INTERNAL STRAINS IN TREATED TUBE.
356
Measurement of Diameters Along the Bore.
TUBE INTACT.
Number.	Micrometer readings, diameters.					
	A.	B.	Mean.	A!.	B!.	Mean.
		Inch.	Inch.	Inch.	Inch.	Inch. ;
	.0127	.0077	. 0102	. 0122	.0106	.0114
	.0124	.0098	.0111	.0118	.0127	.01225
	.0121	.0092	.01065	.0128	.0127	.01275
	.0107	.0077	. 0092	. 0132	.0122	.0127
	. 0105	.0083	.0094	.0127	.0121	.0124
	.0112	.0092	.0102	. 0122	.0113	.01175
?		.0106	.0103	.01045	.0112	. 0115	. 01135
	.0084	.0092	. 0088	.0108	.0113	.01105
	.0100	. 0095	.00975	.0117	.0104	.01105
	.0088	. 0091	. 00895	.0112	.0107	. 01095
	. 0092	.0071	.00815	.0100	.0103	.01015
	.0086	.0090	.0088	.0093	.0105	.0099
	.0085	.0097	.0091	.0173	.0163	.0168
	. 0112	.0098	.0105	.0186	.0165	.01755
15		.0102	.0092	.0097	.0134	.0173	.01535
	.0091	. 0098	.00945	. 0168	.0178	.0173
	.0090	. 0095	.00925	.0172	.0173	.01725
	.0096	.0112	.0104	.0160	.0167	.01635
	.0122	.0103	.01125	.0168	.0177	.01725
	.0102	.0106	.0104	.0175	.0172	. 01735
	.0101	.0119	.0110	.0177	.0185	.0181
	.0107	.0104	. 01055	.0188	.0203	.01955
28		. 0100	.0117	. 01085	.0181	.0188	.01845
24 		.0111	.0102	. 01065	.0157	.0160	.01585
25		. 0162	. 0149	.01555	.0193	.0166	.01795
	.0187	.0177	.0182	.0195	.0204	.01995
27		.0222	.0217	.02195	.0163	.0193	.0178
TUBE CUT APART AT MIDDLE OF LENGTH.
The halves now measured as follows:
Number.	Micrometer readings, diameters.					
	A.	B.	Mean.	A!.	B!.	Mean.
		Inch.	Inch.	Inch.	Inch.	Inch.
1		.0143	. 0102	. 01225	.0142	.0132	.0137
2				.0126	.0107	. 01165	. 0122	.0136	.0129
3		.0117	.0092	.01045	.0132	.0128	.0130
4		.0102	.0076	.0089	. 0127	.0121	.0124
5		.0100	.0082	.0091	.0124	.0117	.01205
6		.0108	.0088	.0098	.0120	. 0112	.0116
7		.0104	.0102	.0103	. 0112	.0114	.0113
8		.0084	. 0091	.00875	. 0109	.0113	.0111
9		.0102	.0095	.00985	.0118	.0107	.01125
10		.0092	.0091	.00915	.0114	.0109	.01115
11		.0093	.0073	.0083	.0104	.0106	.0105
12		0087	.0092	.00895	.0097	.0108	.01025
13		\ 0088 ■	. 0097	.00925	.0177	.0167	.0172
14	v		. 0113	.0099	.0106	.0188	.0167	.01775
15		. 0102	.0093	.00975	.0137	.0177	. 0157
16		.0094	.0100	.0097	.0170	.0182	.0176
17		. 0092	.0095	. 00935	.0175	.0177	.0176
18		.0098	.0113	.01055	.0162	.0167	.01645
19		.0123	.0103	.0113	.0172	.0182	.0177
20		.0104	.0106	.0105	.0178	.0172	.0175
21		. 0102	.0120	.0111	.0182	.0188	.0185
22		.0108	.0106	.0107	.0192	.0206	.0199
23		.0103 '	.0118	.01105	.0184	.0192	.0188
24		.0114	. 0103	.01085	.0161	.0163	.0162
25		.0164	.0150	. 0157	.0197	.0163	.0180
26		.0191	.0177	.0184	.0198	.0209	.02035
27		.0224	.0220	. 0222	.0167	.0197	.0182