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Heavenly MathematicsNote: Shipping for this item is free. Please allow up to 6 weeks for delivery. Once your order is placed, it cannot be cancelled. Condition: BRAND NEW ISBN: 9780691175997 Format: Trade paperback (US) Year: 2017 Publisher: Princeton University Press Description: Heavenly Mathematics traces the rich history of spherical trigonometry, revealing how the cultures of classical Greece, medieval Islam, and the modern West used this forgotten art to chart the
Note: Shipping for this item is free. Please allow up to 6 weeks for delivery. Once your order is placed, it cannot be cancelled.Condition: BRAND NEW
ISBN: 9780691175997
Format: Trade paperback (US)
Year: 2017
Publisher: Princeton University Press
Description:
Heavenly Mathematics traces the rich history of spherical trigonometry, revealing how the cultures of classical Greece, medieval Islam, and the modern West used this forgotten art to chart the heavens and the Earth. Once at the heart of astronomy and ocean-going navigation for two millennia, the discipline was also a mainstay of mathematics education for centuries and taught widely until the 1950s. Glen Van Brummelen explores this exquisite branch of mathematics and its role in ancient astronomy, geography, and cartography; Islamic religious rituals; celestial navigation; polyhedra; stereographic projection; and more. He conveys the sheer beauty of spherical trigonometry, providing readers with a new appreciation of its elegant proofs and often surprising conclusions. Heavenly Mathematics is illustrated throughout with stunning historical images and informative drawings and diagrams. This unique compendium also features easy-to-use appendixes as well as exercises that originally appeared in textbooks from the eighteenth to the early twentieth centuries.
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★★★★★ 5
Good hand soap for the price
Scent: Lemon
Great value for the price. The lemon scent smells fresh and clean without being overpowering, and the foaming soap works really well. I like that it’s alcohol-free and made with plant-based cleansers, so it feels gentle on the hands and doesn’t dry them out. The 2-pack refill size lasts a long time, which makes it even more worth it. Overall, a good buy for everyday use.
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Reviewed in the United States on March 22, 2026
★★★★★ 5
The best foaming soap. Doesn't dry out my hands
Scent: Lemon
I wash my hands many times a day and found that every other foaming soap I used was drying out my hands pretty bad. I found this at Target one day and gave it a try. No more dry hands!
I bought a couple Oxo foaming soap dispensers and have been using this soap for a couple years now. The lather is thick and the soap cleans my hands well without drying them out...which was a major problem with every brand I tried previously. It also smells good, but not strong (I usually buy fragrance-free products, but this doesn't bother me at all).
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Reviewed in the United States on April 27, 2026
★★★★★ 5
Rinses beautifully without drying or residue.
Scent: Rosewater (2 Pack)
The people who post videos of the refill soap being "pure water" apparently don't realize the soap also needs the FOAMING soap dispenser in order to turn this soap into foaming soap. God Bless America!
Yes, these items almost always leak when shipped, but usually not enough to return the item.
The best scents are Lemon, Desert Rose, Peppermint, and Rosewater.
I have been using these lightly scented foaming soaps for almost two decades.
They clean and rinse beautifully with no residue. Perfect for my OCD.
They never dry my hands out in the winter, regardless of how many times I wash.
The refill bottles are usually an excellent value when on sale. Highly recommended!
This foaming soap specifically needs a foaming soap dispenser. It specifically says that on the back of the package. For those complaining it’s a liquid and stays liquid, perhaps you’re using just a regular pump container.
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Reviewed in the United States on April 15, 2026
★★★★★ 4
Wonderful smell and feel. Price could be cheaper
Scent: Ocean Breeze (2 Pack)
Wonderful scent. very easy those with sensitive skin and noses. Feels wonderful on my skin for long. My one and only complaint is that It's pricey.
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Reviewed in the United States on April 30, 2026
★★★★★ 5
JR Watkins refilling hand soap
Scent: Lemon
This product is a great hand soap refill solution! Non irritating and lathers nicely!
Saves waste of buying new bottles! Refill and last longer!
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Reviewed in the United States on May 30, 2026