386 
Proceedings of the Royal Society of Edinburgh. [Sess. 
Table II. — Planished Steel Plates (Circular) — Deflections. 
The tabulated numbers are the pressures (lb. /in. 2 ) and corresponding deflections of the 
Plates A, B, C, D, E, F, the diameter d , the thickness £, and the deflections being in inches. 
Deflections at points distant from the circumference 
Plate. 
Pressure. 
JL 
1 . 
2. 
3. 
A 
10 
•004 
•007 
•013 
■016 
•022 
•021 
d = 6 
15 
•004 
•010 
•018 
•023 
•029 
•029 
£ = ■ 065 
20 
•0045 
•013 
•022 
•028 
•036 
•036 
25 
•008 
•019 
•029 
•040 
•053 
•052 
Plate. 
Pressure. 
Micrometer 
reading. 
Central 
deflection. 
Plate. 
Pressure. 
Micrometer 
reading. 
Central 
deflection. 
B 
0 
•273 
C 
0 
•287 
d = 6 
5 
•260 
•013 
d = Q 
5 
•261 
•026 
£ = •065 
10 
•251 
•022 
£ = •055 
10 
•246 
•041 
15 
•242 
•031 
15 
•232 
•055 
20 
•234 
•039 
20 
•220 
•067 
25 
•226 
•047 
30 
•217 
•056 
35 
•209 
•064 
E 
0 
•206 
40 
•201 
•072 
d — 5 
5 
•2015 
•0045 
45 
•189 
•084 
£ = •061 
10 
•1945 
•0115 
50 
•182 
•091 
15 
•188 
•018 
20 
•180 
•026 
25 
•175 
•031 
D 
0 
•315 
30 
•170 
•036 
d = 6 
5 
•301 
•014 
£ = •066 
10 
•291 
•024 
15 
•282 
033 
F 
0 
•309 
20 
•274 
•041 
d=4 
10 
•304 
•004 
25 
•266 
•049 
£=•067 
20 
•301 
•008 
30 
•259 
•056 
30 
•296 
•013 
35 
•253 
•062 
45 
•288 
•021 
40 
•247 
•068 
55 
•284 
•023 
45 
•240 
•075 
60 
•282 
•027 
70 
•279 
•030 
