T he halved joint is frequently known as half-lapping, and sometimes as checking and half-checking. In the majority of cases it is made by halving the two pieces, i.e., by cutting half the depth of the wood away. There are, however, exceptions ... Read more of The Halved Joint at Wood Workings.caInformational Site Network Informational
  Home - Chromatography - Color Value - Aesthetics - Photography

Manganese Red

Bisulphide of arsenic combines with basic metallic sulphides forming a
class of sulphur-salts, called by Berzelius, hyposulpharsenites. The
hyposulpharsenite of manganese is a dark red precipitate, uninjured by
sulphuretted hydrogen, and so far applicable as a pigment. Containing
arsenic, it would of course be poisonous; and would probably be found to
fade on exposure to air and light.

Next: Murexide

Previous: Time On A Tree Of The Common Black Spruce (abies Nigra) In The

Add to del.icio.us Add to Reddit Add to Digg Add to Del.icio.us Add to Google Add to Twitter Add to Stumble Upon
Add to Informational Site Network

Viewed 1750