IV CONTENTS. 
The mechanism of ‘clicks’? and ‘“clucks,’”’? A. G. Bell, ( Title 
Only) sh aas seen see Soe ees ee ee en oe 
The crumpling of the earth’s crust, W. B. Taylor- .---.-- = 
The columnar structure in the diabase of Orange mountain, 
INiiSy ab, Dd dines ee 
The terraces of the Potomac valley, W J McGee, ( Title only)-_ 
Anthropometric and reaction-time apparatus, J. S. Billings 
and W. Matthews 222 .-2 7 tools vel s (eee eee 
The condensing hygrometer and sling psychrometer, H. A. 
1 £1 “Wea en Soareaie yD MGA RRND MI MORALS Rep BO SET 
A new volt-meter, Cy Mendenhall2{--5 a2 
Flextures of transit instruments, W. Harkness___--_-____- = 
An attempt at a theory of odor, F. W. Clarke --____ -___ -_-- 
The Flood Rock explosion, F. W. Clarke, C. F. Marvin, and 
BM, Paul oo oe es en ee 
The systematic care of pamphlets, G. B. Goode and C. V. Riley 
Germ cultures; J. S. Billings! 22. 22-222 eee 
Presentation of, the annual’address=_2-- 2 == eee 
Annual meeting ’.o- ioe s tee ee ee eee 
Bulletin of the Mathematical Section ~—_- ----__.._- -__- - 2S ee 
Standing Rules of the’ Section — .----. --—__ =22 0s eae 
Officers of the Section... 2-7. oa2- 5 ce Loses eee 
Example illustrating the use of a certain symbol in the calcu- 
lus of affected quantity, E. B. Elliott, (Title only)_-------- 
A collection of formule for the area of a plane triangle, M. 
Baker,)( Title only) 2 22. cone ctn ce oa oe cee or 
Physical observations on Wolf’s comet (1884, III), W. C. 
Winlocko W235 2225 2e et ee 
A slight modification of the Newtonian formula of gravitation, 
WeoBe Daylor = 2 eo eres Socsesss ssl. ae 
An artifice sometimes useful for the adjustment of conditioned 
observations, ‘C.°H. Kummell 222 2 
The theory of Mercury, G. L. Raven6_-_~-_ --_.-. ---- --== as 
A group of circles related to Feuerbach’s circle, M. Baker_-_- 
Distances on any spheroid, C. H. Kummell ---.-_-.-----_--- 
On Grassman’s system of geometry, A. Ziwet_---- ----__ -_-- 
Cause and chance in the concurrence of phenomena, M. H. 
Doolittle, (Wide only) =..--U2 222 22 .cos 22 
The asteroids, G. L. Ravené, (Title only) ».------. -----2 ==. 
Secular perturbations of Polyhymnia by Jupiter, W. F. McK. 
GG? ‘oo oe ao ee eaten sees ee eae eee 
Some practical features of a field time determination with a 
meridian transit, KK. S. Woodward 2) -2_2 2 eee = 
Can the attraction of a finite mass be infinite? C.H. Kum- 
Me] lov 2. ise ew See ao oa eo eee ee eee 
Committees on mathematical communications. -_.-__ --_. -_-- 
Under 2a as a re 
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