180
APPENDIX YI
F'Ri
I;
ir,'
FORMULAS AND TABLES FOR AECH BRICKContinued
Firebrick Arches; Rise, Length, Radius, for Chord of Unity
I
s,' t
No.l
No. 2
No. 3
No. 4
No. 5
No. 6
No. 7
No. 8
Rise or Middle Ordinate Decimal of Span or Chord
Logarithm of Rise or Middle Ordinate
Rise or Middle Ordinate Inches per 1 Ft Span or Chord
Arc
Length of Arc
Logarithm of Length of Arc
Eadius of Arc
Logarithm of Eadius of Arc
V
logy
V
a, Degrees,
Minutes and Seconds '
b or c
logb logc
r or r'
log r log/
0.1146 0.1150 0 1167
9.09512 9.0.6070 9 06664
M
51-38-13 51-48-39 . 52-30-00
1.03466 1.03490 1.03593
0.01476 0.01490 0.01533
1.1481 1.1445 1 . 1305
0.05996 0.05860 0.05326
0.1172 0.1198 0 1200
9.068S8 9.07843 9 07918
Iff 1&
52-46-04 53-53-47 53-58-58
1.03623 1.03784 1 03797
0.01546 0.01613 0 01619
1.1252 1.1033 1 1017
0.05121 0.04270 0 04205
0.1224 0.1250 0.1276 0 1300
9.08777 9.09691 9.10586 9 11394
1*1 H l»
55-01-11 56-08-42 57-15-54
58-17-48
1.03949 1.04116 1.04287 1 04447
0.01682 0.01752 0.01823 0 01890
1.0825 1.0625 1.0434 1 0265
0.03442 0.02633 0.01846 0 01138
0.1302 0.1328 0 1340
9.11464 9. 12324
9 12702
1* i»
58-22-57 59-29-50 60-00-00
1.04461 1.04638 1 04715
0.01895 0.01969 0 02002
1.0252
1.0077 1 0000
0.01079 0.00332 9 00000
0 1350
9 13033
60-26-18
1 04792
0 02033
0 9934
9 99714
0.1354 0.1400
9.13167 9 14613
if
60-37-28 62-43-28
1.04820 1 05147
0.02040 0 02180
0.9907 0 9607
9.99593 9 98259
0.1406 0 1450
9. 14806 9 16137
i»
62-49-26 64-41-19
1.05190 1 05516
0.02197 0 02332
0.9594 0 9346
9.9&198 9 97061
0.1458 0 1500
9.16386 9 17609
H
65-01-39 65-47-30
1.05576 1 05869
0.02357 0 02488
0.9302 0 90S5
9.96859 9 95825
0. 1510 0 1517
9.17910 9.18091
1H
67-13-02 67-30-00
1.05973 1 06034
0.02520 0 02545
0.9033 0 9000
9.95584 9 95423
0 1550
9 19033
68-53-37
1 06288
0 02649
0 8840
9 94643
0.1563 0 1500
9.19382 9 20412
if
69-26-13 70-58-44
1.06392 1 06693
0.02691 0 02814
0.8779 0 8613
9.94344 9 93513
0.1615 0 1650
9.20806 9 21748
IB
71-36-06 73-03-06
1.06816 1 07109
0.02864 0 02983
0. 8547 0 8401
9.93184 9 92432