THE ARTIFICIAL PRODUCTIOX OF DIAMOND. 
97 
Experbients. 
4-inch mould; packed with dry alumina, l|-inch hole, ^--inch carbon rod 
core, iron, lampblack, carborundum, ferro manganese and thorium 
nitrate round, sodium on top, 26 tons pressure, 20 k.w.m. total heating, 
heating 1 minute 10 seconds. 
4-inch mould; packed with carborundum, l^-inch hole drilled in it, 
|-inch carbon rod core, |-inch paper tube filled with iron and ferro 
vanadium, carbon and iron round, sodium on top, 26 tons pressure, 
20 k.w.m. total heating, heating 1 minute. 
4-inch mould; packed with anhydrous ferrous oxalate, |-inch hole drilled, 
i-inch iron rod core, sodium round, ferrous oxalate on top, covered 
with graphite, 26 tons pressure, 25 k.w.m. total heating, heating 
3 minutes. 
4-inch mould; packed with sodium chloride and carborundum, f-inch 
carbon rod core, 26 tons pressure, 25 k.w.m. total heating, heating 
4 minutes. 
4-inch mould; alumina, rouge, magnesium chloride and calcium chloride, 
pressed ; l|-inch hole, f-inch carbon rod core, carborundum in hole, 
26 tons pressure, 15 k.w.m. total heating, heating 1^ minutes. 
4-inch mould ; packed with carborundum, calcium carbide, aluminium 
carbide, sodium chloride, magnesium chloride, sulphur, iron filings ; 
f-inch hole drilled, carbon rod put in, carbon tetrachloride poured on 
top, covered with graphite, 26 tons pressure, 50 k.w.m. total heating, 
heating 13 minutes, charge blew out, mould dilated. 
4-inch mould; packed with alumina, -^-inch hole, |-inch iron rod core, 
lead peroxide and carborundum placed in hole and on top, covered 
with iron filings, 26 tons pressure, 8 k.w.m. total heating, heating 
1 minute. 
4-inch mould; packed with alumina, 1-inch hole, |-inch iron rod core, 
rouge and carborundum in hole, 26 tons pressure, 50 k.w.m. total 
heating, heating 3 minutes. 
4-inch mould; packed with carborundum and 4 per cent, sodium 
carbonate, pressed at 16 tons, 1-inch hole drilled, f-inch carbon rod 
core, carborundum and sodium carbonate placed in hole, 26 tons 
pressure, 15 k.w.m. total heating, heating 3 minutes, formed grey solid 
which detonated when struck. 
4-inch mould; |-inch carbon rod core, iron sulphide and sulphur round, 
then sodium silicate and lampblack, 26 tons pressure, 50 k.w.m. total 
heating, heating 2| minutes. 
4-inch mould; 1-inch carbon rod core, sodium silicate, alumina, rouge, 
magnesia, and lime round, 26 tons pressure, 40 k.w.m. total heating, 
heating 1^ minutes. 
4-inch mould; packed with artificial pyrope, 1-inch hole, ^-inch carbon 
rod core, carborundum and sodium peroxide placed in hole, 26 tons 
pressure, 8 k.w.m. total heating, heating 3| minutes. 
4-inch mould; filled with sand, 1-inch hole, ^-inch carbon rod core, filled 
hole with potassium nitrate and carborundum, 26 tons pressure, 
15 k.w.m. total heating, heating 1 minute. 
Result. 
Nil. 
Nil. 
Nil. 
Sodium carbide and silicon 
formed. 
Green carborundum pro¬ 
duced. 
Some crystals from centre 
and also from ejected 
matter. 
Nil. 
Some amorphous carbon and 
silicate of iron. 
Sodium carbide and pale 
green carborundum. 
Nil. 
Nil. 
Nil. 
Nil. 
