INDEX. 1X 
SARIN OC Ch cd Chee meme Poppe a eee eke the aS. cis «NER REE hate oamares ey eae es i oe AOA 21 
Shutt.Gsb- article by, 12 with tkenberry:.1vs2 seus winner: AUR Re hee 
Sound, experiments in judging the direction of....... Se MAM ele tand Miho a'e 9 
Sound, experiments in judging the distance of,............... Ae Hep ore ee I 
Spirifer <ameratus Morton, variations of external appearance and inter- 
VAG a RAC TERS o fk ei acc RN Ket) EAL eres Why ne Mee gee Me aLmeeieg a attr UR ett 103 
SpooveDleibrabky, heating. plamt Of 2 sae tbr eee tines a ag edema ora. 3 a Bea 149 
SU LENUIAIN DALES sepecet ire gk cate Sh Ng mdieat or eep an so mate NN ance tate ee ae alate ett a Ht OG 
BLGMEHS mV CO GRATLICLES® DY ite seu 0 (ich. Mop eee aie et Tnuaa ogee inital cme aia TT GlOF 
Semaine eAllbate* arti Cles «Dy 5 sian ae ee eee oe, whe OF eye tes: 5 PTOI ES yi Ly MLO 
a8 
live ce EMM Ea Tl ces seca agyt Pere lites Sosa a ST cece asa Rel Sor age tal aaet et obicgs eRe AIS oy om Pie Iaa kaha mena Ee 206 
Bie ONE ONT Lane dk Se ened Cheat ose age er aes Ruy Le Emm CCS ek ete che Ga en Begs cy hea 207, 209 
FE HOW OHS a Sige WE ee Marae AT AY Sol ean th alt cy tayet Age ORG ek tO as RL ty 209, 210 
{eas ere NY eS ePENEA Ne tect Ned ee AcUaN STR Star te i Mara aM EnM Se Peat yl APE 209 
imecita sali bak ree earns oiecee eet ce tana bat eG MANU Bac ahi 209, 210 
Ghsoletasii alll scr Ave ae ees ee Operate Tees SPIN eA Pies sr nas 209, 210 
“Uren atsteyatgie nt O14 Boel Da tale cancel eres cot ey a a: SPSS EP ALAR ORY sen st LMT a 207 
BMoxocDelysplatiheMlis on na ein meno ete eet eA ale lieniad 4 we Ueraee IN Sele 201 
ihipileswemains roma the Wt. Prernes mile we iwlahi ee lsc dees ithe, eaetiehes ovale: 201 
le! 
WniversalwOuawinewGurve, 172; sizes of Plate XL, pea, eS. chee ee 172 
WwW 
Wiel emlcm Gn coree sal tiCleab yrs. naahy sex sera ete cm meal acum eee rae hc tenet wae malelh ecam 201 
Wiranaint Eircttt ght aucchr tlle ib vist. Smee cea cree Sein cae hs Suey Ings so chee emt, ora haan 149 
Wheat Starch as an adulterant of buckwheat flour. /..52...02.2...09 0... .4.%. 38 
Wiheatstone’s Bridge alternating ‘currents In). 254 ta\).. J eh ee ee 31 
NAMA Poy me tS has A Ne an BOs Ce ere RRA aE EO A a arte i ican Rp IE Mam eMC 206, 207 
Abe LES: Daye ss yeiecs rec e e egc oe eel e ST A Beale aie ae LEAR Ty Ns gah 173 
HOLES Dyer doon). Coy: Sea hanes) Sa ME DRE Red aie aes a acre NOS ESRNE IS ANS A er 235 
x 
eTrobateae MiG atay SKN sof seme y eee aaa sak ich, initiate de Pea yos Garantie (once Be a LAS 
Xiphactinus Leidy, individual variations in the genus.......... ........... 115 
SUD NALS SESS AUG Ea a lS ek tea UNG Spr a ae a bel Ra rat Na EA No a 119 
MIMO SST Greet eace e eh eC an MMe AS WTA BLE ont ict ty ela RMN AAG 115 
SLTEUUIIR ASH antes sahck Nonny Ay Uv srea Mes eet Ld MUN ANS Oa ec NCR ene 1 NUE I15 
Z 
Zoolorical Eabovatoryscontributions tromyaNon sited. ss pee ek oy, oy hae 197 
Zoospores of Algz, apparatus for the study of 
