ 5
Extremely helpful keeping remotes in order
Color: Blue, Size: Small
Nice quality remote control holder, makes it easy to find what you need, organized life is an easier life to live ! Great price too and it looks good ! This was a great little buy, I brought one for my Mom and another for the guest bedroom.
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Reviewed in the United States on December 18, 2025
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