Peninsulas, how the drowning of rivers helps to make them, [212]
Pennsylvania, autographs left by ancient reptiles in the sandstone under the coal seams, [245]
Perched boulder, in Bronx Park and its autograph on its rock-bed, [250]
Quartz, how it helps to make the pebble jewel-boxes—the geodes, [101]
Quartzite, (defined), [98]
Rain, what fossil rain-drops tell of ancient weather, [224]
Rat, desert, [186]
Reclus, on the motion of glaciers, [62];
on the mountain whirlpools of stones, [141];
on the severity of lake storms, [202]
Reefs, coral, how the sea helps the little people build them, [225]
Reptiles, with bird feet, [246]