Port Jefferson Harbor, N. Y. 549 



Mahon, Del. 1255 



Washington, N. Y. 16, 899 



Portion, edible 154, 1677, 1678 



Portland, Me. 632, 690, 1734 



Portsmouth Harbour, England 89, 90 



Position, regulate vertical 1309 



Possibilities 97 



Possible 150 



Post-cercarial form 332 



-setting fate 736 



-treatment 532 



Postlarvae 1323 



, metamorphosing 1174 

 Postlarval culture unit 296 



feature 1174 



stages 638 



Postural behavior 1319 



Potassium 401, 402, 534, 1813, 1903, 1940 



chloride 372, 1200, 1639 



cyanide 263, 325 



-mediated cholinergic response 2114 



nitrate 1838 



phosphate buffer 1200 



Potency may be increased or decreased 700 

 Potential 82, 287, 339 



, greatest 421 



Potomac River, Md. and Va. 410 

 Pounds per square foot 687 

 Power 1418 



plants/power stations (see also electric generating station) 93, 97, 99, 102, 



440, 536, 651, 989, 1527, 1528, 1597, 1770, 1930 

 project, hydroelectric 1002 



Practical 150 



Practices, current 148 



Prasinoaladus 991 



Precambrian 1431 



Precipitate, amorphous 612 



Precipitated 2083 



Predation 211, 270, 271, 278, 293, 301, 380, 469, 638, 652, 657, 666, 667, 

 797, 826, 828, 1042, 1112, 1179, 1192, 1194, 1237, 1294, 1520, 1604, 1646, 1778, 1780, 

 1887, 1904, 1905, 1928, 1931, 1932, 1934, 1935, 1952, 1998, 2061 



, avoidance of 95, 481 



by crabs 540 



snails 2232 



, exposure to 504 



, extensive 9 64 



, greatest resistance to 271 



776 



