400 Index. 



()lij>ortuiiisin, advocated by William I'otts, 297-298. 

 Origin ot Species, 3, 50, 359, 377. 

 OrtiKKienis, 162. 

 Osiris, 323. 



I'AI-^OLITHIC AGE, 53. 



I'aracelsus, 140. 



I'arker, Theodore, his sermon on the duties of milk-men, 273. 



Tarty-spirit, dangers of, 329-330. 



I'atent-oftice, its records illustrative of evolution, 203. 



I'atent rights, 207. 



Patents, 209-211. 



I'atriarchal system, as related to the evolution of government, 94. 



raul, his views of marriage, 84; on legalism, 18.5; the value of his truth, 2.">3; 



his belief in the speedy destruction of the existing social order, 20.3; his 



communistic teaching, 204. 

 I'entecost, Hugh O., on the anarchistic method of social reform, .'{03-318. 

 I'cricles, 87. 



I'errin, Raymond S., his philos<)i)hy, 31. 

 Perthes, Boucher de, his discoveries at Abl)eville, 4(i ; how they were received, 



52, 53. 

 Pestalozzi, his relation to education, 238-239. 

 Pharmac'v, as related to medical science, 145. 

 Philosophy, of evolution, its scope and principles, 3-26; cosmic philosophy, 7: 



synthetic philosophy, 7; of the unconditioned, 9; of agnosticism, 8-16; of 



materialism, criticized, 14-15 ; as related to ethics, 18-20 ; to sociology, 22-25 ; 



to the relativity of knowledge, 29-42. 

 Physiology, of sensation, 32-33 ; as related to medical science, 145. 

 I'ius IX., on the public schools, 242. 



Plants, protective armor of, 107-169, 172; social qualities of, 170. 

 I'lato, his ideaof a government by the governed, 99 ; his contempt for trade, 104 ; 



his dream of future progress, 107 ; characteristics of his age, 2;50 ; value of 



his truth, 2.");i; his ideal llei)ublic, 104, 284; on the cure of the soul, 334. 

 Pleistocene epoch, evidences of man's existence in, 47. 

 IMiocene epoch, evidences of man's existence in, 49. 

 Poietics, 206. 

 Politics, its relation to industry, 283, 330-331 ; to anarchism, 31.3, 314 ; to good 



government, 3.31-333. 

 I'olyandry, early evidences of, 57 ; its place in social evolution, 79-80, 83. 

 I'olygyny, early'evidences of, 57; its place in social evolution, 76-79. 

 I'oor-laws, 229. 



I'opular Science Monthly, 360, 383, 385, 380, 38X. 

 I'ottery, of i)rehistoric races, 60. 

 Potts, William, on the socialistic method, 277-300; his socialism endorsed by 



1). (i. Thompson, 321-322; on Asa (iray, 3<>0. 

 Poverty, evolution's word about, 22; as "related to the wages system, 224-2.'}3; 



primitive Christian views of, 201-260; as related to lan(i-morioi)oly, 287, 288; 



regarded as a social disease, .'J06-30. 

 Preaching, as a means of social reform, 272-273. 

 I'rimitive Christianity and education, 23<>-237. 

 Primitive man, 4.">-(;0. 

 Princii)les of Sociology, 159. 

 Profit-sharing, 297. 

 Prohibitory laws, 18.5. 

 ProtesUmtism, as related to the marriage (piestion, 85; to medical evolution, 



!. ; to education, 230, 240 ; to social reform, 267-269. 

 Psvcliolofrv, Princii)les of, 195, 19<;, 370, 377. 

 Ptcranodon, KvJ. 

 Pterodactyl, Hi3. 

 i'ublic schools, their origin, 240; manual training in, 240-241 ; Pius IX. on, 242; 



seculariziition of necessary, 24;i ; moral education in, 24.'i; advocated as an 



element in the scientific method of social reform, ;}34-3;J5. 

 Pythagoras, his relation to medical science, l.'Jo. 



(jiAKKKs, their non-resistance i>rinciples, 201 ; their industrial enterprise, 267. 



Uabki.ais, 2;S7. 



Ilaces of men, 48. 



Ilaymond, Dr. Kossitcr W ., his Xeo-Lamarckism, 4. 



Relativity of Knowledge, 29-42. 



