Was laid in Newark, N.J. Previously, coal tar was used for many pavements laid in the 1860s. The first recorded asphalt pavement in the U.S. was a sand mix placed in front of the City Hall in Newark, N.J., in 1870. Edmund J. DeSmedt, a Belgian chemist (who became the inspector of asphalt and cements for the District of Columbia) held a U.S. patent for this asphalt paving method, granted on 31 May 1867. In that century most roads, even in cities, were wide dirt pathways, severely affected by weather. Smooth surfaced asphalt roads originally were for the benefit of bicyclists. By 1904, only 141 miles were surfaced, but commonplace by 1916. Natural asphalt deposits were originally used, but almost all of the asphalt used commercially is now made from petroleum.
THE FIRST IRON LUNG
July 29, 1927 - United States
(Electric Respirator) was installed at Bellevue hospital in New York for the post war polio epidemic. The first iron lung was developed at Harvard University by Phillip Drinker and Louis Agassiz Shaw built with two vacuum cleaners. The iron lung is a negative pressure machine which surrounds the patient's body except for the head, and alternates a negative atmospheric pressure with the ambient one, resulting in rhythmic expansion of the chest cage (and thus inhalation) in response to the negative extra thoracic pressure. During periods of ambient extrathoracic pressure, the lungs deflate. This type of machine is rarely used today.
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Harvard Medical School
about Eyesight Myth and Fact
Myth: Staring at a computer screen all day is harmful to the eyes.
Fact: Spending the day staring at a screen can tire or strain your eyes, but it will not hurt them. Make sure lighting doesn't create a glare on your screen. When spending long periods at your keyboard, take a break now and then to rest your eyes to reduce fatigue. Also, don't forget to blink. Your eyes need to stay lubricated to feel comfortable.
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Steve Jobs' annual salary was $1, just enough to keep company health benefits.
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Category Information : Business Dir
This is our Business Dir category. If you are interested in Business Dir, feel free to browse these listings. If you have a site that fits within this category, Submit it for inclusion.
Is a well-respected DC boutique law firm that specializes in personalized, effective and quality legal representation. Our law firm assists clients in a variety of legal matters, with a particular ...
Every Webmaster today understands the importance of Directory Submission. A powerful backlink to your website can achieve desired ranking in major search engines, Google, Yahoo, MSN. Thus it genera...
The aim is to become the USA's best local search engine and directory for everyone looking for home services. Home Services Engine uses a local search engine that is 100% free for any business that...
Is here to help you from beginning to end. From picking the right floor for your needs to purchasing it, laying it and even cleaning it - we're with you all the way. With us you can find flooring r...
This Web Directories; is a hub of world wide export import directories and allows you to submit your export import business in different country based export import directory. It saves your time to...
Or Business Directory is the small business listings from all over the UK, SEO, Food Consultant, Psychic & Clairvoyants, Laptops, Webdesign and Development, Plumbers, Money and Finance, Internet Ma...
Open a Citizens Bank account and discover convenient online banking features and the personal finance options that you deserve. Choose a checking account or high interest savings account that fits ...
Each quarter, twenty general or topical web directories are evaluated and rated according to predetermined criteria. The top ten are placed in competition with one another and ten additional direct...
The course of the River Thames as we know it today was created about 10,000 years ago, by melt water from the ice-sheets that covered much of the United Kingdom during the last ice-age...
Search engine is the term with which we are accustomed with very much. But the web directory is not that same. The web directories are older than search engines according to the time of their invention.