1916] Index to Volumes I to XXXI 201 



VOL. PAGE 



Oak, a new post oak and hybrid oaks, Ashe 11 87 



Oak, seedlings of the live oak and white oak, Cokee 28 34 



Oates. William Mercer 



The bromination of anthranilic acid (with A. S. 



Wheeler) 26 26 



Octylbenzol, deSchvteinitz 3 60 



Oleoresin, resenes, Herty and Dickson 28 131 



Ornithological work in North Carolina, Pearson 24 33 



Orr, Manlius 



Rapid determination of oil in cotton-seed products (with 



C. H. Herty and P. B. Stem) 25 21 



Palaeotrochis, nature. White 11 50 



Palaeotrochis, origin, Diller 16 59 



Panicum, dichotomous groups, Ashe 15 22 



Parabola, chord common to a parabola and the circle of 



curvature at any point, Graves 5 14 



Parabola, focal chord, Graves 5 15 



Patterson, Andrew Henry 



The "pinch-effect" in undirectional electric sparks 24 145 



The probable electrical nature of chemical energy 25 62 



An experimental proof of inverted retinal images 28 42 



Peanuts, occurrence of citric and malic acids, deSchweinitz 2 47 

 Pearson, Thomas Gilbert 



Nesting habits of some southern birds in eastern North 



Carolina 15 17 



Preliminary catalogue of the birds of Chapel Hill, N. C, 



with brief notes on some of the species 16 33 



Ornithological work in North Carolina 24 33 



Pegram, William Hoavell 



The problem of the constitution of matter 27 87 



Peridotites of western North Carolina, Pratt and Lewis .... 22 8 



Peridotites of the southern Appalachians, origin, Lewis .... 12 11 24 



Periodic law, use in teaching, Venable 13 30 



Periodic system, present position, Venable 13 34 



Periodic system and Richter, Venable 17 I 19 



Petrified human body. Holmes and Harris 2 59 



Pharmacology, relation to clinical medicine, MacNider 26 93 



Phase rule and inorganic chemistry, Bancroft 20 39 



Phenogodes laticollis, Horn, female form, Atkinson 4 II 92 



Phillips, Charles 



A sketch of Elisha Mitchell 1 9 



Phillips, James 



Meteorological record at Chapel Hill, 1844-1859 1 35 



Dates of the flowering of plants (with K. P. Battle and 



R. H. Battle) 1 45 



