Q: an extract of the leaves, seeds or roots has a diuretic effect, stimulates the digestion and is good against rheumatism.

A: An extract of the leaves, seeds or roots has a diuretic effect, stimulates the digestion and is good against rheumatism.
++++++++
Q: things began to go less well for brouncker from around 1675.

A: Things began to go less well for Brouncker from around 1675.
++++++++
Q: to unlock the entire upper part of the chair: turn the lever anticlockwise towards the rear and let go; the upper part of the chair will now follow all your movements (= active dynamic seated posture).

A:
To unlock the entire upper part of the chair: Turn the lever anticlockwise towards the rear and let go; the upper part of the chair will now follow all your movements (= active dynamic seated posture).
++++++++