104 



THE HON. SIR CHARLES ALGERNON PARSONS : EXPERIMENTS ON 



EXPERIMENT. 



Passed CO over iron sulphide melted in salamander crucible in wind 

 furnace. Top of crucible closed by massive iron lid containing on side 

 inlet tube for CO and in centre 1 inch hole with perforated bottom, 

 hole fitted with No. 6 grit. 



Same experiment repeated many times 



RESULT. 



Many clear plates, some 

 with triangular markings. 



Would not burn in oxygen. 



(D) EXPERIMENTS IN VACUUM. 



(See figs. 10 and 11.) 

 All experiments allowed to cool by radiation only unless otherwise stated. 



EXPERIMENTS. 



1-inch mould ; heated reduced iron and lampblack in carbon cup, pressure 

 varied between f-inch and 3-inch absolute. Cooling by radiation only. 

 Large amount of gas produced containing CO 95 per cent., hydrogen 

 1 per cent., hydrocarbon 2 per cent., nitrogen 2 per cent. (Fig. 10.) 



Ititjh Vuriuini Experiments underpressures varying fwm 10 inn. 



Heated iron and 10 per cent, sugar carbon in salamander crucible for 



half an hour by arc on top, vacuum about 1 mm. 

 Iron, sugar carbon and iron sulphide heated in carbon crucible 15 minutes, 



then water allowed to enter through tap causing spherules to be ejected, 



vacuum about 1 mm. 



As above, but carbon bisulphide instead of water 



Magnesia, lampblack and tar heated in carbon crucible 



Alumina and borax fused in wind furnace then heated in carbon crucible 



in vacuum. 



Alumina, lampblack and tar heated in carbon crucible 



Aluminium carbide, calcium carbide, magnesia, iron, carbon and tar, 



baked and placed in crucible, resistance heated in vacuum furnace, 



crucible of sulphur either side to give off sulphur vapour in chamber. 

 Crucible filled with iron and carbon, closed by carbon cover, hole bored 



in side of crucible and massive iron block placed opposite hole, 



contents boiled, deposit of carburized iron on block analysed, vacuum 



about 25 mm. 

 Arc deflected by electro-magnet on to iron block, deposit on block 



analysed, vacuum about ] mm. 

 Tungsten steel packed round with carbon in carbon crucible and heated 



to ebullition. 



Iron, lampblack, Prussian blue heated in carbon crucible by resistance 



heating. 

 Carbon crucible containing potassium ferrocyanide, lampblack and 



reduced iron, melted by resistance heating. 



RESULT. 



Large residue of crystals 

 which burnt in oxygen. 



in ,' mm. absolute. 

 Nil. 



10 per cent, of residue from 

 ejected spherules burnt in 

 oxygen. 



Nil. 



Metallic magnesium and 

 magnesium carbide pro- 

 duced. 

 Clear transparent alumina. 



Aluminium carbide formed. 

 Nil. 



Nil. 



Nil. 

 Nil. 

 Nil. 

 Nil. 



