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  2. AOL Mail

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  3. Manhole cover - Wikipedia

    en.wikipedia.org/wiki/Manhole_cover

    A round manhole cover of a given diameter has a smaller surface area than a square cover of the same width, thus less material is needed to cast the manhole cover, meaning lower cost. The bearing surfaces of manhole frames and covers are machined to assure flatness and prevent them from becoming dislodged by traffic.

  4. Snorkel (swimming) - Wikipedia

    en.wikipedia.org/wiki/Snorkel_(swimming)

    The integrated snorkel mask may be a half-mask, which encloses the eyes and nose but excludes the mouth, or a full-face snorkel mask, which covers the eyes, nose, and mouth. Early designs of snorkel-mask typically comprised a tube for breathing with an immersion-activated shut-off valve at the top, and the bottom opening into the mask, which ...

  5. Full-face diving mask - Wikipedia

    en.wikipedia.org/wiki/Full-face_diving_mask

    A diver in a pool wearing an AGA full face mask A diver wearing an Ocean Reef full face mask Head protection helmet for use with Ocean Reef full face diving mask. A full-face diving mask is a type of diving mask that seals the whole of the diver's face from the water and contains a mouthpiece, demand valve or constant flow gas supply that provides the diver with breathing gas. [1]

  6. Face masks during the COVID-19 pandemic in the United States

    en.wikipedia.org/wiki/Face_masks_during_the...

    A public service announcement from the Government of California encouraging people to wear masks to "slow the spread". In late March 2020, some government officials began to focus on the wearing of masks to help prevent transmission of COVID-19 as opposed to protecting the wearer; former FDA Commissioner Scott Gottlieb stated in a report that face masks would be "most effective" at slowing its ...

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  8. Glossary of nautical terms (M–Z) - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_nautical_terms...

    An opening in a ship's side, especially a round one for admitting light and air, fitted with thick glass and, often, a hinged metal cover, used as a window. portolan An obsolete form of nautical chart used prior to the development of lines of latitude and longitude that indicated distances and bearing lines between ports. position light

  9. Timeline of United States inventions (before 1890) - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_United_States...

    The mask forms a sealed cover over the nose and mouth, but may also cover the eyes and other vulnerable soft tissues of the face. The gas mask was invented in 1847 by Lewis Haslett, a device that contained elements that allowed breathing through a nose and mouthpiece, inhalation of air through a bulb-shaped filter, and a vent to exhale air back ...

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