{Alice H. Farnsworth; Max Farrand; V. L. Fasschel; Anna Mary Felker; Ann Walker [Mrs. James B.] Field; P. H. Field; Howard Finley; John Forsyth; W. E. Forsythe}
{Felix M. Perez [Sanchez]; T. P. Perkins; Nicolas Perrakis; C. D. Perrine; Max Petersen; John E. Pfeiffer; Philadelphia Inquirer [John Miller]; "Pinacyanol" [advert from Lucius & Brüning Farbwerke]; Harry Hemley Plaskett; Poggendorff's Biographisch-Literarisches Handwörterbuch; Popular Astronomy; Popular Science Monthly [Sumner Blossom]; M. A. Porcabeuf; J. G. Porter; Potsdam Astrophysical Observatory [H. von Klüber; E. F. Trondlich]; Poulkovo Observatory; N. R. Powley; Poznan Observatory [Joseph Witkowski]; Irwin G. Priest; Henry S. [& Mrs.] Pritchett; S. Procopin; W. S. Prosser; Herbert Putnam; G. P. Putnam's Sons; W. F. Quarrie & Co. [S. E. Farquhar]}
{Edna Wadsworth; Heint Walentowsky; Gilbert T. Walker [folded]; O. R. Walkey; War Department [T. L. Coles; F. W. Coe]; J. G. Ward; Warner & Swasey Co.; Wasco County Library [Nina M. Moran]; Washburn College [Helen Whitaker]; Washburn Observatory [George C. Comstock]; Washington Academy of Sciences [Robert B. Sosman]; Washington, State College of [W. W. Foote]}
{includes notes on "Distribution of Stars in Quadrants," "Microscopes for New Measuring Machines," "Elliptical Polarization of Tower Mirrors," "Orientation of General Magnetic Field Plates," "Photographic Effects in Fath's Observations," & "Precision of Calcium Flocculi Measures"}
{C. Addison Willis; H. C. Willis; Carl Wilson; Herbert C. Wilson; H. W. Wilson Co.; Latimer J. Wilson; Olin C. Wilson; Ralph E. Wilson; Clyde Wolfe; Coral Wolfe; Harry O. Wood; R. W. Wood; R. v. d. R. Woolley; J. H. Worthington}
{John L. Ridgway; A. E. Riemer; T. K. Riggen; Philip S. Riggs; Augusto Righi; William E. Ritter; G. B. Rizzo; W. F. Roberts Co., Inc. [B. H. Roberts. folded]; H. P. Robertson}
