{W. H. Havens; Alan S. Hawksworth; E. R. Hedrick; Paul Helbronner; Rollin D. Hemans; St. Hempel; Abel Heywood and Son; "Herschel Portrait" [A. O. Leuschner; Louis J. Carmel]; Elsie Isabel Hill; F. W. Hinrichs, Jr.; Shiu Hirayama; E. Hirsch}
{Concerns Bi-centenary of Newton's death, celebrated at Columbia University on Nov. 1927. Corresp: Frederick E. Brasch; A. O. Leuschner; E. W. Brown; W. W. Campbell}
{F. G. Hagemann; H. M. Hall; J. Halm; Hamburg Seewarte; Richard Hamer; W. J. Hanna; E. Hartwig; Georg Hartwig; Harvard College Observatory; Herbert Harvey; Margaret Harwood; W. Hassenstein}
{Sigma Xi; L. Silberstein; Edward E. Simonds; Frederick Simpich; Arthur W. Sinclair; A. de Sitter; W. T. Skilling; Sarah Louise Slaughenhaup; Paul Slavenas; Frederick Slocum; E. E. Slosson}
{Joseph A. Hodam; C. Hoffmeister; Helen Sawyer Hogg; Melvin J. Hoirch; Hong Kong Royal Observatory; Inga Howard; Herbert A. Howe; J. Huizinga; Beatrice M. Humason; W. J. Hussey; Robert Maynard Hutchins}
{Science Press; Science Progress; Scientia; Scientific American; Scientific International Research Service Corp.; E. M. Scofield; Charles Scribner's Sons; N. P. Scudder; H. von Seeliger; Seismological Society of America; Selznick International Pictures, Inc. [W. E. McCune]; Service; Geneva Seybold; James A. Shanahan; W. N. Shaw; Barbara Sheffield}
