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The first swimming pool cleaner was invented in 1912 by Pittsburgh, Pennsylvania citizen John M. Davison. On November 26, 1912, he submitted a patent application to the United States Patent and Trademark Office entitled "Cleaning Apparatus For Swimming Pools And The Like", which was issued on March 25, 1913.
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One summer, the Aleuts return and Karana takes refuge in the cave. She observes the Aleuts closely and realizes that a girl named Tutok takes care of the domestic duties including getting water from the pool near Karana's cave. Fearful of being discovered, Karana goes out only at night, yet the curious girl stalks Karana, and the two meet.
Dolphinarium in Harderwijk, the Netherlands, Dutch newsreel from 1966. Though cetaceans have been held in captivity in both North America and Europe by 1860—Boston Aquarial Gardens in 1859 and pairs of beluga whales in Barnum's American Museum in New York City museum— [3] [4] dolphins were first kept for paid entertainment in the Marine Studios dolphinarium founded in 1938 in St. Augustine ...
The hourglass dolphin (Lagenorhynchus cruciger) is a small dolphin in the family Delphinidae that inhabits offshore Antarctic and sub-Antarctic waters. [3] It is commonly seen from ships crossing the Drake Passage but has a circumpolar distribution.
Dolphin WaterCare is a brand of environmentally responsible pulsed-power water treatment technology patented by Clearwater Systems Corporation. [ 3 ] [ 4 ] The system is designed to control scale, corrosion and biological activity in cooling towers without the use of chemicals, chemical tanks or pumps. [ 5 ]
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