PaGE. PAGE, 
Bia teas ee cia aee + fash 21-22: (Lexas, Caan os pied ¥ ic) viens 15-16 
Snake thiver, Idaho. ......<. 6. 4-5 COpper ‘Tegion®. ... 65:55") 15-20 
Sonometer, organ-pipe...... 163 Cy PSM seo meat re be 17 
SPOMUMENE 5. bin, « cylotbgns ZiO2 pumice-tuli 24. uteasa 1 52 
Springs, hot, at Pagosa, Col.. 7 | Thin sections of rocks. .49-53, 154 
soda, near Fort Worth, Thymole sulpho-acid ....... 3 
SU eRa'S a ee 15| Tides, high, erosion by......80-85 
Salt, in. Vexds cps. 16) Time-system, international. .86-95 
QUUIG.%. . . cnc eeneeeeeet ws tavern 17/5] CoOULMaline ee ae J2OF 
Stalactites in Mammoth Cave. 60! Trachyte............ 19, 23, 169 
Stan dardsioh time se ce els a «- « 88 | Transformation of peat...... 71-76 
Star-photographs .. is AG) | Mreniplyted. Ge oak. i octal 58 
Staten Island, N. Y., " geology dimassiestrata:<. -.).605 tone 20 
2) Peele oe nee ee 5O—50j| (Urilobite oi. Bekcicne spares apy ths zi 
Natural Science Associa- Tripoli interstratified with vol- 
SAO IAN cae ec eameR eet Ah 67 CANICTASHES .)c006% als dee 55 
Steam, behavior in steam en- Tubercular disease, prevention 
gimme cylinder. .. 4... III-I14 01 Ae eh oe ae a 181 
pipes, heating surface. .67~70| Tunnel between England and 
DUBLCOSEOME !. tj. 9, 15, 118-120 Eirancey.; pinaigats cae \155- 2 
Brewster’s theory of..... 9'| Turba-ef Brazil. : .).. veces aces 
Helmholtz’ views on. 13-14 Utah, sulphur-deposits... . 168- HE: 
MNOLESiy PE - Aepie es: 114-118 | Ventilating chimneys....... 67-70 
St. Eustatius, W. I. 23| Virginia, Southwest, mineral 
Stone implement from Waynes- FESOULCES Of ¢. 2 ‘aoa 
WUNES INA (Gage “yoann a oee $5 | Virgin is; Wt... breccias. ae 
perforated, from Europe... 49)| Voleanic ‘ash’. . .; 23, 49-56, nae 
Submarine tunnel between 171-172 
England and France.155-158 | Wagon Wheel Gap, Col...... 7 
Subsidence and elevation. ..22-24,| Weehawken tunnel, minerals 
2602020" 00;/ 100) ) Swe. serie aoe . 129-131 
Sugar, maple, sap-sand...... 167 | West India Islands, distribuc 
Sulphur deposits in Utah and tion of terrestrial mol- 
iINevadanere ne aOR 715 IUSCSici fines SRY oe 181 
Sun-photographs ........... 145 geology... o. Aen 21-24 
Taleischist. -...< ; ..56-58 | Whale captured off Montauk. 147 
Tellurium, in copper products Wichita Mountains, Texas. .19-20 
fromeGoliememine cris Sou: 4| Williamsbridge, N. Y., pot 
Temperature, Mammoth Cave 59 holeswe-S: Freres): 181-183 
Terrestrial molluscs in the Witchcraft -excitement,  ex- 
IW @Sb dbnciesi st 2 prc teiricy te. 181 planation Gb oa... + 150-153 
Tertiary strata....... ©..- 21-22| Yellow Day (Sept. 6, 1881), 
Testing iron and steel, commis- atmospheric phenomena _ I 
sion. fomtoan ot abcess 149 | Zero-meridian for standard 
safety of kerosene oil CUE ho). cots 4 gene 93-94 
5 Rjorea's gua haley teers 138-143 | Zonites, new species ot....... I8I 
