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Twaddell's No. 5 hydrometer, scale 102-138.

Twaddell's No. 6 hydrometer, scale 138-170.

Twaddell hydrometer

1920- 1960

Twaddell no 6 hydrometer

1920-1960

Twaddell no 4 hydrometer

1920-1960

Twaddell no 1 hydrometer

1920-1960

Twaddell's No. 4 hydrometer, scale 74-102.

Glass Twaddles' hydrometer by Griffin & Tatlock Limited. Lead weight and paper scale. In brown cardboard box. Range 0 - 3.

Glass Twaddles' hydrometer

Glass Twaddle 0/6 hydrometer by Griffin & Tatlock Limited. Lead weight embedded inwax and paper scale. In grey cardboard box. Range 0 - 6.

Twaddell 0/6 hydrometer

Glass Twaddell no 4 hydrometer. Lead shot weight in wax and paper scale. In brown cardboard box. Range 74 - 102.

Twaddell no 4 hydrometer

1900-1960

Glass Twaddell's no 1 hydrometer. Mercury weight and glass scale. In black cardboard tube. Range 0 - 24.

Twaddell no 1 hydrometer

1900-1970

Glass streamline Twaddell's no 6 hydrometer by J W Towers. Lead shot weight and paper scale. In blue cardboard tube. Range 138 -170.

Twaddell no 6 hydrometer

1920-1960

Twaddell's No. 3 hydrometer, scale 48-74 (broken).

Twaddell's No. 3 hydrometer, scale 48-74 (broken).

Glass Twaddle hydrometer by Griffin & Tatlock Limited. Lead weight sealed in red wax and paper scale. In brown cardboard box. Range 0 - 6.

Glass Twaddle hydrometer

Glass Twaddell's no 4 hydrometer by J W Towers. Lead shot weight and paper scale. In blue cardboard tube. Range 0.74 - 1.02.

Twaddell no 4 hydrometer

1920-1960