CONTENTS OF VOLUME XXIX. 
NUMBER CLXIX. 
Page 
ArT. git ag and Sedimentation of Clays; by Wm. 1 
Il. —Method OF illustrating formation of Diffraction 
ades. by ST. Moeeiawp.: 90 cue ae 5 
III. Spe of Rock notation for Geological Diagrams; by 
AMES ANA 7 
AY — Crystalline Rocks of the Scottish “Highlands; by 
D’- GRIRI iy: oo. sw Gein Coes) Beck ante aa 10 
6 
ARC 
V Grcet Vaaie Schodack Landing, N. Y.; by 8S. W. Forp, 1 
2 
BA 
VI.—Cause of Mild Polar Climates ; ; by James Cro i ees 
Vit The geet and Rate of Chemical rosin in the Lime- 
stone of Center Co., Pa.; by A. L. Ewrne,.-.------ 
Ag 
VIII.—Chrysotile roi Shi ipton, Canada; by i. G SmMiTh,.. 3 
D 3 
IX.—Santa Catharina Meteorite ; me 0. ge vaste lag ap 
.S Eee of Southern Delaware ; by F. D. Cuestrer, -.. 36 
XI.—Report of Sas eee of U. S. Coast Sariey. 1883, 44 
lodide 
XII. —Combinations of Silver Chloride, Bromide and 
with Coloring Matter rs; by M. Carny Lea 53 
XITI.—Present state of our knowledge of Refraction Equive 
lents ; H. Guaps nee En 
XIV. —Decay of Quartzyte, Peswo-bredots: by J.D. Dana, 57 
SCIENTIFIC INTELLIGENCE. 
Chemistry and Physi AG ected s ites Me ScHuMANN: Distribution . elee- 
trie lighting over great distance .—Heat and Electricity: Thermo-e itt 
tion ms, 6 Seek: Textbook os 2 dpa W. A. ANTH 
AL ; i 
ad Mineralogy.—Geology of the Scotti ao Highlands, 62. Te of the 
ancient “drift mats ane of ora land, A. FaAvRE, 65.—Geological Sections 
N. Hampshire and Vermont, C. H. Hircucocx: Till. feet ~ New 
crossi 
Harso. 66.—Copper-bearing rocks a the Lake Superior conti 67.— 
INC 
Geological 
Geological aerer 
a, N 
of Ohio, E. Orton, 68 ntributions to the T Gedlogy the U. 8., A. 
RIN: Report PPP of Geological Survey of Pennsylvania, C. E. BEECHER: 
Structure of the ee 5 GF. DE: Paleozoic Cor: pitzbergen, 
69.—Geology of Delaware, F. D. CuestTEerR ates of Pennsylvania, P. 
F Paleozoic Arachnida: E. D. Cope on Fossil —_ b Brazilian 
0. , 71.—Minerals 
ving oeganis ms at oye aides, M. EK. D UDERICH, 13.-An impreg- 
sited uterus of Echidna hystrix, R. Owen, v4 ier ho ge a Pal 
ER, 75.— 
pool in ekskvivanie BE. ste chat Food 0 
. G. BINNEY: Mediterranes: : Tho 
usks, Prod 
Siluroid fish, R. R. Wriaut, ete.: Deneck of of Renilla, EB, B. — 16. 
. 
uk; 
