rage. 
Portland cement — Continued. 
materials for, drying of 45-46 
excavating of, methods and 
cost of 41-43 
grinding and mixing of_ 43,46-53 
location of 17 
value of 16-17 
water in 44-46 
production of, comparison of 
gold production and 15-16 
diagram showing 16 
value of 15-16 
Portland cement, natural. See Nat- 
ural Portland cement. 
Portland Cement Co. of Colorado, 
plant of 124 
Portland Cement Co. of Utah, plant 
of 310-311 
Portland-cement plants, location of _ 60 
location of, map showing 15 
Portland Point. N. Y., limestone near, 
analyses of 252 
plant at 260-261 
Potomac, Md., plant at 343 
section near 185 
Pottersville, N. J., limestone near, 
analysis of 235,286 
Pottsville formation, occurrence and 
( • 1 1 a ra c t e r of 
Poxono Island. Pa., limestone near, 
analysis of 
Prairie Rock, Miss., chalk near, 
analyses of 
Proctor, Vt., marhle near, analyses 
of 
Productive Coal Measures, occurrence 
and character of 160- 
101, 164, 282 
Prospect, N. Y.. limestone near, 
analysis of 248-249 
Prospect Hill, Mo., plant at 
shale near, analysis of 
Prosser, C. S., on Nebraska forma- 
tions 220-230 
Prost, M. A., on slag cements 360 
Prussia, trass from 358 
Puzzolan cements, definition of 20, 357 
manufacture of 350-372 
materials for 357-359 
See also Slag cement. 
Pozzuolana, occurrence, character, 
and analyses of 357-358 
Pozzuoli, Italy, pozzuolana from 357 
Pyramid Lake, Nev., limestone near, 
analysis of 231 
Quarrying, methods and cost of 41 
Quincy, 111., limestone near, analyses 
of 134 
INDEX. 389 
Page. 
Rauchs Cap, Pa., limestone near, 
analyses of 280 
Ravine, Miss., sections at and near__ 214 
Raw materials, cost and methods of 
excavation of 4 1 4:i 
Reading Cement Co., plant of 284 
Red Buttes, VYyo., limestone near, 
analysis of 331 
Red Clay, Ga., limestone near, analy- 
sis of 127 
Red Hills, Miss., limestone near, 
analyses of 219 
Red Sulphur Springs, W. Ya.. lime- 
stone near, analysis of 327 
Redding, Cal., limestone near, analy- 
sis of 119-120 
Redstone limestone, occurrence of__ 282 
Renfrew, Mass., limestone near, anal- 
ysis of 189 
Rhode Island, limestone in, occur- 
rence and analysis of_ 
282 
281 
213 
311 
226 
R. 
iRathbun, Icwa, limestone near, anal- 
ysis of 161 
204- 
295 
Rhodes Mill, Ark., limestone at, 
analyses of 94 
Richmond, Pa., limestone near, anal- 
ysis of 282 
Ridgwood, Ark., clay from, analyses 
of 114 
Ridley limestone, occurrence and 
character of 305 
Ries, Heinrich, on Michigan shales_ 200-205 
on New York cement industry-- 350 
Ripley formation, character of 72 
Rising Fawn, Ga., limestone near. 
analyses of 129 
River Junction, Fla., limestone at, 
analyses of 120 
Roberts Mill, Ala., shale at, analyses 
of 67,70-71 
Roche Harbor, Wash., limestone near, 
analysis of 324 
Rock Point, Oreg., limestone near, 
analysis of 278 
Rock Run, Ala., shale at, analyses of_ 65, 71 
Rock Springs. Ala., limestone at, 
analyses of C>.'!. 69 
Rockland, Me., limestone and clay 
near, analyses of 177 
Rockmart, Ga., limestone and shale 
near, analyses of 129, 131 
plant at 127, 131 
Rockmart slates, occurrence and 
analysis of 131 
Rockwood formation, occurrence of__ 303 
Rocky Comfort area. Ark., chalk and 
marl from, analyses 
of 111-112 
location and character of_ 90-101, 115 
Rocky Point, N. C, limestone near, 
analyses of 268 
Rodman Furnace, Pa.. limestone 
near, analysis of 280 
Roes Bluff, Ala., limestone near, anal 
yses of 75. 82 
Rogers, Ark., limestone at, analyses 
of 97 
