496	CEMENT AND MORTAR CUBES.
Compression Tests of Cement and Mortar Cubes—Continued.
Brand of cement.	Composition.			Age.	Weight.			Dimensions.			Sectional area.	First crack.	Ultimate strength.		Remarks.
	Ce- ment.	Sand.	Water.		Total.		Per cubic foot.	Height.	Compressed surface.				Total.	Per square inch.	
			Per cent.	Days.	Lbs.	ozs.	Pounds.	Incites.	Inches.	Inches.	Sq. inches.	Pounds.	Pounds.	Pounds.	
			26.0	Î3	135	8	135.5	12.05	12.03	11.92	143.40	598,000	676,000	4,714	5 hours retarded, agitated.
Do				24.8	13	135	0	135.5	12.04	12.06	11.86	143.03	561,000	781,000	5,460	2 hours retarded, at rest.
															f2 hours retarded, agitated.
															Sustained 810,000 pounds
Do				23.6	13	136	0	135.9	12.07	12.07	11.87	143.27	740,000	810,000	5,654	1 without rupture. Load
													795,000	5,549	1 released and reapplied
															when rupture occurred
															{ under 795,000 pounds load.
			26.5	8	130	8	130.6	12.07	12.08	11.84	143.03	370,200	370,200	2,588	
			27.0	8	127	0	129.2	12.04	12.03	11.73	141.11	. 175,700	181,000	1,283	
	״... Do			23.1	8	133	0	130.9	12.06	12.05	12.08	145.56	135,300	135,300	930	Mixed with hot water.
			29.4	13	124	8	128.4	12.02	12.02	11.60	139.43	402,100	402,100	2,884	
Do				42.2	13	113	4	114.2	12.05	12.05	11.81	142.31	171,000	171,000	1,202	Do.
			27.5	8	125	8	128.1	12.07	12*09	11.60	140.24	217, 000	217,000	1,547	
Do				25.0	13	130	0	130.9	12.03	12.04	11.85	142.67	282,400	282,400	1,979	
			29.7	13	123	8	128.1	12.09	12.03	'11.45	137.74	349,000	349,000	2,534	
			35.6	8	m	8	112.6	12.02	12.08	11.78	142.30	169,600	169,600	1,192	
Do				32.9	8	116	4	115.3	12.06	12.03	12.00	144.36	98,700	101,200	701	Do.
			40.0	13	119	0	118.8	12.05	12.06	11.91	143.63	52,000	52,000	362	
Bonneville Imported		Neat.		37.6	8	111	8	110.8	12.09	12.04	11. 95	143.88	95,200	95,200	662	
Do				47.2	8	107	4	106.5	12.05	12. 00	12.03	144. 36	20,500	20,500	142	Do.
			36.5	8	116	0	115.1	12.00	12.03	12.06	145.08	49,700	50,700	349	
			41.8	9	111	0	112.0	12.05	12. 04	11.80	142.07	73,200	75,100	528	
Do				43.8	9	111	8	111.0	12.04	12.00	12.02	144.24	31,600	31,600	219	Do.
			35.0	13	117	8	116.7	12.05	12.07	11.96	144.36	121,200	121,200	840	
			44.6	13	109	0	107.5	12.04	12.09	12.04		101,800	101,800	699	
Do		Neat.		46.2	13	107	12	106.9	12.04	12.05	12.00	144.60	59,600	59,600	412	Do.