visibility Similar

New fathometer used at full speed. Washington, D.C., May 7. Dr. Herbert Grove Dorsey of the U.S. Coast and Geodetic Survey has invented an instrument to secure the precise measurement. The machine sends a sound, pitched so high that it is above audibility, traveling thru the water a known speed, the sound hits the bottom and returns as an echo at 20 times per second. The fathometer is so accurate that a change in depth of three inches can be detected. the indications are made by a flash from a neon tube, viewed thru a rotating disc, the flash of light appearing to stand still and the depth is read as easily as a clock. The instrument indicator is installed in the pilot house (at the top of the machine) and the transceiver (the disc at the right of the machine ?) is located in the hull of the ship, 571937

[Man with insect collection] - Glass negative photogrpah. Public domain.

Man with insect collection - Glass negative photogrpah. Public domain.

A black and white photo of a group of people. Office of War Information Photograph

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New fathometer used at full speed. Washington, D.C., May 7. Dr. Herbert Grove Dorsey of the U.S. Coast and Geodetic Survey has invented an instrument to secure the precise measurement. The machine sends a sound, pitched so high that it is above audibility, traveling thru the water a known speed, the sound hits the bottom and returns as an echo at 20 times per second. The fathometer is so accurate that a change in depth of three inches can be detected. the indications are made by a flash from a neon tube, viewed thru a rotating disc, the flash of light appearing to stand still and the depth is read as easily as a clock. The instrument indicator is installed in the pilot house (at the top of the machine) and the transceiver (the disc at the right of the machine ?) is located in the hull of the ship, 571937

Measuring relative humidity by radio. Washington, D.C. June 9. The hair element for measuring relative humidity in radio weather sounding balloons has proved innacurate because of very slow response at the cold temperatures encountered in the upper atmosphere. F.W. Dunmore, Radio Engineer of National Bureau of Standards, has just developed a new device for the U.S.Navy which will overcome this effect and at the same time will not be affected in response by temperature. He is shown in the photograph observing a graph on the recorder being produced by radio signals from an ascending balloon carrying the new device. This is the first record obtained with this new developement and shows a repidity of response much greater than the hair hygrometers Hitherto used. 6/9/37

Demonstrate aviator's tester at Military Surgeons and Pharmacists Congress. Washington, D.C., May 8. Lieut. Ugo Reitano, army medical corps member from Italy, Capt. C.L. Leedhorn of the U.S. School of Aviation, look on while General Constantine Iliescu of Roumania tries out the latest U.S. Army mechanical tester for reaction of airplane pilots. The machine sets up theoretical problems for the pilot and test his reaction to each, thus eliminating hours of expensive tests by other methods

Howard Hughes speaking before the Press Club. Washington, D.C., July 21. Howard Hughes, speaking at the National Press Club today, before hundreds of government officials and representatives of foreign governments. Hughes today envisioned a future in aviation when giant flying boats, almost as large as modern ocean liners, will fly the Atlantic under conditions in which the element of luck will play no part, speaking at the luncheon in his honor, he described in detail the type of flying craft and equipment he believes the future will see but which is now nothing more than an aeronautical engineers dream, 7/21/38

New Coast Guard boat capable of 35 miles an hour. Washington, D.C., May 17. One of the fastest things afloat, the new U.S. Coast Guard patrol boat #441 was put thru its paces on the Potomac River today for the benefit of treasure officials. The cruiser, which is one of eight to placed in law enforcement and life-saving service of the Coast Guard, is powered with four 1600 horsepower motors and is capable of doing 35 miles an hour, 5171937

Naval aviator sets new speed mark to win Curtiss Marine Trophy., Lt. W.G. Tomlinson, right, roaring over a 100 mile course on the Potomac River, in his tiny Navy fighting plane, won the Curtiss Marine Trophy race today and broke the record for service seaplanes by a wide margin. His record speed of 175 miles per hour for the annual classic eclipsed the mark of the late Major C.A. Lutz of the Marine Corps. of 154 which won last year's race. The Secretary of the Navy, Adams is shown on his right

Naval aviator sets new speed mark to win Curtiss Marine Trophy., Lt. W.G. Tomlinson, right, roaring over a 100 mile course on the Potomac River, in his tiny Navy fighting plane, won the Curtiss Marine Trophy race today and broke the record for service seaplanes by a wide margin. His record speed of 175 miles per hour for the annual classic eclipsed the mark of the late Major C.A. Lutz of the Marine Corps. of 154 which won last year's race. The Secretary of the Navy, Adams is shown on his right

Famous transatlantic flyer demonstrates new type plane to Navy Officials. Clarence Chamberlain, famous Transatlantic flyer, and Ruth Nichols (in cabin) noted aviator, arrived in Washington today with the new Chamberlain cabin menoplane. In this photograph they are pointing out the many features of this new plane to Commander A.H. Douglas, Commandant of the Naval Air Station and Commander J.H. Towers, Assistant Chief of the Naval Bureau of Aeronautics (right). Unusual visibility and special aerlons which Chamberlain says practically makes it impossible for this ship to stall or go into a tailspin, are the new features

Demonstrate aviator's tester at Military Surgeons and Pharmacists Congress. Washington, D.C., May 8. Lieut. Ugo Reitano, army medical corps member from Italy, Capt. C.L. Leedhorn of the U.S. School of Aviation, look on while General Constantine Iliescu of Roumania tries out the latest U.S. Army mechanical tester for reaction of airplane pilots. The machine sets up theoretical problems for the pilot and test his reaction to each, thus eliminating hours of expensive tests by other methods

New fathometer used at full speed. Washington, D.C., May 7. Dr. Herbert Grove Dorsey of the U.S. Coast and Geodetic Survey has invented an instrument to secure the precise measurement. The machine sends a sound, pitched so high that it is above audibility, traveling thru the water a known speed, the sound hits the bottom and returns as an echo at 20 times per second. The fathometer is so accurate that a change in depth of three inches can be detected. the indications are made by a flash from a neon tube, viewed thru a rotating disc, the flash of light appearing to stand still and the depth is read as easily as a clock. The instrument indicator is installed in the pilot house (at the top of the machine) and the transceiver (the disc at the right of the machine [?]) is located in the hull of the ship, 5/7/1937

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Summary

Public domain photograph of people in office, interior, the 1910s-1920s America, free to use, no copyright restrictions image - Picryl description

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district of columbia washington dc glass negatives new fathometer new fathometer herbert grove dorsey herbert grove dorsey coast geodetic survey geodetic survey instrument measurement machine sound audibility thru water hits sound hits bottom returns echo times change depth inches three inches indications flash neon tube neon tube disc light clock indicator instrument indicator pilot house pilot house transceiver hull ship doctor physician united states history library of congress
date_range

Date

01/01/1937
person

Contributors

Harris & Ewing, photographer
place

Location

Washington, District of Columbia, United States ,  38.90719, -77.03687
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Source

Library of Congress
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Link

http://www.loc.gov/
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No known restrictions on publication.

label_outline Explore Three Inches, Indications, Measurement

When I'm thru with the arms of the army (I'll come back to the arms of you)

[The Danny Kaye Show, Carter Barron Amphitheater, July 17th thru July 30th, 1961]

Troop movement map ... Second Battle of Manassas, August 28, [thru August 30] 1862 ... Manassas National Battlefield Park, Virginia /

Citations of individual production merit awarded. The first five Citations of Individual Production Merit have been awarded to five war workers, War Production Drive Headquarters has announced. The citation is the highest honor conferred for individual achievement. It is granted only for ideas or suggestions that have an outstanding effect on the entire war effort. Joseph H. Kautsky, Indianapolis, Indiana, an employee of the Lin-Belt Co., was awarded his citation for four suggestions, each technical. He suggested a grinding wheel adapter, which permits higher speeds in internal grindings; a simplification cutting down the number of special internal grinding spindle wheel adapters from twelve to three; the adoption of a precision screw adjustment to the vertical column of dial indicator guages, to get faster adjustments without danger to the dials; and a new method of testing the concentricity of internally ground parts. The picture shows Mr. Kautsky (center) being congratulated by formean Bill Whitaker (right) as Superintendant R. E. Whitney (left) looks on

"Coin Collector." Washington, D.C., April 11. Mrs. Edness Wilkens, Secretary to Nellie Tayloe Ross, Director of the Mint, for the last four years has been collecting coins as a hobby, thru gifts, trades, and buys, she has a collection of over 400 coins ramping from half pennies to the old silver cartwheels, she is shown inspecting a half-dime , one of the first coins struck from the Philadelphia Mint in 1792, and Mint tradition has it that the silver it contains is from the tableware of Martha Washington, she at that time lived two doors down from the Mint, and gave part of her silverware for the first coins, April 11, 1938

Neon sign in Bishop, a small town in Inyo County, California, at the northern end of the sweeping Owens Valley in the Eastern Sierra Mountains

Neon sign of the Million Dollar Cowboy Bar in Jackson Hole, Wyoming

Temple Area, Tower of Antonia thru arch

[Portrait of Tommy Dorsey, record store, Washington, D.C., between 1938 and 1948]

When the Yanks march thru Berlin

Flash and crash march - Public domain American sheet music, 1883

Col. Roosevelt on his tour thru New Jersey before the convention / Underwood & Underwood.

Topics

district of columbia washington dc glass negatives new fathometer new fathometer herbert grove dorsey herbert grove dorsey coast geodetic survey geodetic survey instrument measurement machine sound audibility thru water hits sound hits bottom returns echo times change depth inches three inches indications flash neon tube neon tube disc light clock indicator instrument indicator pilot house pilot house transceiver hull ship doctor physician united states history library of congress