W16] 



Index to Volumes I to XXXI 



209 



Tornadoes, Gore 1 



Tortoises, box, of southeastern North America, Bbimlet. ... 20 

 Tourmaline, chemical constitution as interpreted by Pen- 

 field, Foote and Clarke, Pbatt 17 



Transition curve, Caijst 8 



Transpiration of plants, Venable 2 



Trees, twisting. Holmes 2 



Trichlorethylidene-di-p-nitrophenamine, derivatives, Wheel- 

 er and Glenn 19 



Turpentine and rosin, Phillips 6 



Turpentine, production by the long-leaf pine, Herty 21 



Turpentine, spirits, optical rotation, Herty 24 



Turpentine, isoprene, Herty and Graham 80 



Turpentine, spirits, adulterated, Hinsdale 7 



Turtles of the genus Pseudemys, Brimley 23 



Urine, determination of sugar, Howe 2 



Vanadium, occurrence in peats, Baskerville 16 



Valence, the nature of valence, Venable 16 



Vanillin, condensation with certain aromatic amines, 



Wheeler 29 



Venable, Charles Scott 



The reduction of naphtazarine (with A. S. Wheeler) . . 29 

 Venable, Francis Preston 



President's report for 1884 



"Fall of blood" in Chatham County 



Zinc in drinking water 



Hydrated carbon bisulphide 



Temperature of well-waters in Chapel Hill 



The storm of April 22, 1883 



Caffein in yeopon leaves 



Filters washed with hydrofluoric acid 



Action of gasolene on copper 



Analysis of the leaves of Ilex cassine 2 



Meteorological record at Chapel Hill for the five years, 

 1880-1884 2 



Certain reactions of phosphorous 2 



Some notes on plant transpiration 2 



Some attempts at forming heptyl-benzol 2 



A sketch of the life and scientific work of Lewis David 

 von Schweinitz 3 



Meteorological record at Chapel Hill for the year 1885. . 3 



A thermometer for class illustration 3 



Analysis of water from the artesian well at Durham, 

 North Carolina 4 



The limits of the senses 4 



page 

 51 



27 



n 1 



105 

 63 

 94 



63 

 19 



115 

 87 



153 

 86 

 76 

 69 

 54 

 15,23 



77 



99 



3 



38 

 47 

 69 

 82 

 83 

 85 

 86 

 88 

 39 



48 



57 

 63 



77 



9 



34 



142 



I 57 



II 31 



