198 



THE CIVIL EKGINEER AND ARCHITECT'S JOURNAL, 



[Jl'NE, 



■•T / Crous/iat) flVehhJ Ko. 1 — Cold Blast "1 in egiial proper- 



'• \ CoalOrookdale, No. I— Cold lilaat j lions. 



Wi-JRlit applied Dofleclion. Sfct. 

 in Jljs. 



f 400 -3 



I 518 -39 



I GSI -50 



1 . (jrej- ; free open rnetal \ fih6 -oS 



I 712 -fiS 



I +770 -71 



I. B'JST -'je 



f 400 -33 -04 



518 -44 -05 



:; IMetal dark-bluish grpy ; soft and ( 030 -58 -08 



oiica ai cenire of bar. 'j 080 '00 



-f714 -70 



*- B7Gn -775 



I 400 -31 -02 



I 518 -415 -03 



I 030 -55 



3 Melal as No. 2 bar { Geo -02 



I 714 -005 



I +742 -71 



(_ B880 -92 



^ 400 -34 -03 



518 -45 -05 



. . V I 1 . J ! 030 -585 



4. As preceding bars, d; r'i and open . . ■{ q„„ .g^ 



I +714 -715 



*- B 837 -92 



Mean breaking weight of the four bars, 855 lb. 



\n. TAe Scrap iron tiscd was principally old mill cant Ivrjs, such as shafts^ 



hammers, rolls, dfc, chiefly of Welsh Cold blast iron, 



V-^lalvfera, No. ;^— Anthracite 40 ports ... 



Il-dsdale, No.a— Hot DIast 40 „ I 



Crawshay, No. 1. Cold litast 40 „ I Mixture of ir3n 8elec*e(i for casting the 



Hlaenavon, No. 1— Cold Ulast JO „ f" arcli ribs of tlie Bigli Level Bridge. 



Coalbrook-aale, No. 1— Colli Blast HO „ 



Serap, selected (clean) ;^o „ J 



FIRST CIST. 



Defective near the centre of bearing 

 thus : 



(Half size), short of metal in casting. 



r 



2. Defective in like manner to No. 1 I 

 I'Hr. Metal clear, close grained, and -( 

 even. I 



L 



406 

 518 

 030 

 CSO 

 742 

 798 

 82G 

 B854 



400 

 518 

 030 

 080 

 742 

 798 

 + 820 

 B8S0 



Mean breaking weight of the two bars, 870 lb. 



SECOND C.iST. 



r 



I. Colour dullish grry. Fracture close / 

 and even. 



400 

 518 

 G30 

 080 

 742 

 770 

 798 

 + 826 

 I^B 1043 



r 



2. Light silvery grey colour: close 

 grained and uniform. Bar full in 

 size, 1 Jj wide by \-^ deep. 



Breaking weight, 1000, reduced to one 

 inch square. 



400 

 518 

 030 

 fi.s6 

 742 

 798 

 8'20 

 854 

 + 8S2 

 1198 



3. Fracture as No. 2 bar, in colour, &c. 

 Bar full iu size, 1 Jj wide by 1 deep. 



Breaking weight, 1072, reduced to inch 



square. 



Mean breaking weight of the three bars, 1058 lb. 



Xlll. Second melling, from the metal of a defective rib-piece, without any 

 addition of new "pig." 



1. White metal; fracture crystalline;" 

 very hard; and radiating thus: — 



I- 400 

 I BSld 



406 



518 



532 



B 540 



406 

 L B518 



XIV. Metal same as No. 12 selected for the bridge ribs. 

 Abbot and Co.J 



CAST FROM THE CIPOL*. 

 (- 406 

 518 

 039 

 6S0 

 742 

 798 

 826 

 +854 

 B884 



1. Bar very defective on top side. Metal 

 dull, giey, close, and uniform. 



Iron close and uniform, of a dull light 

 grey colour. 



L 



406 

 518 

 030 

 080 

 742 

 798 

 820 

 + 854 

 B928 



Mean breaking weight of the two bars, 900 1 



CAST FROM THE AIR Fl'RNACE, 

 f 400 

 518 

 030 

 086 

 742 

 798 

 826 

 + 854 

 IB 1023 



, Iron very similar in colour and ap- 

 pearance to the two preceding bars. 



2. Bar very defective, or the result would 

 have been very great. 



r 



L 



400 

 518 

 030 

 086 

 742 

 798 

 826 

 + 854 

 B891 



Mean breaking weight of the two bars, 957 lb. 



XY, Mix/lire for Railway Chairs. 



^th part Crawshay, No. 1 — Cold Blast. 

 '^rd part Redsdale, No. 3— Hot Blast. 

 %thpart Scotch, No. 1 and 5— Hot Blast. 



r 



I. IMefal mild and open,of adark bluish- 

 grey. Slight defect on top of bar. 

 Bar rather full in size. 



