472 Adams dj Coker — Investigation into the Flow of Rocks. 



the rock with its tube is enclosed in a small stove of special 

 construction heated by a gas blast, the air being supplied by a 

 Reichhelm blower driven by a 2.h.p. electric motor. 



In experimental work formerly carried out on the Flow of 

 Marble at temperatures up to 400° C, a small cast-iron stove was 

 used. As in these later experiments much higher temperatures 

 — up to 1000° C. — have been employed, it was found that in 

 many cases it was extremely difficult to remove the steel tube 



Fig. 3. 



\ 



UPPER PRESS PLATE. 



BLAST 



LOWER PRESS PLATE 



/ 



O 5 «0 15 



1.1, 1.1,1,1, 1,1.1.1, 1.1.1,1,1,1 



CENTIMETERS 



V 



enclosing the rock from the stove at the conclusion of the 

 experiment, the two having become partially welded together. 

 A stove of cast steel has, therefore, been substituted, made in 

 two parts which are firmly held together by heavy steel collars 

 during the experiment, which collars can be removed at the 

 conclusion of the experiment, allowing the stove to fall apart 

 and access to the enclosed tube to be thus easily obtained. This 

 form of stove has proved very satisfactory. A section of it is 

 shown in tig. 3. 



