The aerophore, an apparatus to enable a person to enter a noxious, inflammable atmosphere, was successfully tested at Chatham, 12-14 Jan 1875. Invented by Louis Denayrouze, a naval lieutenant, it comprised an air-pump, lamp, and flexible tubing*. Air in cylinders at a pressure of 300-350 lb/in2, reduced through a valve to atmospheric pressure, supported respiration. The apparatus was heavy and unmanageable for more than an hour's supply. He and Benoit Rouquayrol, a French mining engineer, had patented an underwater aerophore (1865), a steel tank filled with compressed air carried on a diver's back, connected through valves to a mouthpiece. It was the predecessor of contemporary scuba equipment.
SUBMARINE CABLE PLOW
January 12, 1937 - First transatlantic cable, U.S.A.
The first U.S. patent for a submarine cable plow was issued. It was designed to feed a cable at the same time that it would dig a trench in the ocean bed. The device could be used at depths up to a half mile. The first transatlantic cable of high-speed formally was buried on 14 Jun 1938. The inventors were Chester S. Lawton of Ridgewood, N.J., and Capt. Melville H. Bloomer of Halifax, Nova Scotia, Canada. They assigned the patent to the Western Union Telegraph Co. (No. 2,607,717).
MEMBER LOGIN
RANDOM QUOTES
Happiness
by Thomas Jefferson
"...Our greatest happiness does not depend on the condition of life in which chance has placed us, but is always the result of a good conscience, good health, occupation, and freedom in all just pursuits...."
No Man is Above the Law
by Theodore Roosevelt
"..."No man is above the law and no man is below it; nor do we ask any man's permission when we require him to obey it. Obedience to the law is demanded as a right; not asked as a favor."..."
RANDOM FACTS
Salary
about Steve Jobs
Steve Jobs' annual salary was $1, just enough to keep company health benefits.
Cancer Facts & Figures
about Besides Lung Cancer
Besides lung cancer, tobacco use also increases the risk for cancers of the mouth, lips, nasal cavity (nose) and sinuses, larynx (voice box), pharynx (throat), esophagus (swallowing tube), stomach, pancreas, kidney, bladder, uterus, cervix, colon/rectum, ovary (mucinous), and acute myeloid leukemia.
Teachers - Educators :
Choose Your Color :
Category Information : Teachers - Educators
This is our Teachers - Educators category. If you are interested in Teachers - Educators, feel free to browse these listings. If you have a site that fits within this category, Submit it for inclusion.
Reading and Math tutors in Hampton Roads. Academic tutoring for all subjects and all grade levels, serving Hampton, Virginia Beach, Norfolk, Portsmouth, Chesapeake, Newport News and Suffolk.
Is based out of the New York City and Greater Boston area. We provide one-on-one academic support for students of all ages from grade school through college. Our objective is not only to improve ou...
Is an online job board that promotes careers and employment opportunities for all Australians across every industry. Our imaginative and friendly approach allows us to deliver a solution that is be...
Has the answers for the above questions! The New York-based test preparation company will make these seemingly Herculean tests easy for you! We have produced amazing results in GMAT, GRE, SAT, TOEF...
Carvers for Conservation was started to introduce the people conserving the habitat of migratory birds to the premier bird sculptors in the world. My intention was to be mutually beneficial to the ...
Champagne hot air Balloon flights over Berkshire, Hampshire, Hertfordshire, Oxford, Surrey and London. The perfect surprise gift for that special occasion - Birthday Presents, Valentine Surprises, ...
Unfortunately just like humans our pets will age too. With the aging process comes health problems and with health problems comes very expensive vet bills. Research you dog
Friendship poems happen to be just the best medium of expressing eternal friendship to that special friend. You can let all the love and affection you possess flow out, right onto the paper lying in front of you, through a sweet little friendship.