98 
THE HON. SIR CHARLES ALGERNON PARSONS: EXPERIMENTS ON 
Experiment. 
Result. 
4^-inch mould; packed with sand, coke, sawdust and salt pressed, |-inch 
hole drilled, Ainch carbon rod core covered with iron filings and 
graphite, 26 tons pressure, 28 k.w.m. total heating, heating IJ minutes, 
about 1 ton of gaseous pressure when somewhat cooleil and ram 
released. 
Same as the above plus 20 per cent, ferrous oxalate, 5 tons pressure, 
30 k.w.m. total heating, about 3 tons of gaseous pressure when some¬ 
what cooled and ram released, heating 1 minute 40 seconds. 
Same as above plus zinc dust, | ton pressure, 28 k.w.m. total heating, 
heating 3 minutes, about 1 ton of gaseous pressure when somewhat 
cooled and ram released. 
4^-inch mould; three-fourths full of 00-2, snow pressed hard, sand, coke, 
sawdust and salt put on top, carbon rod core, 15 tons pressure, 
9 k.w.m. total heating, heating 5^ minutes. 
2-inch mould; |-inch carbon rod core, carborundum and chromium oxide 
packed round, 20 tons pressure, 12 k.w.m. total heating, heating 
I minute. 
2-inch mould; ^-inch carbon rod core, ferrous oxalate and magnesium 
packed round, 20 tons pressure, i k.w.m. total heating, a few rounded 
particles of hard carbon, charge blew out after 2 seconds heating, 
repeated three times with same result, should be further investigated. 
2-inch die; melted tin and rubber poured into die, crucible containing 
molten iron placed on top and pressed to 18 tons. 
|-inch diameter air-hardened tungsten steel die; graphite and 7 grains of 
fulminate under 230 tons pressure, die heated 180° C., fulminate 
exploded and retained in mould. 
|-inch diameter air-hardened tungsten steel die; graphite and 15 per 
cent, potassium chlorate placed in press, and pressure increased till 
mixture detonated at about 200 tons per sq. inch. 
|-inch diameter air-hardened tungsten steel die; graphite and saltpetre 
and three fulminate caps, heated with burner to above temperature of 
detonation of fulminate under 230 tons pressure, nothing escaped. 
Melted iron in carbon crucible, added bismuth, poured into steel mould 
and pressed to 20 tons. 
1^-inch tempered steel die; sodium in bottle surrounded with mixture of 
carborundum and lampblack, added water, and pressed at 100 tons for 
10 minutes. 
1^-inch tempered steel die; lithium in bottle, carborundum and water, 
50 tons pressure for 15 minutes. 
1^-inch tempered steel die; sodium in bottle, carborund-um and water, 
40 tons pressure, temperature of die raised to 250° C. by means of 
gas burners. 
1^-inch tempered steel die; potassium in bottle and carbon bisulphide, 
60 tons pressure, die heated by gas to 250° C. 
l^--inch tempered steel die; ferrous oxalate and sodium, 100 tons pressure 
for 4^ hours. 
Green carborundum non¬ 
polarizing. 
Many green and also clear 
non-jiolarizing plates. 
Green and yellow plates 
which would not burn in 
oxygen. 
Nil. 
Green carborundum and 
silicon produced. 
Nil. 
Nil. 
Nil. 
Nil. 
Nil. 
Nil. 
Nil. 
Nil. 
Nil. 
Nil. 
Nil. 
