BD xX 
Page 
Acoustic phenomena of falling 
MIRO Ge ag ttt ik wets Og LT, = 14. 
RCO A ere, es eas poe kes 18 
PETEPIV BEG NGS iorve abide v Gals = Co ws 25 
RRP ASEES ere et oy eiete ee A eae 24 
BROTUILTONGRR a Nees ov dase ke 18 
BRERA RIOT cgiide S's «ce, cs 2 23 
RMR ICOS OCC Giese Sc. ie ok 5 18 
MUNAINSUS HAAG A Scere oR e SF oe 19 
HOS 48) Ln RRO a i ee e 18 
PPGLCTINUON vsivs ed says 2 To° 22 
PUROSIOSIOULES 25% voces vaeee ek as 18 
PeMNVRES Clk al ots The en 2 
BE AARID RR, As wild sons 6 Lane oe pp 
PICBOMI DUO a states eles ae wee 18 
Agates, Theory of formation of... 197 
Age of the “ Pillar of the Consti- 
LC Ne ee a oN Memes 254 
Allen, J.A., Rive Pee ais tocatat ste 200 
Almy, John D., Communications 
SPAN co ak DOM gee Dh RC ARO I 221 
Altitude of Ixtaccihuatl, various 
" determinations of .....02.. 107 
snow line on Popocatepetl... 92 
Popocatepetl, Various deter- 
GMOARONS OLT os. e eo ie tees 87 
Altitudes near the Ranch of Tla- 
TIER SS SPSS ae eae 2 Bieri go 
regen LR RT er St eee ae ve 
Amalfi, Mining District of i4t, 0137 
PEON fe eects a okies 137 
ete LOWN: Of 05s cde de oe 78, 308 
Ameca-Ameca, same as Ameca. 
PIMPRISEN ICO Se O42 vue aedcie Secs 24 
MEM ar APS NGIGS 5605 a u's es ion se ale 199 
Anaime, Mercury ores of........ 169 
Analysis of—dolomite........... 230 
Hopewell Mounds meteorite. 313 
Bete Se Od iiss 5 ee Shae Ale 223 
Long Island meteorite....... 207 
317 
Analysis of—-taenité........5...5. 
Toluca meteorite . 
Analyses of meteorites, ed 
10/23,-25; 310; 
PATCH GL LU er niente Suite oe 
Andesite, Amphibole, of Ixtacci- 
LUUSESUGE OS 9s 6g NaN Olt ace Sea a a 
Hypersthene, of Popocatepetl 
ANOPT, “EHstOryrOt ares ees cee be 
Mining District of....... 
Antioquia, Department of....... 
DistricVok Wests (reyes: o: 
Mining districts and ores of.. 
Anza, Mining District of.131, 141, 
Ya PONIES.) Coenen eee 240, 
Arsenopyrite, in needle form..... 
Ascent of—lIxtaccihuatl...... 
PODOCAteHEL mr, yor gi ee sles 
PN CLIT OSM et eis een sie oi « 
AGtrOcCeniayCOniCas se. oar vs 3} 
AMV LUM Ceosemptenmueataes $5 5G eed os 
EXCLADOSAUTtI same... akan tee g 
Baker, Frank C., quoted. .86, 105, 
Bats, Distribution of in caves.... 
Becker, Ge: bY quoted... i/.., Suen 
Bibliography—of Geology of Co- 
Page 
314 
. 308 
313 
185 
119 
100 
138 
138 
130 
I4I 
130 
142 
254 
147 
105 
82 
23 
215 
19 
281 
ILI 
181 
148 
200 
200 
RGU RGER ee a css > xk x oa ots 
of Popocatepetl and Ixtacci-. 
Ep Feak Sreeemeaenees 390 2 Sp 3S yells cru ne 
Bielaiss Gomet acces: . .osts ttt 29, 
DRC gie Oils Wl Geeta, Fo as Sita bes 
PATEACIC) ene WN ef d ae ca oases « 
idea (eyo ste oe Sea ae saws 
SEALE + gar SAS SI pe ae 
Blatchley, W. S., quoted.247, 240, 
253, 264, 
Bradbury, Dr. S. M.,. Correspon- 
PCIE Itlinges so s's.3s'ee seh eras 
Breccia from weathering of pyt- 
ULEELE DSS ae PODER UA RNG SOE RB 
