Constants of Igneous Rock. 

 Table III. — Contraction of Diabase. Series IV. 

 ? = 25-447 centim., \ '= 1*220 centim., r =15 centim 



187 









Apparent 



Volume- 











6 . 



Mean. 



e. 



Tolunie- 

 expansion 



expansiou 

 of the 



dv/v . 



Mean. 

 3v/v . 



Time. 



Remarks. 







of Rock. 



tube. 









1 



°0. 



°c. 



xio 1 . 



XlO 4 . 



xio 4 . 





Minutes. 





1374 



1388 



403 



357 



760 



•0760 



5 



Liquid. 



1394 





404 



(356) 



761 



(■0760) 







1395 









(759) 

 (760) 



768 









1415 



1421 



407 



362 



•0770 



20 



Liquid. 



1431 





409 



(364) 



771 



(•0771) 







1417 









(771) 

 (773) 









! 1318 



1319 



394 



341 



734 



(•0731) 



50 



Liquid. 



1324 





387 



(339) 



727 



(•0730) 







1315 









(733) 

 (726) 









1304 



1305 



383 



350 



733 



•0736 



65 



Liquid. 



1308 





390 



(335) 



740 



(•0721) 







1304 









(718) 

 (725) 









1204 



1190 



357 



316 



673 



•0672 



90 



Sticky. 



1189 





355 



(305) 



671 



(•0661) 







1176 









(662) 

 (660) 









1177 



1163 



355 



299 



655 



•0652 



105 



Very sticky. 



1158 





349 



(299) 



649 



(•0652) 





To be drawn 



1153 









(655) 

 (649) 

 625 







aut in threads. 



1138 



1112 



339 



286 



•0628 



128 



Top en- 



1109 





344 



(286) 



630 



(•0628) 





crusted. 



1090 









(625) 

 (630) 









1117 



1092 



200 



275 



475 



•0475 



151 



Solidifying. 



1088 





155 



(280) 



430 



(•0480) 







1072 





91 





366 









1109 



1092 



33 



282 



315 



•0287 



175 



Solidifying, 



1081 





5 



(280) 



287 



(•0285) 







1088 

















946 



914 



13 



213 



226 



0223 



198 



Solid. 



903 





6 





220 









893 

















900 



855 



3 



199 



202 



•0202 



210 



Solid. 



827 





3 





202 









837 



















20 















•0000 



Next day. 



Cold. 



f Kock, mean actual expansion, solid, 0°-1000° . . 

 1 „ „ „ „ liquid, 1100°-1500 



I „ contraction on solidification, at 1092° . 

 f Rock, mean apparent expansiou, 0°-1000° . . 

 1 „ „ „ „ 1100°-1500° 



j Tube, mean volume-expansion below 1000° 

 | „ „ „ ., above 1100° . 



02 



•0000250 

 •0000408 



•0000005 



-000021 8 

 •0000235 



•0000260 



