387
HELICAL SPRINGS,
COMPRESSION TESTS—Continued.
Remarks.
Closed down.
Closed down.
Closed down.
Closed down.
Description.	Height.	Load sustained.
	Inches.	Pounds.
Nineteenth spring		12.25	18,000
	9.75	45,500
	9.69	46,700
	9.75	45,000
	11.90	18,000
	12.25	13,580
Twentieth spring		12.27	18,000
	12.25	18,500
	9.75	46,500
	9.70	47,300
	9.75	46,500
	11.89	18,000
	12.25	14.400
I his spring was closed down and so remained results were as follows:		
	9,70	47,300
	9.75	46,000
	11.83	18,000
	12.25	13,620
	11.89	18,000
	9.75	46. 300
	9.70	47,300
	9.75	46,000
	11.84	18,000
	12.25	13,600
	10.25	39.500
This spring was loaded 100 times, compressing t time, after which the results were as follows:		
	10.25	39,180
	11.86	18,000
	12.25	13,700
	11.89	18,000
	9.75	47,000
	11.85	18,000
	12.25	13,480
Compression Test op Springs for 8-inch Carriage.
Springs made at Watertown Arsenal.
description op one spring.
	. 2.80
	. .50
	. 6.30
	. .40
3 pounds 4 ounces	
Exterior diameter of coil״
Diameter of bar.........
Height of spring unloaded
Distance between coils__
Weight..................
No. of spring.	Initial height unloaded.	Closed down.		Final height unloaded.
		Load.	Height.	
1		Inches.	Pounds.	Inches.	Inches.
2			2,600	4.17 4.20	6.03
3					6.00
4					6.10
5					4.16 4.26 4.16 4.11 4.09 4.15	6.05
6			2^740		6.10
7					6.11
8					6.12
9					6.03
10					6.12
11					5. 95
12					6.10
13			!?SO		5.93
14					6.00
15				4.15 4.15	6.05
16			3,000		5.96
	1				6.20