562	CEMENT--SET AT DIFFERENT TEMPERATURES.
DETAILS OF COMPRESSION TESTS OF SPECIMENS WHICH WERE EXPOSED TO 70״ F. TEMPERATURE ONLY WHILE SETTING—Continued.
Marks.	Brand of cement.	Composition.			Time of setting in air at temperature of 70° F.	Dimensions.			Sectional area.	Ultimate strength.			Remarks.
		Ce- ment.	Sand.	Water.		Height.	Compressed surface.			Total.	- Per square inch.	Mean.	
					Days.	Inches.	Inches.	Inches.	Sq. inches.	Pounds.	Pounds.	Pounds.	
J.F. 20		Josson		Neat.		26.0	30	2.03	2.01	2.05	4.12	12,250	2,970		
						2.00	1.99	2.04	4.06	16,350	4,030		
						2.03	1.98	2.02	4.00	13,900	3,480		
						1.97	2.02	2.01	4.06	16,300	4,010	3,730	
				26.0	35	1.99	2.03	2.02	4.10	17,900	4,370		
						2.00	2.01	2.06	4.14	12,320	2,980		Corners gone.
						1.99	2.03	2.04	4.14	10,900	2, 630		Do.
						2.00	1.98	2.02	4.00	12,050	3,010		
						2.00	2.01	2.00	4.06	13,100	3,230	3,240	
		Neat.		26.0	37			2.05	4.06	13,150	3,240		
						2.00	2.00	2.07	4.14	11'980	2,890		
						2.00	1.99	2.05	4.08	14,020	3,440		
*						1.99	2.02	2.02	4.08	14,100	3,460		
						2.01	2.00	2.02	4.04	15,400	3,810	3,370	
		Neat.		26.0	43			2.03	4.02	16,400	4,080		
						2.01	1.99	2.04	4.06	9,800	2,410		
						1.99	2.09	2.00	4.18	13,100	3,130		
						2.02	1.98	2.06	4.08	13,350	3,270		
						2.00	2.01	2.03	4.08	15,700	3,850	3,350	
				26.0	90	1.97	2.03	2.03	4.12	14,950	3,630		
						1.98	2.00	2.08	4.16	13,640	3,280		
						2.03	1.99	2.03	4.04	10,700	2,650	3,110	
Stl. F. 21		Steel		Neat.		84.4	15	2.00	2.02	2.04	4.12	4,530	1,100		
						2.03	1.99	2.05	4.08	4,250	1,040		
						2.06	2.01	2.04	4.10	5,280	1,290		
						2.01	1.99	2.06	4.10	4,970	1,120	1,160	
				34.4	21	2.02	1.98	2.06	4.08	5,580	1,370		
						1.98	2.01	2.06	4.14	5,070	1,220		
						1.99	2.01	2.09	4.20	4,960	1,180		
						2.03	1.98	2.06	4.08	5,020	1,230		
						1.99	2.01	2.07	4.16	5,060	1,220	1,240