Peavey, F. H., [214]

Pennsylvania Railroad, [158];
see also [Baggage Case]

Pericles, mills in time of, [236]

Peterborough, N. H., [50]

Photography, [49]

Pillsbury, Minneapolis miller, [236]

Pittsburg, Pa., [74]

Platform on Reaper, origin of, [33]

Plow, hillside, [45], [81]

Plow, iron, thought to poison soil, [5];
invention of, [49]