Precision balance.

Crusher made of a material which does not absorb moisture, is easy to clean, enables crushing to be effected quickly and evenly without overheating, limits contact with the outside air to the minimum, and meets the requirements mentioned in point 2 (for example a detachable roller mill).

Receptacle made of non-corrodible metal or glass, fitted with a sufficiently tight-fitting lid; working surface allowing distribution of the test sample at 0,3 g per cm².

Electrically heated isothermic heating chamber, set at a temperature of 130 to 133 ^oC25 having adequate ventilation26.

Dessicator with a metal or, failing metal, porcelain plate (thick, perforated), containing any suitable dessicant.