550	CEMENT—SET AT DIFFERENT TEMPERATURES,
DETAILS OF COMPRESSION TESTS OF SPECIMENS EXPOSED TO 39° F. TEMPERATURE WHILE SETTING, AND SUBSEQUENTLY AT 70° F—Continued.
Marks.	Brand of cement.	Composition.			Time of setting in air at temperature of—		Dimensions.			Sectional area.	Ultimate strength.			Remarks.
		Ce- ment.	Sand.	Water.	39° F.	70° F.	Height.	Compressed surface.			Total.	Per square inch.	Mean.	
						Days.	Inches.	Inches.	Inches.	Sq. inches.	Pounds.	Pounds.	Pounds.	
		Neat.		26.0	30	13	2.00	1.98	2.08	4.12	20, 650	5,010		
							1.99	1.99	2.02	4.02	24,200	6,020		
							1.99	1.96	2.06	4.04	22,300	5,520		
							1.98	1.98	2.06	4.08	19,980	4,900		
							1.96	2.10	2.05	4.31	25,300	5,870	5,460	
		Neat.		26.0	43		2.05	1.92	2.02	3.88	15,200	3,920		
							1.99	1.98	2.10	4.16	17,700	4,250		
							1.99	1.98	2.06	4.08	18,100	4,440		
							2.00	1.99	2.06	4.10	18,950	4,620		
							1.99	1.99	2.08	4.14	19,300	4,660	4,380	
J. F. 20			Neat.		26.0	90	0	1.99	2.04	2.01	4.10	21,600	5,270		
							1.97	2.02	2.03	4.10	19,000	4,630		
							2.02	2.03	1.97	4.00	21,720	5,430		
							1.98	2.02	1.98	4.00	18,400	4,600		
							2.01	2.05	1.99	4.08	20,200	4,950	4,980	
		Neat.		26.0	90			2.01	1.98	3.98	22,440	5,640		
							2.02	2.02	1.94	3.92	23,300	5,940		
							1.97	2.00	2.05	4.10	17,400	4,240		
							1.97	2.06	1.96	4.04	19,380	4,800		
							2.00	2.05	1.97	4.04	17,010	4,210	4,970	
		Neat.		26.0	90	14	2.04	2.02	1.98	4.00	22,900	5,730		
							1.99	2.06	1.99	4.10	22,700	5,540		
							2.04	2.01	2.00	4.02	22,880	5,690		
							2.02	2.03	1.94	3.94	23,500	5,970		
							1.99	2.06	1.98	4.08	17,000	4,170	5,420	
		Neat.		34.4	15	0	2.00	2.04	1.96	4.00	3,620	905		
							1.96	2.00	2.03	4.06	3,980	980		
					1		2.00	2. 01	2.04	4.10	3,810	930		
					־'־1			1.97	1.96	2.04	4.00	3,690	923		
							1.98	1.96	2.06	4.08	3,640	892	926