98 



THE HON. SIR CHARLES ALGERNON PARSONS : EXPERIMENTS ON 



EXPERIMENT. 



4 J-inch mould ; packed with sand, coke, sawdust and salt pressed, J-inch 

 hole drilled, J-ineh carbon rod core covered with iron filings and 

 graphite, 26 tons pressure, 28 k.w.m. total heating, heating 1 minutes, 

 about 1 ton of gaseous pressure when somewhat cooled 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, f ton pressure, 28 k.w.m. total heating, 

 heating 3 minutes, about 1 ton of gaseous pressure when somewhat 

 cooled and ram released. 



4J-inch mould ; three-fourths full of C0 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-J minutes. 



2-inch mould ; ^-inch carbon rod core, carborundum and chromium oxide 



packed round, 20 tons pressure, 12 k.w.m. total heating, heating 



| minute. 

 2-inch mould ; J-inch carbon rod core, ferrous oxalate atid magnesium 



packed round, 20 tons pressure, J k.w.m. total heating, a few rounded 



particles of hard carbon, charge lile\v 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, 

 i-inch diameter air-hardened tungsten steul 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, 

 f-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. 

 l|-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, carborundum and water, 



40 tons pressure, temperature of die raised to 250 C. by means of 



gas burners. 

 l|-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. 



RESULT. 



Green carborundum non- 

 polarizing. 



Many green and also clear 

 non-polarizing 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. 





