LIST OF PUBLICATIONS. 



XI 



U. S. Department of Agriculture — Con. 



Farmers' Bui. G98, Trenching Ma- Page, 

 chinery Used for the Construc- 

 tion of Trenches for Tile Drains, 



D. L. Yarnell 583 



Bureau of Crop Estimates: 



Mo. Crop Rpt., vol. 1, No. 8, 



Dec. 30, 1915 595 



Bureau of Plant ludustrj^: 



Inventory of Seeds and Plants 

 Imported, Jul> 1 to Septem- 



80,1913 527 



Bureau of Soils: 



Field Operations, 1913 — 



Soil Survey of Scotts Bluff 

 County, Nebraska, L. T. 

 Skinner and M. W. 



Beck 511 



Field Operations, 1914 — 



Soil Survey of Tattnall 

 County, Georgia, A. E. 



Taylor etal 510 



Soil Siir^-ey of Clinton 

 County, Indiana, W. E. 

 Tharp, R. H. Peacock, 



and C. M. Rose 510 



Soil Survey of Clarke 

 County, Mississippi, A. 

 L. Goodman and E. M. 



Jones 511 



Soil Survey of Grundy 

 County, Missouri, A. T. 

 Sweet and W. I. Wat- 

 kins 511 



Weather Biireau: 



Circ. L, Instrixment Div., In- 

 structions for the Installa- 

 tion and Operation of Class 

 "A" Evaporation Stations, 



B.C. Kadel 509 



Instructions to Special River 

 and Rainfall Observers, A. 



J. Heniy 509 



Scientific Contributions :« 



The Resins in Hops from Va- 

 rious Geographic Localities, 



G.A.Russell 502 



Isoprene from ^-pinene, A. W. 



Schorger and R. Sayre 502 



Researches on Organic Per- 



iodids, I, W. O. Emery 502 



Reaction of Soil and Measure- 

 ments of Hydrogen Ion Con- 

 centration, L. J. Gillespie.. 504 

 Calculation of Total Salt Con- 

 tent and Specific Gravity in 

 Marine Waters, R. H. True. . 504 

 The Da\'i3 Spot Test in the 

 Preliminary Examination of 



Creosotes, H. Cloukey 508 



Yield of By-products from De- 

 structive Distillation of Con- 

 ifers, H. K. Benson and 

 M. Darrin 509 



U. S. DepartTuent of Agriculture — Con. 



Scientific Contributions — Contd. Page. 



Discoloration of Maple in the 



Kiln, R. C. Judd 509 



The Dollar and Cents Value of 

 California Meteorology, F. A. 

 Carpenter 509 



The Physician and the 

 Weather Bureau, F. A. Car- 

 penter 509 



The Final Hydrogen Ion Con- 

 centrations of Cultures of 

 Bacillus coll, W. M. Clark ... 524 



Bright V. Russet Fruit, W. W. 



Yothers 535 



The Importance of Phonologi- 

 cal Observations, G. N. 

 Lamb 536 



What Chemistry Has Done to 

 Aid the Utilization of Wood, 

 S. F. Acree 538 



Need of a Pm-e Culture Supply 

 Laboratory for Phytopathol- 

 ogy in America, C. L. Shear. 539 



The Chestnut Bark Disease on 

 Freshly Fallen Nuts, J. F. 

 ColUns _.. 546 



Razoumofskya tsugensis in 

 Alaska, J. R. Weir 546 



TeUal Stage of Gymnosporan- 

 giura tubulalum on Junipe- 

 rus scopulorum, J. R. Weir. . 546 



Hoplothrips corticis: A Pi'oblem 

 in Nomenclature, J. D. 

 Hood. 550 



A Note in Regard to Trichodec- 



tes hermsi, M. C. Hall 552 



Some Modifications of the Hy- 

 popharynx in Lepidopterous 

 Lar\-aB, J. J. DeGryse 553 



Notes on the Species of Culex 

 of the Bahamas, H. G. Dyar 

 andF. Knab 553 



New Ceratopogoninse from 

 Peru, F. ICnab 553 



New Ceratopogoninae from 

 Peru, F. Knab 553 



Two New Species of Simuliuni 

 from Tropical America, A. H. 

 Jennings 554 



Eastern Symphoromyia At- 

 tacking Man, R. C. Shannon. 554 



A New Eastern Brachyopa, 



R. C. Shannon 554 



A New Species of Cephenom- 

 yia from the United States, 

 W.D. Hunter 554 



The Tachinid Fly Mauromyia 

 pulla and Its Sexual Dimor- 

 phism, W. R. Walton 554 



Wool Maggots of Sheep in the 

 United States, F. C. Bishopp 

 andE. W. Laake 554 



a Printed in scientifle and technical publications outside the Department. 



