CEMENT—SET AT DIFFERENT TEMPERATURES.	573
MEAN RESULTS WITH 2-INCH CUBES—Continued.
Brand.		Composition.			Time of setting in air at temperature of—						Compres- sive strength
	Class.	Ce- 1 ment.	Sand.	Water.	0° F.		39° F.		70° F.		per square inch.
Bonneville improved.	Natural...	Neat. |		Per ct. 35.9 35.9	Mos.	Days.	Mos. 3	Days.	Mos.	Days. 7	Pounds. 1,880
							3			13	2,060
	Natural...	Neat.		35.9 35.9						15	800
										30	1,140
				35.9					1	7	1,250
				35.9					1	14	1,200
				35.9					2		1,190
				35.9 35.9					2	7	986
									2	14	1,070
				35.9					3		1,720
Hoffman —	Natural...	Neat.		35.7 35.7 35.7		6				1	169
						6				7	354
						6				14	540
				35.7		15				1	182
				35.7		15				7	460
		,		35.7		15				14	527
				35.7		20				1	168
				35.7		20				7	431
				35.7 35.7		20				14	624
						28				1	206
				35.7 35.7 35.7		28 28				7	406
										14	561
					3					1	276
				35.7	3					7	457
				35.7	3					14	579
	Natural...	Neat.		35.5 35.5				8			522
								8		7	842
				35.5				8		14	1,130
				35.5				14			649
				35.5				14		7	901
				35.5				23			549
				35.5				23		7	1,110
				35.5				28			744
				35.5				28		7	1,120
				36.2				31			952
				36.2				31		7	1,040
				36.2				31		30	1,170
				36.2			3				1,310
				36.2			3			7	1,230
				36.2			3			14	1,470
	Natural...	Neat.		35.5 35.5						8	628
										15	808
				35.5						23	980
				35.5						30	1,140
				35.5						35	1,170
				35.5					3		1,070
				35.5					3	7	1,270
				35.5					3	15	1,090
	Natural...	Neat.		38.0 38.0		30					1	341
						30				7	659
				38.0		30					30	850
				38.0	3					1	347
				38.0	3						7	558
				38.0	3					14	832
	Natural...	Neat.		38.2 38.2				30			656
								| 30		7	747
				38.2				30		30	1,190
				38.2 38.2			3				1,100
							3			7	1,190
				38.2			3			14	1,440
	Natural..	Neat.		37.9 37.9						14	744
										23	908
				37.9						37	1,040
				37. 9					2		1,030
				37.9					3		1,090
				37.9					3	7	924
				37.9					4		950