Osmic acid (Osmium tetroxide) may be transmitted by the inland post subject to the following conditions:-(a)The acid shall be securely packed in a hermetically sealed stout glass capsule which shall be embedded in the centre of a tin case filled with fine sand in such a manner as to leave a laver of sand not less than 4 centimeters between any part of the glass capsule and the inside of the tin case.(b)The outside of the tin case shall be labelled in red letters 6 millimeters high "Osmic Acid-Dangerous To Handle".(c)The tin case shall be soldered down and placed in an outer box of wood or reasonable strength with a later of at least 25 millimeters of raw cotton wool between the inner tin case and the outer wooden box.(d)The outside of the wooden box shall also be labeled in red letter "OSMIC ACID".(e)The quantity of the acid enclosed in a capsule shall not exceed two grams and not more than one capsule shall be enclosed in a parcel.
