Pyrourter No. 411. 
Wrought-iron sheath ; coil protected by casing of platinum foil. 
a Date, t @...|. Gy.) Ee Rig. | Byoy yo: | Observer. 
1873. 4 3 
1 21st July. 20:0 21:3] 11] 146 | 10-229 9:988 
Py te Red-hot 5 eee AG el aie? 3l He 
3. | 22nd July. 22:2 23:3} 11 | 415 | 10°716 | 10-409 
4, 29th Oct. 9 11-7 | 11 | 190 | 10:398 | 10:483 
Alternately 
5 | heated to red- 
: : ” ness and cooled 
-* four times. 
: 6. | 30th Oct. 85 12:0 | 11 | 229:5) 10-454 | 10-504 
fe Fi 3 Red-hot 4 hours.} ... | ... |... S33 oe 
8 3rd Noy 10 13°3 | 12 | 139-5) 11-049 | 11-053 
| Red-hot, a small 
quantity of red 
9. He oxide of iron call sss “ec ee te 
having been put 
inside sheath. 
10. 5th Noy. 12 13:0 | 12 | 157-5) 11:150 | 11-099 
11. a Red-hot 4 hours.} ... | ... age see ba 
12. 6th Nov. 11:5 13°75) 12 | 280-5) 11508 | 11-467 
1874. 
4 13. | 12th August. 17:23 18’ | 12 |1190 | 11-880 | 11-676 
14. | 13th August. 16:9 178 | 12 | 885 | 11:840 | 11:646 4, 
Pyrometer No, 414. 
Wrought-iron sheath ; coil protected by a casing of platinum foil, which was 
removed on 25th October, 1873, 
Inde 
No Date. | z. @ |G | E Rye Ryo 10: | Observer. 
7 1873. Pf 
il 23rd Jan. 9°6 12:8 | 10 | 990 9:900 | 9920] G.C.F. 
r : : Not 9 
| 2, | 25th April, 95 {|re,,| | 10,1300 | 9-924 x 
3 Pe Red-hot. ae cblinss aaa 32 ar oc 
4. | 2st July. 20:0 21-4} 11] 195 | 10-413 | 10-169 3 
5 » Red-hot Peet cee | etet (OD Teanlyt a tses W.G. 
6 22nd July. 21:8 22:3 | 11 | 472 | 10°749 | 10462} G.C.F 
Ve 25th Oct. 10 13:25] 11 } 206°5) 10-444 | 10:454 74 
8, 29th Oct. 9 11-7 | 11 | 198 | 10-421 | 10-455 C.L. 
9 93 Red-hot 4 hours.} ... | ... 268 36 he FA 
10. 30th Oct. 85 12:0 | 11 | 100-5} 10-881 | 10-923 ; 
Alternately heat- 
W 3 ed and cooled ok 453 
four times. , ites 
: 11| 8300 0:98 mean 
: par Sudhir: 10 aon { i9|'130-5| 10-985 | + 10°907 } i 
13. 5th Nov. 11-25 139 | 12 | 184-5) 11-017 |" 10-992 5 
14. 6th Nov. |Red-hot4hours.| ... |...) ... a ne ii 
; 15. ares oy. 10-25 130 | 12 | 147-5} 11-097 | 11-100 ie 
: 16. | 5th March, 10:7 125 | 12 | 144 | 11-077 | 11-064] O.J.L. 
, ive ” 10:9 125 | 12 | 145 | 11:083 | 11-064) GCF. 
18. | 10th March. 9:0 10:7 | 12 | 186°5) 11-030 | 11:063 | O.J.L. | 
19. 33 Red-hot 5 hours.| ... |...) ... | 333 ie 1" 
; 20. | 11th March, 75 99 | 12 | 134 | 11-014 | 11-090 ‘iunla | 
21. p Cipne 84 10:0 | 12 | 187-5} 11-037 | 11-086 re 
22. 7 9-4 87 | 12 | 143:8} 11-076 | 11-090 s | 
23. | 12th Augnst. 17:23 18:0 | 12 | 189 | 11-284 | 11:090 W.G. 
24, | 13th August. 16:9 17-9 | 12 | 186 | 11-273 | 11:089 5 | 
