1917] CONTENTS. XXIH 



Page. 

 Qiiaintance, A. L., and Baker, A. C, White Flies of the Subfamily Aleyrodinae 



(Aleyrodidse) 755 



Rabak, F., The Effect of Curing on the Aromatic Constituents of Vanilla Beans. 416 

 Ransom, B. H., Occurrence in United States of Certain Nematodes of Rumi- 

 nants r 577 



Reed, E. O., A Method for Determining the Strength of Paper when Wei 509 



Robertson, F. E., and Gilbert, C. W., A Study of 108 Milking Machines in 



Jefferson County, N. Y 774 



Rockwood, L. P., Sporotrichum globuli/erum, a Natural Enemy of the Alfalfa 



Weevil 58 



Rohwer, S. A. , A New Bee of the Genus Dianthidium 258 



Rohwer, S. A., Notes on the Psammocharidae, with a New Species 551 



Ross, W. H., et al., The Use of the Cottrell Precipitator in Treating Phosphate 



Rock 805 



Russell, G. A. , Volatile Oil of Euthamia caroliniana 206 



Safford, W. E., Desmopsis, a New Genus of Annonaceae 433 



Safford, W. E., Identity of Cohoba, the Narcotic Snuff of Ancient Haiti 734 



Safford, W. E., Proposed Clasaincation of the Genus Rollinia, with Descrip- 

 tions of Several New Species 433 



Safford, W. E., RolUniopsis, a New Genus of Annonaceae from Brazil 220 



Salant, W., and Bengis, R., Physiological and Pharmacological Studies on 



Coal Tar Colors, 1 262 



Salant, W., and Li^^ng8ton, A. E., Experiments with Oil of Chenopodium and 



Cardiac Stimulants 576 



Salant, W., and Wise, L. E., The Action of Sodium Citrate and Its Decomposi- 

 tion in the Body 467 



Scales, F. M. , A Method for the Determination of Nitric Nitrogen 504 



Schoenmann, L. R., and Taylor, A. E., et al., Reconnoissance Soil Survey of 



Northeastern Wisconsin 723 



Schorger, A. W., Chemistry as an .Vid in the Identification of Species 144 



Schroeder, E. C, and Cotton, W. E., Practically Significant Facts about Abor- 

 tion Disease 883 



Schroeder, E. C, and Cotton, W. E., Some Facts about Abortion Disease 881 



Schroeder, J. , The SolubiUty of Leucite in Sulphurous Acid 414 



Schroeder, J. P. , The Availability of Nitrogen in Garbage Tankage 325 



Scott, L. B. , Varietal Standardization 537 



Shamel, A. D., Bud Variation in Lemons 537 



Shamel, A. D., Citrus Observations in Brazil 241 



Shamel, A. D., Some Recent Operations and Experiments with Bud Variations. 141 

 Shamel, A. D., The Relation of Humidity to the Ripening and Storage of 



Fruits 741 



Shannon, R. C, Notes on Some Genera of S>Tphidae with Descriptions of New 



Species 255 



Shannon, R. C, Two New North American Diptera 553 



Shaw, H. B., Self, Close, and Cross Fertilization of Beets 522 



Shear, C. L., Grape Anthracnose in America 545 



Siegler, E. H., A Codling Moth Trap 858 



Skinner, J. J., The Effect of Vanilhn and Salicylic Aldehyde in Culture 



Solution 731 



Skinner, J. J., and Beattie, J. H., Action of Carbon Black and Similar Mate- 

 rials in Soils 214 



Skinner, J. J., and Noll, C. F., Field Tests of Fertilizer Action on Soil Alde- 

 hydes 424 



