The Twenty-fifth Amendment (Amendment XXV) to the United States Constitution deals with succession to the Presidency and establishes procedures both for filling a vacancy in the office of the Vice President, as well as responding to Presidential disabilities. It supersedes the ambiguous wording of Article II, Section 1, Clause 6 of the Constitution, which does not expressly state whether the Vice President becomes the President or Acting President if the President dies, resigns, is removed from office or is otherwise unable to discharge the powers of the presidency. The Twenty-fifth Amendment was adopted on February 10, 1967.

Section 1. In case of the removal of the President from office or of his death or resignation, the Vice President shall become President.
Section 2. Whenever there is a vacancy in the office of the Vice President, the President shall nominate a Vice President who shall take office upon confirmation by a majority vote of both Houses of Congress.
Section 3. Whenever the President transmits to the President pro tempore of the Senate and the Speaker of the House of Representatives his written declaration that he is unable to discharge the powers and duties of his office, and until he transmits to them a written declaration to the contrary, such powers and duties shall be discharged by the Vice President as Acting President.
Section 4. Whenever the Vice President and a majority of either the principal officers of the executive departments or of such other body as Congress may by law provide, transmit to the President pro tempore of the Senate and the Speaker of the House of Representatives their written declaration that the President is unable to discharge the powers and duties of his office, the Vice President shall immediately assume the powers and duties of the office as Acting President.
Thereafter, when the President transmits to the President pro tempore of the Senate and the Speaker of the House of Representatives his written declaration that no inability exists, he shall resume the powers and duties of his office unless the Vice President and a majority of either the principal officers of the executive department or of such other body as Congress may by law provide, transmit within four days to the President pro tempore of the Senate and the Speaker of the House of Representatives their written declaration that the President is unable to discharge the powers and duties of his office. Thereupon Congress shall decide the issue, assembling within forty-eight hours for that purpose if not in session. If the Congress, within twenty-one days after receipt of the latter written declaration, or, if Congress is not in session, within twenty-one days after Congress is required to assemble, determines by two-thirds vote of both Houses that the President is unable to discharge the powers and duties of his office, the Vice President shall continue to discharge the same as Acting President; otherwise, the President shall resume the powers and duties of his office.

The Twenty-fifth Amendment in the National Archives

Article II, Section 1, Clause 6 of the Constitution states:
In Case of the Removal of the President from Office, or of his Death, Resignation, or Inability to discharge the Powers and Duties of the said Office, the Same shall devolve on the Vice President, and the Congress may by Law provide for the Case of Removal, Death, Resignation or Inability, both of the President and Vice President, declaring what Officer shall then act as President, and such Officer shall act accordingly, until the Disability be removed, or a President shall be elected.
That clause was unclear regarding Presidential succession and inability; it did not state who had the power to declare a President incapacitated. Also, it did not provide a mechanism for filling a Vice Presidential vacancy prior to the next Presidential election. The vagueness of this clause caused difficulties many times before the Twenty-fifth Amendment’s adoption:
In 1841, President William Henry Harrison became the first U.S. President to die in office. Representative John Williams had previously suggested that the Vice President should become Acting President upon the death of the President. John Tyler asserted that he had succeeded to the presidency, as opposed to only obtaining its powers and duties. He also declined to acknowledge documents referring to him as “Acting President”. Although he felt his vice presidential oath negated the need for the presidential oath, Tyler was persuaded that being formally sworn-in would clear up any doubts about his right to the office. Having done so, he then moved into the White House and assumed full presidential powers. Tyler’s claim was not formally challenged, and both houses of Congress adopted a resolution confirming that Tyler was the tenth President of the United States, without any qualifiers. The precedent of full succession was thus established. This became known as the “Tyler Precedent”.
There had been occasions when a President was incapacitated. For example, following Woodrow Wilson’s stroke no one officially assumed the Presidential powers and duties, in part because the First Lady, Edith Wilson, together with the White House Physician, Cary T. Grayson, covered up President Wilson’s condition.
The office of Vice President had been vacant sixteen times due to the death or resignation of the Vice President or his succession to the presidency. For example, there was no Vice President for nearly four years after the death of Franklin D. Roosevelt.
All of these incidents made it evident that clearer guidelines were needed. There were two proposals for providing those guidelines.

Keating–Kefauver proposal

In 1963, Senator Kenneth Keating of New York proposed a Constitutional amendment which would have enabled Congress to enact legislation providing for how to determine when a President is disabled, rather than, as the Twenty-fifth Amendment does, having the Constitution so provide. This proposal was based upon a recommendation of the American Bar Association in 1960.
The text of the proposal read:
In case of the removal of the President from office or of his death or resignation, the said office shall devolve on the Vice President. In case of the inability of the President to discharge the powers and duties of the said office, the said powers and duties shall devolve on the Vice President, until the inability be removed. The Congress may by law provide for the case of removal, death, resignation or inability, both of the President and Vice President, declaring what officer shall then be President, or, in case of inability, act as President, and such officer shall be or act as President accordingly, until a President shall be elected or, in case of inability, until the inability shall be earlier removed. The commencement and termination of any inability shall be determined by such method as Congress shall by law provide.
Senators raised concerns that the Congress could either abuse such authority or neglect to enact any such legislation after the adoption of this proposal. Tennessee Senator Estes Kefauver (the Chairman of the Senate Judiciary Committee’s Subcommittee on Constitutional Amendments), a long-time advocate for addressing the disability question, spearheaded the effort until he died of a heart attack on August 10, 1963.

Kennedy assassination

With President John F. Kennedy’s assassination, the need for a clear way to determine presidential succession, especially with the new reality of the Cold War and its frightening technologies, forced Congress into action. The new President, Lyndon B. Johnson, had once suffered a heart attack, and the next two people in line for the presidency were Speaker of the House John McCormack, who was 71 years old, and Senate President pro tempore Carl Hayden, who was 86 years old. Senator Birch Bayh succeeded Kefauver as Chairman of the Subcommittee on Constitutional Amendments and set about advocating for a detailed amendment dealing with presidential succession.

Bayh–Celler proposal

On January 6, 1965, Senator Birch Bayh proposed in the Senate and Representative Emanuel Celler (Chairman of the House Judiciary Committee) proposed in the House of Representatives what became the Twenty-fifth Amendment. Their proposal specified the process by which a President could be declared disabled, thereby making the Vice President an Acting President, and how the President could regain the powers of his office. Also, their proposal provided a way to fill a vacancy in the office of Vice President before the next presidential election. This was as opposed to the Keating–Kefauver proposal, which did not provide for filling a vacancy in the office of Vice President prior to the next presidential election or itself provide a process for determining presidential disability. In 1964, the American Bar Association endorsed the type of proposal which Bayh and Celler advocated.
On February 19, the Senate passed the amendment, but the House passed a different version of the amendment on April 13. On July 6, after a conference committee ironed out differences between the versions, the final version of the amendment was passed by both Houses of the Congress and presented to the states for ratification.

(the above from wikipedia)

A Joint Congressional Resolution requiring the Secretary of War “to provide for taking meteorological observations at the military stations in the interior of the continent, and at other points in the States and Territories…and for giving notice on the northern lakes and on the seacoast, by magnetic telegraph and marine signals, of the approach and force of storms” was introduced. Congress passed the resolution and on February 9, 1870, President Ulysses S. Grant signed it into law. A new national weather service had been born within the U.S. Army Signal Service’s Division of Telegrams and Reports for the Benefit of Commerce that would affect the daily lives of most of the citizens of the United States through its forecasts and warnings for years to come. Gen. Albert J. Myer served as the first Director of the new weather service.

For the Whole Story

he National Weather Service (NWS) is an agency of the United States government that is tasked with providing weather forecasts, warnings of hazardous weather, and other weather-related products to organizations and the public for the purposes of protection, safety, and general information. It is a part of the National Oceanic and Atmospheric Administration (NOAA) branch of the Department of Commerce, and is headquartered in Silver Spring, Maryland (located just outside Washington, D.C.). The agency was known as the United States Weather Bureau from 1890 to 1970, when it adopted its current name.
The NWS performs its primary task through a collection of national and regional centers, and 122 local weather forecast offices (WFOs). As the NWS is a government agency, most of its products are in the public domain and available free of charge.

In 1870, the Weather Bureau of the United States was established through a joint resolution of Congress signed by President Ulysses S. Grant with a mission to “provide for taking meteorological observations at the military stations in the interior of the continent and at other points in the States and Territories…and for giving notice on the northern (Great) Lakes and on the seacoast by magnetic telegraph and marine signals, of the approach and force of storms.” The agency was placed under the Secretary of War as Congress felt “military discipline would probably secure the greatest promptness, regularity, and accuracy in the required observations.” Within the Department of War, it was assigned to the U.S. Army Signal Service under Brigadier General Albert J. Myer. General Myer gave the National Weather Service its first name: The Division of Telegrams and Reports for the Benefit of Commerce.
Cleveland Abbe – who began developing probabilistic forecasts using daily weather data sent by the Cincinnati Chamber of Commerce and Western Union, which he convinced to back the collection of such information in 1869 – was appointed as the Bureau’s first chief meteorologist. In his earlier role as the civilian assistant to the chief of the Signal Service, Abbe urged the Department of War to research weather conditions to provide a scientific basis behind the forecasts; he would continue to urge the study of meteorology as a science after becoming Weather Bureau chief. While a debate went on between the Signal Service and Congress over whether the forecasting of weather conditions should be handled by civilian agencies or the Signal Service’s existing forecast office, a Congressional committee was formed to oversee the matter, recommending that the office’s operations be transferred to the Department of War following a two-year investigation.
The agency first became a civilian enterprise in 1890, when it became part of the Department of Agriculture. Under the oversight of that branch, the Bureau began issuing flood warnings and fire weather forecasts, and output the first daily national surface weather maps; it also established a network to distribute warnings for tropical cyclones as well as a data exchange service that relayed European weather analysis to the Bureau and vice versa. The first Weather Bureau radiosonde was launched in Massachusetts in 1937, which prompted a switch from routine aircraft observation to radiosondes within two years. The Bureau prohibited the word “tornado” from being used in any of its weather products out of concern for inciting panic (a move contradicted in its intentions by the high death tolls in past tornado outbreaks due to the lack of advanced warning) until 1938, when it began disseminating tornado warnings exclusively to emergency management personnel.
The Bureau would later be moved to the Department of Commerce in 1940. On July 12, 1950, bureau chief Francis W. Reichelderfer officially lifted the agency’s ban on public tornado alerts in a Circular Letter, noting to all first order stations that “Weather Bureau employees should avoid statements that can be interpreted as a negation of the Bureau’s willingness or ability to make tornado forecasts”, and that a “good probability of verification” exist when issuing such forecasts due to the difficulty in accurately predicting tornadic activity. However it would not be until it faced criticism for continuing to refuse to provide public tornado warnings and preventing the release of the USAF Severe Weather Warning Center’s tornado forecasts (pioneered in 1948 by Air Force Capt. Robert C. Miller and Major Ernest Fawbush) beyond military personnel that the Bureau issued its first experimental public tornado forecasts in March 1952. In 1957, the Bureau began using radars for short-term forecasting of local storms and hydrological events, using modified versions of those used by Navy aircraft to create the WSR-57 (Weather Surveillance Radar, 1957), with a network of WSR systems being deployed nationwide through the early 1960s; some of the radars were upgraded to WSR-74 models beginning in 1974.
The Weather Bureau became part of the Environmental Science Services Administration when that agency was formed in August 1966. The Environmental Science Services Administration was renamed the National Oceanic and Atmospheric Administration (NOAA) on October 1, 1970, with the enactment of the National Environmental Policy Act. At this time, the Weather Bureau became the National Weather Service.[5] NEXRAD (Next Generation Radar), a system of Doppler radars deployed to improve the detection and warning time of severe local storms, replaced the WSR-57 and WSR-74 systems between 1988 and 1997

Jack St. Clair Kilby

Kilby received his bachelor of science degree from the University of Illinois at Urbana-Champaign, where he was an honorary member of Acacia Fraternity. In 1947, he received a degree in Electrical Engineering. He obtained his master of science in Electrical Engineering from the University of Wisconsin-Extension in Milwaukee (which later became the University of Wisconsin–Milwaukee) in 1950, while simultaneously working at Centralab in Milwaukee.

In mid-1958, Kilby, as a newly employed engineer at Texas Instruments (TI), did not yet have the right to a summer vacation. He spent the summer working on the problem in circuit design that was commonly called the “tyranny of numbers” and finally came to the conclusion that manufacturing the circuit components en masse in a single piece of semiconductor material could provide a solution. On September 12 he presented his findings to management, which included Mark Shepherd. He showed them a piece of germanium with an oscilloscope attached, pressed a switch, and the oscilloscope showed a continuous sine wave, proving that his integrated circuit worked and thus that he had solved the problem. U.S. Patent 3,138,743 for “Miniaturized Electronic Circuits”, the first integrated circuit, was filed on February 6, 1959.[4] Along with Robert Noyce (who independently made a similar circuit a few months later), Kilby is generally credited as co-inventor of the integrated circuit.
Jack Kilby went on to pioneer military, industrial, and commercial applications of microchip technology. He headed teams that built both the first military system and the first computer incorporating integrated circuits. He later co-invented both the hand-held calculator and the thermal printer that was used in portable data terminals.
In 1970, he took a leave of absence from TI to work as an independent inventor. He explored, among other subjects, the use of silicon technology for generating electrical power from sunlight. From 1978 to 1984 he held the position of Distinguished Professor of Electrical Engineering at Texas A&M University.

He is also the inventor of the handheld calculator and the thermal printer, for which he has patents. He also has patents for seven other inventions.
In 1983, Kilby retired from Texas Instruments.