HELICAL SPKINGS,
386
COMPRESSION TESTS—Continued.
Description.	Height.	Load sustained.	Remarks.
	Inches.	Pounds.	
Eighth spring		12.25	17,700	
	12.21	18,000	
	9.75	45,600	
	9.63	47,200	Closed down.
	9.75	44,080	
	11.80	18,000	
	12.25	13,320	
Ninth spring		12.25	15,780	
	12.04	18,000	
	9.75	44,800	
	9.70	45,400	Closed down.
	9.75	43,800	
	11.70	18,000	
	12.25	12,660	
Tenth spring		12.25	17,560	
	12.17	18,000	
	9.75	45,500	
	9.68	46,200	Closed down.
	9.75	44,720	
	11.82	18,000	
	12.25	13,720	
Eleventh spring		12.25	18,000	
At 38.800 pounds the inner coil spring fractured at the second turn of coil..			
Twelfth spring		12.26	18,000	
	12.25	18,100	
	9.75	45,800	Closed down.
	11.87	18,000	
	12.25	14,340	
Thirteenth spring		12.38	18,000	
	12.25	19.740	
	9.75	48,000	
	9.65	49,700	Closed down.
	9.75	46,800	
	11.98	18,000	
	12.25	15,040	
Fourteenth spring		12.25	16,700	
	12.11	18,000	
	9.75	44,620	
	9.68	45,900	Closed down.
	9.75	43,800	
	11.72	18,000	
	12.25	12,340	
Fifteenth spring		12.25	16,520	
	12.09	18,000	
	9.75	42,800	
	9.55	45,200	Closed down.
	9.75	41,320	
	11.66	18,000	
	12.25	12,080	
Sixteenth spring		12.25	17,700	
	12.21	18,000	
	9.75	44,600	
	9.70	45,600	Closed down.
	9.75	44,300	
	11.83	18,000	
	12.25	13,800	
Seventeenth spring		12.25	15,080	
	11.98	18,000	
	9.75	44,200	
	9.67	45,000	Closed down.
	9.75	42,600	
	11.56	18,000	
	12.25	11,200	
Eighteenth spring		12.27	18,000	
	12.25	18,400	
	9.75	45,800	
	9.63	46,700	Closed down.
	9.75	44,760	
	11.85	18,000	
	12.25	14,200