366 



Mr A. J. Adie on the Expansion of Stone 



rough as it came from the mould. The other rod was also half 

 an inch square, but was cut out of the centre of a bar of the 

 same iron cast two inches square, in order to get more nearly the 

 rate of expansion of a large mass. 



In the Table, the substances are arranged in the order of their 

 rates of expansion, that which expands most being placed first. 



TABLE of the Expansion of Stone, &c. 



1. Roman cement, 



2. Sicilian white marble* 



3. Carrara marble, 



Sandstone from the | 

 liver rock of Craig- C 

 leith Quarry, . . J 



Cast-iron from a rod I 

 cut from a bar cast f 

 two inches square, < 



Cast-iron from a rod V 

 cast half an inch sq- =! 



Slate from Penrhyu V 

 Quarry, Wales, * 



ite, > 



8. Peterhead red gran 



9. Arbroath pavement, 



10. Caithness pavement, 



11. Greenstone from Ratho. 



12. Aberdeen grey granite, 



13. Best stock brick, . 



14. Fire-brick, . . . 



15. Stalk of a Dutch to- ) 

 bacco-pipe, . . . J 



1 6. Round rod of Wedge- \ 

 wood-ware (11 inches J 

 long), .... 



17. Black Marble from 

 Galway, Ireland, . 



I 



Decimals of an 

 Inch on 23 

 Inches, for 

 180° F. 



•0330043 



•0325392 

 •0253946 

 •0274344 

 •0150405 

 •0270093 



•0263755 



•0253498 

 •0238659 

 •0220416 



•0206266 



•0206652 



•0205788 



•0186043 



•01815695 



•0126542 



•0113334 



-0105177 



■0102394 



Decimal of 

 Length for 

 180° F. 



•0014349 



•0014147 



•00110411 



•0011928 



•0006539 



•0011743 



•00114676 



■001102166 

 •0010376 

 •0009583 



•0008968 



•0008985 



•0008947 



•0008089 



•00078943 



•0005502 



•0004928 



•0004573 



•00045294 



•00044519 



Decimal of 

 Length for 1 c 

 F. 



•0000075 



•0000078 

 •00000613 

 •00000662 

 •00000363 

 •00000652 



•00000637 



•00000612 

 •00000576 

 •00000532 



•Q0000498 



•00000499 

 •00000497 

 •000. 0-149 

 •00000438 

 •00000306 

 •00000274 



•00000254 

 •00000251 

 •00000247 



T When the rod contained 

 \ more moisture it ex- 

 ( panded more. 

 / From first experiment, 

 1 when moist. 

 J Mean of three experi- 

 l ments, when dry. 

 J From first experiment, 

 ' when moist. 

 J Mean of two ex per i- 

 l ments, when dry. 



Mean of four do. 



Mean of two do. 



Mean of two do. 



Mean of three do. 



J From first experiment, 



\ when moist. 



J Mean of two do., 



(^ when dry. 



Mean of four 



Mean of three 



Mean of three 



Mean of two 



Mean of two 



Mean of two 



do. 

 do. 

 do. 

 do. 

 do. 

 do. 



Mean of three do. 



Mean of two do. 

 Mean of three do. 



