Material*.

Cements and MIxtures.

Value.

Lb..

Delafield and

Stiff paste............

6.*

High Falls (N. Y.), 270 days.

Pure........

11.3

James River.....

Cement.............

5.9

Sand................

James River, 59 days.....

Cement...........

1.9

Water......... 2.6

Cement.............

3.4*

Water......... 14

Portaland (Eng)

320 days........

Pure cement......

10.6

Cement..........

6.6

Sand............

Materials.

Cements and Mixtures.

Value.

Lb*.

Portland Pure

(Eng.). 100. days ...........

Cement 1

12.5

Sand ... 1

13.

Cement 1

8-5

Sand ... 2

Roman (Eng.),

100 days........

Cement 1

4.

Sand ... 1

Rosendale, 95 days ............

Pure........

7.

Cement 1

6.7

Lime..¼

Cement 1

3.9

Lime... 1

Rosendale (Hoffman), 830 days

Stiff paste...

4.4*

Thin "

4.8*

• All except the first ware submitted to a prewar of 321bs. per square inch.

Cement.

Value.

Pure..

Cement

Sand I.

Lbs.

Lbs.

Akron, New York..........

5.2

44

4 1

Brighton and Rosendale.

4.9

S'8

34

Cumberland, Va...........

6.5

6S

3.8

James River, Va...........

...

4'2

44

Newark and Rosendale.

58

3'8

3.4

Portland, English............

10.5

8.6

6.5

Remington, Conn...........

65

4.8

3-4

Cement.

Value

Pure

Cement. 1

Sand 1.

Cement. 1 Sand 2

Lbs.

Lbs.

Sandusky, Ohio...........

..

41

...

Rosendale, Hoffman......

5.8

4 1

...

" Lawrence..........

53

...

...

Sandusky. Ohio............

3.8

3.2

...

Shepherdstown, Va...

61

4.2

3.1

Utica, Ill........................

51

1.2

3.8

Note

When the paste is not subjected to compression during setting, a thin paste produces as strong a mortar as a stiff one.