… hard calcareous stone, homogeneous and fine‑grained, often crystalline and either opaque or translucent. Marble is … at Ecaussines. It is a bluish‑grey stone with an irregular crystalline structure and contains many fossilised shells. …
… as membranes for use in the processes of osmosis and dialysis, as papers for diplomas, etc., as tracing paper and … by reducing the fibres to a state of fine subdivision and hydrolysing them by prolonged beating in water. The paper is …
… by measuring the apparent distance covered in a given time. Nowadays, these instruments are always automatic. One type operates by means of a screw or …
… (A) Electro‑magnetic generators . In one of the systems based on this principle, the generator has a drive … for the “organ” type of instrument. In another system, a harmonium‑type “free‑reed” moves across a pole of …
… casks; iron or steel fittings for electric wiring (e.g., stays, clips, brackets); suspension or connecting devices … tubing or hose to rigid piping, taps, etc.; hangers, stays and similar supports for fixing piping and tubing ( …
