In the early days of Morse, all Railway Stations were equipped with the new technology. Hearing the clatter of a Morse receiver, known as a sounder, could be a problem in a noisy environment. A gentleman called Charles Bright invented his 'Brights Bells' in 1855, a crude version of this same equipment
Added:
22nd Apr 2009
Subjects:
Design and Technology, History, Mathematics, Science
Key Stages:
Foundation, Key Stage 1, Key Stage 2, Key Stage 3, Key Stage 4, Key Stage 4+
Keywords:
Telegraphy, 1860's, Morse
Related Links:
EXIF data:FILE |
FileName | a0227.jpg |
FileDateTime | 0 |
FileSize | 234368 |
FileType | 2 |
MimeType | image/jpeg |
SectionsFound | ANY_TAG, IFD0, EXIF, GPS |
COMPUTED |
html | width="1485" height="1268" |
Height | 1268 |
Width | 1485 |
IsColor | 1 |
ByteOrderMotorola | 0 |
ApertureFNumber | f/7.1 |
UserComment | |
UserCommentEncoding | ASCII |
IFD0 |
Make | NIKON CORPORATION |
Model | NIKON D200 |
XResolution | 150/1 |
YResolution | 150/1 |
ResolutionUnit | 2 |
Software | Ver.2.00 |
DateTime | 2008:03:07 16:26:24 |
YCbCrPositioning | 2 |
ReferenceBlackWhite | Array
(
[0] => 0/1
[1] => 255/1
[2] => 128/1
[3] => 255/1
[4] => 128/1
[5] => 255/1
)
|
Exif_IFD_Pointer | 270 |
GPS_IFD_Pointer | 27340 |
EXIF |
ExposureTime | 10/1250 |
FNumber | 71/10 |
ExposureProgram | 1 |
ISOSpeedRatings | 0 |
ExifVersion | 0200 |
DateTimeOriginal | 2008:03:07 16:26:24 |
DateTimeDigitized | 2008:03:07 16:26:24 |
ComponentsConfiguration | |
ExposureBiasValue | 0/6 |
MaxApertureValue | 47/10 |
MeteringMode | 2 |
LightSource | 0 |
Flash | 0 |
FocalLength | 400/10 |
MakerNote | Nikon MM * 3 0210 È |