Determination of the Difference of Longitude Between Washington and Paris 1913 1914

above , corresponding to a Washington - Paris longitude of 5h 17m 36571 . This
depends on the adjustment of the Washington - Greenwich longitude made by
SCHOTT in 1897 , which gave for that longitude 51 gm 15978 + 0 : 05 . SCHOTT
 ...

Author: United States Naval Observatory

Publisher:

ISBN:

Category: Longitude

Page: 100

View: 230


The Theory and Practice of Finding the Longitude at Sea Or Land

The Board of Longitude ordered Mr . Kendal ( one of the Committee ) to construct
a time - keeper upon the fame principles . This instrument was committed to the
care of Mr . Wales , in his voyage round the world with Captain Cook , in the ...

Author: Andrew Mackay

Publisher:

ISBN:

Category: Latitude

Page:

View: 764


Longitude by Wire

So in 1912 , when Professor Doctor Friedrich Robert Helmert , director of the
Royal Prussian Geodetic Institute in Potsdam , Germany , proposed a
transatlantic telegraph longitude measurement , Otto Tittmann , the
superintendent of the U . S ...

Author: Richard Stachurski

Publisher: Univ of South Carolina Press

ISBN: 9781570038013

Category: History

Page: 239

View: 238

At the turn of the nineteenth century, even the most experienced mariners were still risking catastrophe when navigating the North American coastline, because they lacked accurate navigational charts. The various means available to chart makers of the era to measure longitude, both celestial and terrestrial, could be off by thousands of feet -- often deadly for ships. In 1807 the U. S. Coast Survey was created to map the coast accurately and reduce the costly and deadly toll of shipwrecks, a challenge that would take the better part of a century to overcome. This is the tale of discoveries made by American scientists as they worked to solve this life-threatening quandary and develop a precise method of measuring longitude. It recounts how the successful coupling of precision chronometers with the new electrical technology represented by Samuel Morse's telegraph produced the solution to the longitude problem. The use of the telegraph by scientists of the U.S Coast Survey to communicate time signals reduced the probable error in longitudinal measurement to less than ten feet. The "American method," as it was deemed, quickly revolutionized observational astronomy and every other branch of science that depended on recording the precise time of an event.

Portuguese and Spanish Attempts to Measure Longitude in the 16th Century

Attempts to measure longitude were made in the 16th century for three different
purposes ; astrology , cartography and navigation . Here we shall only be
concerned with cartography and navigation . The act of measurement was
undertaken in ...

Author: W. G. L. Randles

Publisher: UC Biblioteca Geral 1

ISBN:

Category: Geodesy

Page: 21

View: 412


A Practical Method for Finding the Longitude and Latitude of a Ship at Sea by Observations of the Moon

L E III , To reduce the True Dift . observed to the Diff . of their Longitudes . ...
ARTICLE I. To find the True Tabular Longitude , Latitude , Diameter , and Pa .
rallax of the Moon ; also the Longitude and Diameter of the Sun , with the hourly
Motions ...

Author: Robert Waddington

Publisher:

ISBN:

Category: Geographical positions

Page: 88

View: 781


A Supplement to the Treatise for Finding the Longitude

Containing All the Requisites for the Ready Computing and Obtaining the
Longitude of a Ship Or Place, ... To which are Added, Tables of the Declination of
the Sun, ... Also, the Most Practical Method of Obtaining the Variation of the
Compass, .

Author: Robert Waddington

Publisher:

ISBN:

Category:

Page: 45

View: 430


Latitude and Longitude Read Read Read Your Map Hands On Activity

You pick up his/her trail again outside Punta Arenas (latitude: _____, longitude:
_____), which is ______ of Rio. It's a good thing he/she dressed warmly because
he/she is heading straight for Antarctica! By the time you reach Antarctica, ...

Author: Sarah D. Giese

Publisher: Teacher Created Materials

ISBN: 1425878032

Category: Social Science

Page: 8

View: 963

Make geography fun and interactive to motivate your students. Encourage teamwork, creativity, reflection, and decision making. Take an active approach to teaching while inspiring your students to make their own explorations of geography.

A practical introduction to finding the Longitude at sea by lunar observations also to spherics and nautical Astronomy etc

REWARDS FOR FINDING THE LONGITUDE AT SEA . The first who offered a
reward for the discovery of the longitude at sea was Phillip III . king of Spain , in
the year 1598 ; and soon after , the States of Holland followed his example .

Author: Thomas EVANS (Lieut. R.N.)

Publisher:

ISBN:

Category:

Page:

View: 517


Discovery of Longitude The

The Discovery of Longitude By Joan Marie Galat Illustrated by Wes Lowe Fr
recognizable landmarks and the stars , Discover the fascinating story behind one
of the most important changes to nautical navigation . Long ago , sailors risked
their ...

Author: Joan Marie Galat

Publisher: Pelican Publishing Company, Inc.

ISBN: 9781455616374

Category: Juvenile Nonfiction

Page: 32

View: 555

Scientific discovery changes the world! Discover the fascinating story behind one of the most important changes to nautical navigation in this nonfiction book for young readers. More than 300 years ago, explorers wandered the seas using unreliable maps. What they needed to know was the longitude of their locations, but for that they needed accurate time keeping. Unfortunately, no accurate source of time measurement at sea existed. In 1714 the British government decided to offer a reward to anyone who could solve the problem. Learned men and great thinkers alike tried unsuccessfully to work out a solution. They declared it unsolvable! Carpenter John Harrison was intrigued; he thought he might have a solution. He worked for years to design a clock that functioned accurately at sea, even though no one believed he could do it. Even after his timepiece was demonstrated effective at sea, he was still not acknowledged for his ingenious solution. It took many years and intervention by the king to grant Harrison the recognition and reward he deserved for solving the problem of how to accurately track longitude and for winning the British government prize. The book offers a detailed map of the world at that time and includes the advancements in the use of longitude since then.

Latitude Longitude and Direction

People most often used it to gure out longitude while at sea. People set the watch
to the time at a known longitude. They gured out the time it was where they were
by looking at the Sun.They used the difference in times to calculate their ...

Author: Julia J. Quinlan

Publisher: The Rosen Publishing Group, Inc

ISBN: 1448861578

Category: Juvenile Nonfiction

Page: 24

View: 680

Explains the concepts of latitude and longitude as well as the purpose of the compass rose on a map.

Latitude and Longitude Grid and Bear It Hands On Activity

Distribute Introduction to Latitude and Longitude and read it as a class. Lead the
class through Latitude and Longitude Notes, diagramming first latitude and then
longitude. Use the answer keys on pages 46–47 to guide your model diagrams.

Author: Sarah D. Giese

Publisher: Teacher Created Materials

ISBN: 1425878024

Category: Social Science

Page: 10

View: 598

Make geography fun and interactive to motivate your students. Encourage teamwork, creativity, reflection, and decision making. Take an active approach to teaching while inspiring your students to make their own explorations of geography.

The Transatlantic Longitude as Determined by the Coast Survey Expeditionof 1866

Using the values above cited , the following are the determinations of the
longitude of Washington from Greenwich which have appeared best entitled to
confidence in recent years . I. From Eclipses and Occultations . These furnished
the ...

Author: Benjamin Apthorp Gould (Jr)

Publisher:

ISBN:

Category:

Page: 101

View: 866


Star tables for ascertaining the longitude and latitude at sea

This correction , or equation , is common to every fixed Star ; it depends entirely
on the Longitude , and must be taken out therewith ; consequently the correction
will be the same for one Star as for another in the same Longitude . EXAMPLE .

Author: Thomas Lynn

Publisher:

ISBN:

Category:

Page: 1845

View: 272


A practical introduction to finding the longitude at sea by lunar observations also to spherics and nautical astronomy

year 1716 , a reward of 100 , 000 livres was promised by the Duke of Orleans ,
who at that time was regent of France . John Werner , of Nurenburg , appears to
be the first who proposed the method of finding the longitude at sea , by
observing ...

Author: Thomas Evans

Publisher:

ISBN:

Category:

Page:

View: 844


On the Longitude and the easiest methods of ascertaining the same

To find the longitude by the sun's meridian altitude . RULE . From the sun's
observed , find his true meridian altitude at ship in the usual way . Take the
latitude from 90 ° , the remainder will be the co - latitude , to which add the sun's
declination ...

Author: Arthur Wellington PRICE

Publisher:

ISBN:

Category:

Page:

View: 243


A Proposal for Discovering Our Longitude

Et commençant notre calcul de Longitude à Bethléem , & par cette partie des
cieux qui lui etoit zenithale lors que notre sauveur Jesus Christ y daigna naitre
pour nous , cela marquera notre reconnoissance Chretienne ; & ' en fixant l'ere
du ...

Author: Jane Squire

Publisher:

ISBN:

Category: Longitude

Page: 115

View: 945


The method of finding the longitude at sea by timekeepers to which are added Tables of equations to equal altitudes

If the latitude had been south , it would have changed the sign ta + . In Table II ,
supposing the sun's longitude to be 2 : 10 : the equation is 05 65 when the half
interval is 5. 10 :, and 0 : 53 when it is 5. 20 :, the difference is 0 : 12. And 10 is to
7 !

Author: William WALES (F.R.S.)

Publisher:

ISBN:

Category:

Page:

View: 792


L automate de longitude Nouveau syst me d hydrom trie etc

d'embaras , inseparables de l'hydromé trie en conjecture , par . le loch & la ligne ;
qui est cependant la seule maniere pratiquée , dont on se sert aujourdhui en mer
, pour prendre la longitude ; car les éclipses du Soleil & de la Lune , les ...

Author: Allain PITOT

Publisher:

ISBN:

Category:

Page: 24

View: 706


The Theory and Practice of Finding the Longitude at Sea Or Land to Whic are Added Various Methods of Determining the Latitude of a Place by Andrew Mackay in Two Volumes

In table xxxv . is the greatest effect of the correction of the Moon's parallax in
longitude , which takes place , when the Moon's longitude is either 0 , III . vi . or ix
signs . The correction answering to any other longitude may be found thus : To
the ...

Author:

Publisher:

ISBN:

Category:

Page: 151

View: 253


New methods of finding the longitude either at sea or on shore by messrs Yarrow and T Lynn c

EXAMPLE I . Required , the Sun ' s Right Ascension at 7 hours A . M . on the 11th
September 1827 ( civil reckoning ) , in Longitude 28° West ? D . H . M . S .
Apparent time at the Ship . . 10 . 19 . 0 . 0 Art . ( 819 ) Longitude 28° West = add 1
.

Author: Thomas Yarrow

Publisher:

ISBN:

Category:

Page: 80

View: 492