627
STRENGTH OF GLASS,
Details of Transverse Tests.
Lights supported at the ends, loaded at the middle.
ROUGH PLATE. 24-INCH SPAN.
Dimensions.		Ultimate strength.		Deflec- tion.
Width.	Thick- ness.	Total.	Modulus of rupture per square inch.	
Inches.	Inches.	Pounds.	Pounds.	
7.96	.13	22	5,890	.36
7.98	.15	39	7,820	.31
8.00	.20	59	6,640	.25
7.92	.21	51	5,260	.17
8.05	.26	112	7,410	.23
7.93	.30	125	6,310	.18
8.00	.37	145	4,770	.11
7. 93	.37	177	5,870	.14
7.98	.50	286	5,160	.10
7.98	.51	244	4,240	.07
7.97	.72	446	4,890	.05
8.00	.72	552	6,030	.06
7.97	1.01	908	4,020	.04
7.94	1.07	946	3,750	.04
Nominal
thick-
ness.
Inch.
Description.
Factory.
Lehr annealed ...
---do.........
—do..........
---do.........
— do..........
—do...........
—do...........
...do.........
Oven annealed...
...do.........
...do.........
...do.........
...do.........
...do..........
Appert..............
Mississippi.........
Appert..............
Mississippi.........
Appert..............
Mississippi.........
Appert...........
Mississippi......
(Not known)......
ROUGH PLATE. 16-INCH SPAN.
X	8.00	.14	28	4,290	.11
	7.98	.15	40	5,350	.13
	8.01	.20	83	6,220	.13
is	7.97	.22	97	6,030	.11
	8.00	.26	88	3,900	.06
£	7.98	.26	121	5,380	.09
	7.99	.39	294	5,810	.06
i	7. 96	.39	258	5,110	.06
è	8.00	.54	388	3,990	.03
3	7.99	.56	330	3,160	.04
i	7.94	.78	858	4,260	.02
i	7.96	.78	949	4,700	.03
1	7.96	.96	520	1,700	
1	7.95	.95	1,160	3,880	
Appert	 Mississippi		Lehr annealed ...
	
Mississippi		
Appert		
		do...
	
	
(Not known)		Oven annealed...
	
	
	
	
	
ROUGH PLATE. 8-INCH SPAN.
i	8.00	.21	163	5,550	
	7.98	.25	217	5,220	
y	8.01	.22	197	6,100	
1	7.95	.24	254	6,660	
$	8.02	.39	650	6,390	
1	7.97	.38	498	5,200	
5	7.95	.56	556	2,680	
5	7.98	.53	432	2,310	
i	7.97	.72	1,410	4,100	
1	7.98	.72	1,240	3,600	
1	7.99	1.04	1,810	2,510	
1	7.95	.99	1,730	2,660	
Lehr annealed .
...do.......
...do.......
---do.......
---do.......
---do.......
Oven annealed.
___do.......
---do.......
—do.........
—do.........
—do.........
Appert........
Mississippi ...
Appert........
Mississippi ... (Not known).
RIBBED PLATE. 24-INCH SPAN.
	8.01	.15	24	4,790	.28
8	7.95	.15	28	5,630	.35
*	8.00	.27	111	6,850	.21
	7.95	.27	111	6,890	.21
I	7.99	.39	174	5,150	.11
8	7.97	.38	168	5,250	.11
Lehr annealed .
---do.........
---do.........
---do.........
---do.........
---do.........
Appert......
Mississippi .
Appert......
Mississippi .
Appert......
Mississippi .