106 
THE HON. Sm CHAELES ALGERNON PARSONS: EXPERIMENTS ON 
Experiment. Result. 
Heated iron filings and sodium carbonate No. 6 grit in tube on top Nil. 
(bright red) .30 minutes. 
Heated iron and sodium chloride (bright red) 20 minutes carborundum Nil. 
No. G grit in hole in cast-iron lid on top. 
Heated ferro silicon (15 per cent.) in carlmn crucilfie till most of contents Nil. 
of crucible had volatilized, analysed dust from walls of vacuum pot and 
ingot remaining in crucible. 
Heated iron, ferro silicon, ferro manganese, carbon and calcium carlfide in Nil. 
carbon crucible. 
Heated iron, iron sulphide, carbon and calcium carbide, cooler! slowly in Nil. 
vapour of carbon bisulphide. 
Heated iron, carbon, calcium carbide and ferro titanium in atmosphere of Nil. 
carbon bisulphide, pressure } mm. absolute. 
Heated iron, ferro silicon, and ferro titanium in atmosphere of carbon Nil. 
bisulphide, pressure ^ mm. absolute. 
Heated iron, ferro titanium and ferro silicon. Nil. 
Heated iron and carborundum in atmo.sphere of carbon bisulphide, pressure Nil. 
I mm. absolute. 
Heated reduced iron and lampblack, calcium metal placed near crucible Nil. 
to absorb nitrogen, pressure ^ mm. absolute. 
EXPERIMENTS IN X-RAY VACUA. 
(See fig. 12.) 
Experiment. • Result. 
Heated cast iron in carbon crucible to vaporising point, cooling by Nil. 
radiation only. 
The following were all heated to temperature of vaporisation and then allowed to cool by 
radiation only :— 
Heated calcium carbide. 
Heated ferro-silicon. 
Heated calcium carbide and No. 6 grit.. 
Heated nickel and No. 6. 
Heated aluminium, magnesium, calcium carbide, and No. 6 grit 
Heated ferro-silicon, nickel, and No. 6 grit. 
Heated nickel, iron sulphide, and No. G grit. 
Heated ferro-titanium and No. G grit. 
Heated iron sulphide, zinc, and No. G grit. 
Heated ferro-silicon, sand, and lampblack. 
Heated reduced iron, sand, and lampblack to point of ebullition at 
atmospheric pressure, then re-heated under vacuum, much ebullition 
of gas from metal and many iron spherules thrown out of crucible. 
Nil. 
Nil. 
Nil. 
Nil. 
Nil. 
Nil. 
Nil. 
Nil. 
Nil. 
Doubtful. 
Large yield of rounded par¬ 
ticles and plates from 
ejected metal. These all 
burnt in oxygen. Contents 
of crucible yielded nothing. 
