1!>G 



THE CIVIL ENGINEER AND ARCHITECT'S JOURNAL. 



[June, 



V. Coall/rooi Vale, No. i.— Cold Blast. 



1. Light colour ; close iron ; slight de- 

 fect on upper biile. Bar ratlier full in 

 size. 



2. Fracture same in colonr and appear, 

 ance as No. 1 bar. 



3. Similar fracture to No. 1 and 2 hars . <; 



Weit:tit applied 

 ju lb~. 



^ iOli 



I 518 

 J 630 

 j 742 

 + 798 

 *- B 910 



490 

 ! .518 

 030 

 742 

 + 798 

 11948 



406 



518 



630 



742 



798 

 + 826 

 B833 



L 



DefleclioD. 



•30 



•385 



•48 



•595 



•655 



•77 



•285 



•37 



•455 



•56 



•62 



•775 



•28 

 •365 

 •455 

 •56 

 •62 

 •65 

 •66 

 Mb. 



Set. 



■01 



015 

 •022 



•015 



•017 

 •017 



•015 

 ■(125 

 ■03 



Mean breaking weight of the three bars, 897 



Average breaking weight of the preceding 15 bars, cast from five 

 sorts of cold-blast iron 



Average ultimate deflection from 14 of the bars . . . 



Average permanent set acquired from 15 of the bars, with a weight 

 ofC301b 



855 1b. 

 •784 in. 



■051 



MIXTURES OF IRONS. 



Ystalyfera, No. 3. — Hot Blast. Anthracite. These bars do not rightly 

 come under the head of mirtures, but are placed here from their peculia- 

 rity as being Anlhracile iron. 



r 



Metal close, of even texture. 



silvery grey. 



Metal very close, fracture even. Co- 

 lour silvery grey, as above. 



Metal as the preceding bars, in co- 

 lour and appearance of fracture. 



Ditto as above . 



406 



518 



Colour ] 630 



"I 086 



+742 



*- B877 



406 

 518 

 630 

 686 

 742 

 770 

 + 798 

 B1008 



406 

 518 

 630 



686 

 742 

 770 

 798 

 + 8'26 

 L B998 



( 406 



j 518 



630 



742 



798 



+326 



\Ji 1036 



f 406 



618 



030 



686 



<! 742 



798 



826 



+ 854 



LB 1041 



406 



[ 518 

 630 

 J 086 

 742 

 798 

 + 854 

 BI026 

 Jlcan breaking weight of the six bars, 



4. Metal as above < 



. This bar being cast large, was filed 

 on the sides to exactly one square inch, 

 with a view to ascertain if the outer 

 skin or crust was advantageous as to 

 strength. 



•235 



•205 



•335 



•43 



•48 



•67 



•265 



•345 



•42 



■405 



•515 



•53 



•57 



•77 



•265 

 •345 

 •425 



•48 



•635 



•56 



•595 



•62 



•815 



•28 



•37 



•455 



•55 



•01 



•64 



•85 



•25 



•325 



•407 



•45 



•495 



•655 



•575 



•60 



•79 



•256 



■34 



•415 



•46 



•515 



■565 



•62 



•81 



•000 

 •005 

 ■005 



•01 

 •01 



•015 



•025 



•04 



•04 



•05 



•055 



•015 

 •02 

 •02 

 •03 



•01 



•017 



•02 



•025 



•03 



•075 



•01 



•025 

 ■025 

 •035 



J r Ystalyfcrd, No. 3. — Anthracile\in equal propor. 

 \ Blaenavon, No. I. — Cold Blast J tiuna. 



1. Fracture uniform darkish grey ; ra- 

 ther open. 



2. Clear uniform fracture ; rather closer 

 than No. 1 bar. 



3. Clear iron; rather open, bluish grey -^ 



Mean breaking weight of the three bars, 876 lb. 



1 . — Hot Blast "1 in equal propor- 

 tions. 



Garscube, No 



Redsdale, No. 3.— Hot Blast / 



fA'o. 1 Cast of burs.) 



400 

 518 

 630 

 1. Close grained, rather dark in colour. ■, ggQ 



+ 742 

 Boot 



r 

 I 



2. Similar to No. 1 bar . 



r 



L 



400 

 518 

 030 

 680 

 742 

 798 

 + 820 

 B971 



•27 



■335 



■41 



•49 

 •55 



•84 



•275 



•305 



•405 



•52 



■575 



•035 



•OH 



•87 



Mean breaking weight of the two bars, 981 lb. 



III. 



Garscube, No. 1. — Hot Blast J in equal propor- 

 Redsdale, No. 3. — Hot Blast j tions. 



(No. 2 Cast of bars) 



1 . Metal soft and open at centre of bar. 

 Cast at an angle of 15'^. 



2 More close than No. 1 bar. Cast at 

 an angle of 15°. 



Fracture like to No. 1 bar. Cast at 

 an angle of 20°. 



406 

 518 

 030 

 086 

 742 

 +798 

 B812 



f 406 

 I 518 

 I 030 

 { 686 

 742 

 I +798 

 LB 1000 



406 

 518 

 030 

 080 

 742 

 + 798 

 L. B910 



r 



•305 



•39 



•495 



•55 



■01 



•675 



•09 



•28 



•37 



•405 



•52 



■585 



•04 



•89 



•28 



•38 



•485 



•55 



•015 



•075 



•825 



Mean breaking weight of the three bars, 907 lb. J 



998 lb. 



IV 



r Dundyvan, No. 3. — Hot Blast. \ 

 ' \ Coltness, No. 3. — Hot Blast. J 



tn equa' propor- 

 tions. 



1. Mild open metal 



406 

 518 

 630 

 686 

 742 

 I +770 

 L B833 



•29 



•385 



■49 



•55 



■01 



•655 



•725 



•02 

 ■035 



•06 



■01 

 •025 



•015 

 •03 



•01 

 ■015 



