iv CONTENPS, 
Miscellaneous Scientific Intelligence.—Cause of the blue and violet chatoyant colors 
of Fishes, PoucHET : Tron in the blood, BoussiIngauLt, 78.—Prismatie bows 
A th - 
T. Rey n Journal of se Go Wot : Notes 
ag ag i Ferns en 1869, ete, A. PERREY: Half. io Boceeatione | in 
Scien 
NUMBER XX. 
Arr. XIII.—On the Evaporative Efficiency of Steam Boilers ; 
by Wm. P. Tro 
: 81 
XIV. Description of two new Land Snails from the Coal- 
measures; by F, H. BrapLey 87 
XV.—On Glacial a in the vicinity of New York 
ity; by SRE ENE, ok PULL eu Le ee 88 
XVL—On the Hetimation “of wa in Coal and Organic 
mimpounas: by WwW. G. Mirsrie, 022i i. sues 8.88 90 
ae —On the Address ee the American Association of 
rof, T. Sterry Hunt; by James D. Dana. No. II,- 97 
XVII —Reply toa “ Note on a saneics of Priority ; ? by 
WAM PEATE SS es ree. 105 
XIX.—-On the Corundum region of North Carolina and 
Georgia, with descriptions of two gigantic erystals of 
that species; by Cuartes U. Suerarp, Sr.,_- ---- -- 109 
XX.—Ohm’s law counidened from a geometrical point of 
Views by Jonn. Trownnipes, 0 0s 20 115 
XXI.—New N Gath American Myriopods ; by O. Harcer,_- 117 
Te Description of New Tertiary Mammals ; 
<7, 2), SAAR. POO bie cee a ans 122 
SCIENTIFIC ghee 
oct and Physics. —— experiment in refere the question as to vapor- 
es, T. PLATEAU, —On the nitr ato- ocala mores of the fatty series, 131.— 
eng Sa ction of prance acid by iodhydric acid: On an aldehyd-alcohol, 132. 
Geology and Mineralogy.—Fossils probably of the Chazy era in the Eolian Lime- 
stone of West Rutland, Bi.Lines: Hayden Exploring Expedition, BRADLEY, 133. 
—La Névé de Fst ve ses Glickers , DE SEvE, 134.-—The Ancient Glacier of 
the Rhone: Glaci in Fuegia ‘and Patagonia, AGASssiz, 135.—Annual 
rt of the Seporbrtamdent of the Louisiana State Uni —— for the oc 
1871, 136.—Investigations on Fossil Birds, Mitxe-EDWAnDs, 1 sp Ver. 
tebrates from the Niobrara ‘and U pper Missouri: Extinct Simrsais = 
Tertiary of Wyominy, Lempy: Graptolites, 142, Pek sap: of New e des 
of Fossils, HALL and WHITRIELD : Coal of Lota: On the Rate of Growth of Coral 
Reefs, Dawa, 143.—Re r = années 1868 and 1869, Dr B 
ni Jordan 
tion of the vapors near Vesuvius, GORCEIX Mots on Rhinosaurus, Marsu, 14 
Botany ~ Note on Intelligence i in Monkeys, Corr, 147.--Curious Habit 
: Dia 
of a Snake, Cop toms in Hot Springs, 148.——Life in the Mam 
PacKarD, Jr. and AM: Reproduction of ges Robert Brown’s first 
Botanical Paper, 149.—Prantl’s memoir e, ~~ 
the United States: Kan-sun: Martius, Flora ieasiloaia 
