288 
— 
No. of 
Experiment 
and mark of 
Specimen. 
y 12 
y 13 
REPORT—1840. 
i] 
Box y. No. 3. Class No. 6.' 
2. 3. 4. Fis 
Specific 
Hot or External Gravity of | 
Commercial Character of Iron. Cold Character of | How Cast.| Specimen | 
Blast Fracture. s 
No. 2. Doulais. Common bar ...|... vo Fibrous Green 7587 | 
Box y. No. 3. Class No. 7. Gray Cast Iron, 
i he CRS oat Bes Close bright gray| Green 7-138 
3 ee eeeeeee 
} Hot 
Box vy. No. 3. Class No. 8. Gray Cast Iron, 
alice. 
y 14 
y 15 
y 16 
77 
y 18 
No. of 
Experiment 
and mark of 
Specimen. 
— tet 
an > 
RITA ITN SS ASTRO SENS? NOSE 
— 
o 
{4 Pela ta ea oe + alee Hot |Closebright gray| Green 7-168 | 
Be SCTAP cacevsece | 
i 
{# i gan Bal eto Closebright gray| Green 7-168 | 
3 eeeeeeeee ‘ 
ie hence sce sli Hot |Closebright gray| Green 7168 | 
3 seen eeee i 
+4 Dh eae Se tee Hot |Closebright gray} Green 7168 | 
3 Scrap ......00. 
4.No. 1. Calder + 4No. 2. - : 1 
12 Pentweyti 4 Gerap cscssds: Hot |Closebrightgray| Green 7168 
Supplementary Table y. 
Protective Paint or Varnish. State of Covering after 117 days’ exposure. 
Caoutchouc varnish ...... Oaonancooe 
Varnish not visible ........csssssesesssesesssees 
Best white-lead paint...............| Paint stripped off in places.........sescsscssees 
Copal varnish ............+ sesvscecoee| Warnish nt Visible. ...sescosseccecccseseoes esti 
Asphaltum varnish.............00+ -.| Varnish scarcely visible. ........+seseesseseenees 
Mastic varnish .....cscecssessesceeees Varnish not visible. ..........s.c0ccsoscasascssail 
Swedish tar.......ssseseerseees seeeeee| A trace still remaining ....... ccvccrtecv cca 
3 parts wax and 2 parts tallow ...| Converted into adipocere........scescsseseceneee 
Coal-tar, laid on hot ...............| Still visible in some places .........scseeeeeusee 
Turpentine varnish.............2+0+ Varnish not visible ....... cabaveas atawaed oocssaan 
Drying oil ..... scnstarvesesledccscs o«| INOtivisible,....0...sescsscasscassoveorsecuce estan 
