1850.] 



THE CIVIL ENGINEER AND ARCHITECT'S JOURNAL. 



1S7 



Weight npplied 

 111 lbs. 



r 



2. As No. 1 bar •{ 



3. Clear good fracture, but evidently 1 

 wants tenacity, frmu its breaking with ■{ 

 so Utile deflection. 



4UG 

 518 

 G30 

 G83 

 742 

 1 +770 

 L B800 



40fi 



518 

 (>30 

 C58 



r 



I +0S6 



Dtflection. 



•30 



•395 



■4'J 



•515 



•01 



•64 



•74 



•3-25 



•425 



•53 



•505 



•5<J 



•68 



Mean breaking weight of the three bars, 8'241b. 



'. i Clyde, No. i.—IIot Blast \ » ■'' '^ 

 !_ Coltneis, No. 3.— Hot Blast J 



1. Fracture clear and even; metal mild 



2. Clear grey; metal rather open at i 

 centre of bar. i 



Metal as No. 2 bar i 



Mean breaking weight of the three bars, 859 lb. 



f Langloan, No. 3.- 



VI. ■< Omoa, No. 1.- 



[ Forth, No. 3.- 



-Hot Blast 1 . , 



-Hot Blast ['"'IZ' P'''^'"- 



-Hot Blast! '"""■ 



Dark bluish grey ; rather soft. Bar 

 slighily defective on upper side. 



L 



406 

 518 

 630 

 686 

 714 

 + 742 

 B817 



f 406 

 518 



I 630 



2. Metal as No. 1 bar { 686 



714 



I +742 



L B847 



r 



3. Metal as No. 1 and 2 bars ; dark in 

 colour, and soft. 



< 



•32 



•425 



•55 



■62 



•66 



•70 



•805 



•33 

 •45 



•58 



•665 



•70 



•74 



•91 



•32 



•43 



•56 



•635 



•675 



•715 



•83 



•015 

 •03 



•03 

 •04 



•025 

 •04 



•03 

 •045 



•02 

 ■035 



406 



518 



630 



686 



714 

 I +712 

 L B824 



Mean breaking weight of the three bars, 829 lb. 



VII, Omoa, Blair, Clyde, Lnngloan, Forth, and Collness, all No. 3. — Hot 

 Blast, in equal proportions. 



Fracture clear; would indicate good 

 iron. 



2. Fracture like to No, I bar 



Clear, uniform and 

 iJaik, 



Alt-au breaking weight of the three bars, 901 lb. 



VIII. Scotch Hot Blast and Scrap, ordinary Foundry Mixture, fur general 

 purposes. 



1. Metal close ; dull grey , 



2. Fracture brIghtiT than No. 1 bar 



3. Close and like to No. 2 bar. Bar full 

 in .MZe by nearly -j!^ iu depth. 



Mean breaking weight of the three bars, 8791b.. 



lY / Carairoe, No. 1. — Hot Blast \in equal propor- 

 ^ Xliedsdale, No. Z.— Hot Blast i 



tions. 



1. Clear open; li<;ht colour. 



2. As No, 1 bar. Lighter colour than 

 than the Coltness and Langloan bars. 



406 

 618 

 630 

 686 

 B714 



406 



518 



630 



+686 



B7-20 



Mean breaking weight of the two bars, 717 lb. 



Same iron as No. 9, with an addition of one-third of Scrap iron. 

 Scrap would be principally Cold Blast. J 



1. Metal free to work. Fracture clear 

 and bright. 



2. As No. 1 bar . 



3. As No. 1 and 2 bars . 



406 

 518 

 630 

 686 

 742 

 770 

 +798 

 B820 



406 

 513 

 630 

 686 

 742 

 770 

 + 798 

 B920 



406 

 518 

 630 

 686 

 742 

 770 

 +798 

 B933 



•265 



•355 



•44 



•49 



•545 



•585 



•605 



•64 



•25 



•33 



•415 



•46 



•52 



•515 



•57 



•685 



•27 



•35 



•435 



•49 



•54 



•57 



•69 



•73 



(The 



Mean breaking weight of the three bars, S93 lb. 



