68 PHILOSOPHICAL SOCIETY OF WASHINGTON. 
Page. 
Taylor, W. B.: remarks on the topophone.... 13 
Terraces of the Potomac valley (Title only). 24 
THEO Of MerCury.c.csccssseccnsccoscsess Seeeuaineteress 41 
Thompson, Gilbert, on rock paintings in 
INGW, WIOKIC Oss cccnccascsacanssusasescreece eudvaesvespen wLO 
Thunderstorms of 1884............«+ senanedweusnuceavee 10 
-Time determination with meridian transit.. 55 
Toner, J. M.: remarks on the care of pamph- 
POGS sictavectteracs's Saananceuncenevat cnt evsncadvanksbapentees 29 
Topaz from Stoneham, Maine 5 
SROVOPNONO ivessevcncecencveccdenccres Seceeece este dacececcim dt) 
Transit instruments, Flexures Of..........0.000+ 27 
Trap, Colummnat........ccre donsrsedcabuanecanerearararseasitee 
Treasurer, Report Of.,.......scssee Snesnuanee xxviii, 31 
Twelve-points Circle........c.ccccescceserccsceree sees 46 
Two remarkable forms of mollusks............. 5 
Variations of latitude....rccsccscccssscsscccscenccscess 10 
Velocity of transmission of earth tremors... 28 
Verifying weather predictions..........cccsseeees 8 
Vital statistics of the tenth U.S. census 
(Dita iOnlly)icecessascacssmecesses sesceess 4 
Volt-meter, Exhibition Of...........sscsssseescesees Sco) 
Ward, L. F.: communication on the flora of 
the Laramie group..........ss00+ Sree deotensy LG 
Weather predictions, Verification of.......... 8 
Page, 
Weed, W. H., Electiontjo membership of..... 17 
Willis, Bailey, Election to membership of... 8 
Wilson, H. M., Election to membership of... 11 
Winlock, W. C.: communication on comets 
Thand TIT, TS84. ..0).cccsssqsesqeconcnensuccenieenian 16 
— — — physical observations on Wolf's 
comet (1884, III)......ccs0ocscssssesseeve iueonn conve » af 
— report of auditing committee.................. ii shee 
Woodward, R. S.: cited on infinite attrac- 
LLOV dsp osccutscctuete paneWoashadhouhvedeencsmiaumei 0000009, 62 
— communication on some practical fea- 
tures of a field time determination with 
a meridian transit.......... apeucpetenie sactunbament 55 
— remarks on geometric systems....... ceccesvee OS 
— — — infinite attraction of a finite mass.... 63 
— — — variations of latitude.............seceeeeee «i woe 
Wolf's comet........cscccsses bisesustessteaees au snunrven fades 37 
Wortman, J. S., Election to membership of.. 31 
Wright, G. M., Election to membership of... 10 
Yarrow, H. C.: Report of auditing com- 
HEULULOC ss vecsevensevsatntsvanncuentemaects 
Ziwet, Alexander: communication on Grass- 
mann’s system of geometry........ 
— Election to membership of 
