Wikimedi'Òc

Dorsey with fathometer.jpg - Doug Coldwell

Fathometer.jpg - Doug Coldwell

Dorsey submarine mine.jpg - Doug Coldwell

Dorsey sound wave printer.jpg - Doug Coldwell

Automatic Deposit Box.jpg - Doug Coldwell

Dorsey variable condenser.jpg - Doug Coldwell

Dorsey railways indicating system.jpg - Doug Coldwell

Dorsey telephone receiver.jpg - Doug Coldwell

Dorsey wave motion device.jpg - Doug Coldwell

Dorsey measuring device.jpg - Doug Coldwell

Dorsey with Fathometer 1930.jpg - Doug Coldwell

Fathometer operator.jpg - Doug Coldwell

Dorsey Fathometer internal.jpg - Doug Coldwell

Fathometer Filter.jpg - Doug Coldwell

Brown fathometer.jpg - Doug Coldwell