


46 REPORT—1843, j 
Box g. No. 6. Class No. 7, 















— 
. 


3 
ag 
Scn’ Hot or External seat Dim 
xtern i i i 
S| Commercial character of Iron, &c. Cold Character of How Srediie fa 
% “ Blast. Fracture. Cast. s= Ws, | Specimen. 
ge J 



in, in, i, 
i a ‘ 
£13 te Caldery Nowt. +3 op Hot |Close bright gray| Green| 7138 |5 x 5 X°75 
wyn, No. 2. + 43 Scrap... 
Box ¢. No.6. Class No. 8. 






1 Calder, No. 1. + } Pent- 
g 14-5 ae “4 sl Geant? Hot |Close bright gray| Green| 77168 |5 x 5 x 1 
I 
15 {4 ei AA all Hot |Close bright gray| Green| 7168 |5 x 5x1 
I 
Z 16)/4 3 mg Pie te Hot (Close bright gray} Green| 77168 |5 x5 x1 
3 pyle : | 
Bigs Saat ae seul Hot (Close bright gray|Green|} 7168 |5 x5 x1 
24 
£ 18/45 neliee its i pats aon | Hot |Close bright gray] Green| 7168 |5 x5 x 1 
Supplementary Table. 
No. of 
Experiment 
ha ae Protective Paint or Varnish. State of covering after 539 days’ exposure. 
Specimen. 
g14 Caoutchouce varnish ........s006...eeeeee Caoutchouc not visible, surface rusty...... 
g 14 Best white lead paint ............se008+ Paint destroyed in various blotches ...... 
g 15 Gopal. varnish scssvcssadseaesaatessacsenect Varnish still, smooth and shining......... 
g 15 Asphaltum varnish ........scessesseeees Varnish still, smooth and shining......... 
Z 16 WMastIG VAITUBIN sccssccsturesscssecesce= ste Varnish wholly invisible and gone......... 
2 16 WOEAISH tar ices ss spsctrsnssacashccasonce’ Tar still visible, but white and hydrated. 
17 Three parts wax + two parts tallow| Still visible and sound, but hydrated .... 
¢17 Coal-tar, laid on hot.........ssceeeeeeees Surface still black and shining, smooth... 
: : ih tine hydrated and_ part! 
Z 18 Turpentine varnish .........se0++ nese : paints sls, sete bi it veh : 
Drying Oil .......cceccscsccscsscencaecesses Surface still black and shining ............ 

