INDEX. 
567 
Page 
Stanton, T. W., elected member. 523 
Stevens, John, and his sons. J. E. Wat¬ 
kins......... 510 
Straight-edges, The manufacture of very 
accurate. F. L. O. Wadsworth. 525 
Sun spots, Auroras and. H. A. Hazen. 538 
Telescopes, achromatic, The oblique aber¬ 
ration of. W. Harkness... 524 
Temperature control of the geographic dis¬ 
tribution of plants and animals. C. H. 
Merriam. 537 
— inversions in the solar magnetic period. 
F. H. Bigelow.... 537 
Tennessee, Geology of Chilhowee mountain 
in. A. Keith. 71, 510 
Texas, Geologic evolution of the topog¬ 
raphy of. R. T. Hill... 508 
— Some peculiarities of rainfall in. A. W. 
Greely. 53, 505 
Timber physics. B E. Fernow . 510 
Tittmann, O. H.: Obituary notice of J. E. 
Hilgard. 462, 511 
Toner, J. M.: Obituary notice of C. H. 
Nichols. 511 
Tornado, The mechanism of a. H. A. Hazen. 525 
Treasurer’s accounts for 1892, Report of au¬ 
diting committee on. 519 
-1893, Report of auditing committee 
on. 531 
— report for 1892 . 515 
-1893. 528 
- 1894 542 
Triangulation, The direct synthetical 
method of adjusting a. C. H. Kum- 
mell. 535 
Turner, H. W.: The lavas of Mount Ingalls.. 512 
Van Everen, H. G., elected member. 524 
Page 
Variations of the barometer, Diurnal. A. S. 
Christie. 67, 506 
Volcano, A study of a dissected. J. P. Id- 
dings. 507 
Wadsworth, F. L. O., elected member. 521 
— Fixed spectroscopic trains. 533 
— Manufacture of very accurate straight¬ 
edges. 525 
— Method of determination of a meter in 
terms of a wave length of light. 520 
Walcott, C. D.: Notes on the Lower Paleo¬ 
zoic rocks between the Susquehanna 
and Potomac rivers. 511 
Ward, L. F.: The new psychology and what 
it promises. 506 
Washington monument, The pyramidion of 
the. B. R. Green. 522 
Watkins, J. E.: John Stevens and his sons... 510 
Wead, C. K., elected member... 532 
— A possible explanation of the periodic in¬ 
version of Bigelow’s curve. 538 
Welker, P. A.: Electrical phenomena on 
Mount Elbert, Colorado. 539 
Welling, J. C., Death of... 538 
— Obituary notice of, by J. H. Gore. 486 
White, (J. A.: Cruise of the “Clover;” Re¬ 
sults—echoes of fog signals. 526 
Willis, Bailey; Illustrations of Appalachian 
structure. 507 
Wirth, Albrecht: Some modern African 
problems. 536 
Woodward, R. S.: General problem of least 
squares and a solution of one of the 
higher special cases. 545 
— Rectification of a sinuous curve. 546 
— Use of long steel tapes for measuring 
base lines. 520 
