52 TABLE OF CONTENTS. 



VOI.UMK FIVK — PART FIRST (1888). 



North Carolina Desmids, W. L. Poteat 1 



On the Broniination of Heptane, P. P. Venable 5 



Some New Salts of Camphoric Acid, G. vV. Edwards 8 



New Halog-en Compounds of Lead, F. P. Venable and B. Thorp 10 

 On the Chord Common to a Parabola and the Circle of Curva- 

 ture at any Point, R. H. Graves 14 



The Focal Chord of a Parabola, R. H. Graves 15 



List of N. C. Fishes, with Description of a New Species, V. S. 



Bryant 16 



List of Butterflies collected at Chapel Hill, A. Braswell 10 



Aquatic Respiration in a Musk Rat, W. L. Spoon 21 



Chang-es in Bottled Samples of Acid Phosphate, W, B. Phillips 22 

 New Instances of Protective Resemblance in Spiders, G. F. 



Atkinson 28 



Note on the Tube-inhabiting- Spider. G. F. Atkinson 30 



Temperature and Rainfall in North Carolina, J. A. Holmes. . 31 



Reports of Officers 42-50 



VOLUME FIVE — PART SECOND. 



Erection of the Monument to Flisha Mitchell, W. B. Phillips. . 55 



Soaring of the Turkey Vulture, G. F. Atkinson 59 



Of the Three Crystallographic Axes, W. B. Phillips 66 



Chlorination of Auriferous Sulphides, E. A. Thies" • • • 68 



A Method of Finding the Evolute of the Four-cusped Hj'po-cy- 



cloid, R. H. Graves 72 



Mica Mining in North Carolina, W. B. Phillips 73 



Recalculations of the Atomic Weights, F. P. Venable 98 



Chang-e in Superphosphates when Applied to the Soil, H. B. 



Battle Ill 



Partial Chemical Examination of Some Species of Ilex, F. P. 



Venable 128 



VOLUME SIX— PART FIRST (1889), 



Historical Notes of N. C. Geological Survey, J. A. Holmes. ... 5 



Turpentine and Rosin, W. B. Phillips 19 



The Creosoting of wood with Creosote Oil, I. H. Manning. ... 27 



Botany as a Disciplinary Stud}^ Gerald McCarthy 33 



VOLUME SIX — PART-SECOND (1889) 



Addendum to the Minerals and Mineral Localities of North 



Caiolina, W. E. Hidden 45 



Nematode Root Galls, G. F. Atkinson 81 



A Tube Building Spider, W. L. Poteat 134 



