100 
THE HON. SIR CHARLES ALGERNON PARSONS : EXPERIMENTS ON 
(B.) RIFLE EXPERIMENTS. 
(See figs. 6, 7, and 8.) 
Experiment. 
O'303 bullets were fired into holes, 0'303-inch diameter (in some cases 
of tungsten steel air hardened, tapering to -g-inch at the bottom) in 
steel blocks; in the holes were placed the following substances:— 
Coarse carborundum; No. 6 grit, which after the experiment was 
found to be crushed to small splinters. 
Carborundum (very fine grained) and sodium; carborundum unaltered 
Carborundum and iron; very fine grained carborundum and finely 
powdered iron, the carborundum appeared slightly whitened, other¬ 
wise unaltered. 
Calcium carbide and sulphur; calcium carbide all destroyed and 
calcium sulphide formed. 
Carborundum (very fine grained) and nickel filings; no whitening of 
the carborundum. 
Carborundum and sodium peroxide. 
Bort; somewhat crushed. 
Fired bullet through carbon arc into hole in steel block. 
Fired bullet through carbon rods arcing in a bed of graphite contained 
in fire clay crucible, above the hole in steel block. 
Graphite and sodium peroxide . . . 
Fired bullet through white hot iron plate into hole containing carbon 
rod heated white hot by resistance heating. 
Fired bullet into hole containing graphite in steel block whilst arcing 
between top of hole and a carbon rod to produce vapour of iron. 
Calcium carbide and paper (wet); amorphous carbon formed .... 
Cotton wool; a little amorphous carbon formed. 
Potassium chlorate and sugar carbon. 
Carbon bisulphide and rubber. 
Carbon bisulphide and sodium bis*muthate. 
Carbon bisulphide and potassium chlorate. 
Mineral oil. 
Carbon bisulphide. 
Sodium bismuthate, benzene, and carbon tetrachloride. 
Graphite and paper; bullet struck side of hole in block, producing a 
small amount of molten iron. 
Through white hot carbon-bridge over hole electrically heated to point 
of vaporization. 
Graphite and iron. 
Graphite and fulminate caps. 
White hot graphite, contained in small crucible previousl}^ heated in 
arc furnace and placed above hole. 
Red hot graphite as above.. . 
Graphite and fulminate in paper. 
Result. 
Nil. 
Nil. 
Nil. 
Nil. 
Nil. 
Sodium silicate and amor¬ 
phous carbon formed. 
No change. 
Nil. 
Nil. 
Graphite destroyed. 
Nil. 
Rounded fragments of 
graphite. 
Nil. 
Nil. 
Nil. 
Nil. 
Nil. 
Nil. 
Nil. 
Nil. 
Nil. 
A few crystals. 
A few crystals. 
Nil. 
Nil. 
Nil. 
Nil. 
Nil. 
