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Detaching-weight sounder, single-hook model, designed by Ensign Brooke of the US Navy, USA, 1852-1860.

Detaching-weight sounder designed by Ensign Brooke

1852-1860

Tube lead, 1872

Tube lead, 1872

1872

Sinker and valved tube with detaching appliance, for pianoforte wire sounding machine, c.1873.

Sinker and valved tube with detaching appliance

1870-1876

Stellwagen cup lead, wooden model

Stellwagen cup lead, wooden model

Baillie weight-detaching sounding apparatus, designed by Navigating Lieutenant C. W. Baillie, made 1888.

Baillie weight-detaching sounding apparatus for deep sea sounding

1888

Fitzgerald sounding machine for collecting specimens from the sea bottom, designed by Lieutenant Fitzgerald, c.1867. The instrument’s detaching iron weight is represented by a wooden model. It is of the type used on HMS Cordelia for deep sea sounding operations between Jamaica and Cuba, 1867-1868; and by Charles Wyville-Thomson aboard HMS Lightning for investigations into deep sea life, 1868.

Fitzgerald sounding machine for collecting specimens from the sea bottom

1867

Baillie weight-detaching sounding apparatus, designed by Navigating Lieutenant C. W. Baillie, 1872. Twelve devices of this type were despatched for use on HMS Challenger in 1873. The instrument’s iron sinking weights are represented by wooden models.

Baillie weight-detaching apparatus for deep sea sounding

1873

Jaws from ‘Bulldog’ sounder and sampler for gauging the depth of the sea floor and collecting sediment samples, designed by marine engineer Mr. Steil, assistant engineer Mr. Roughton, and the ship’s naturalist George Charles Wallich aboard the paddle steamer HMS Bulldog during telegraph survey operations around the Faroe Islands, Iceland and Greenland, 1860.

Jaws from Bulldog sounder and sampler used during telegraph survey operations

1860

Detaching-weight sounder, possibly later form, designed by Ensign Brooke of the US Navy, USA, about 1856.

Detaching-weight sounder, or ‘Brooke’s Rod’, designed by Ensign Brooke

c.1856

Baillie weight-detaching sounding apparatus, designed by Navigating Lieutenant C. W. Baillie, 1872. Twelve devices of this type were despatched for use on HMS Challenger in 1873. The instrument’s iron sinking weights are represented by wooden models.

Baillie weight-detaching apparatus for deep sea sounding

1873