The upper part of the egg is then broken and poured off, the black spot being retained.

The moment the smallest streak proceeds from this black spot the pouring-off process is stopped.

Of course, the black part is all thrown away, the stench from it being almost intolerable, containing, as it does, sulphuretted hydrogen.

We mention the fact for what it is worth.

It would be a bold man who tried to lay down any law as to where waste ceases and the use of wrongful material commences.