vill CONTENTS. 
NUMBER XLIL 
Page 
Arr. L.—On some points in Mallet’s Theory of Vulcanicity ; 
Kuve 
LL—On the Age of the _Lignitie formations of the Rocky 
Mountains; by L. Lesquebeux, 32 5.0 °..5._ 2.2.15. 
LIL—On Helderberg Rocks in New Hampshire ; by C. H. 
Mi 
TOHOOOR, 50 Fo 6 cig ae ee ee ee CL 557 
LIUIL—On Wheelente a new Fossil os ney O. Lorw,--- 571 
LIV.—The “ eens Conglo merate ew River, West 
Virginia; by We. M. Fouvimn®.. 0.2155, 573 
LV.—On a ‘eldspar from Bamid $s in Nonny, by GrorGE 
WwW. a 
es on some of the Fossils figured in the recently- 
Saat Fifth volume of the Illinois State Geological 
. 
epo y F. B. Meek, 
LVI.—On the eee Composition of the wood of Acro- 
gens; by Georce W. Hawes 5 
SCIENTIFIC INTELLIGENCE. 
Chemistry and Physics.—Antimonous chloride as a Test for Cassium, GODEFFROY: 
oduction of Black Phosphorus, RitrEeR, 587.—Influence of the posi- 
le A 
—On the Vibration of Liqui rfaces, BARTHELEMY, 589.—E n of Gas 
PH. Ji efraction and Dispersion of Gases, Mascart, 591.—Refraction of 
compressed water, M of density of W. A 
Gaseous, Liquid and Solid States of Water- substance, J. THOM SON, 593. 
Geology and Natural naan Re ory phenomena in Nicaragua, THOMAS BELT, 
i e of the Alps, M. Cuarues Lory, 595.—Bulletin of 
i i 96.— 
inn a Bs Rs 
and §. F. PeckHaM: Skeleton ot a Whale i in the Quaternary of New abe 
by D. Honeyman: Note on Prof. Heer’s new work on the Fossil Flora o 
Arctic, by L. LesquerEux, 597.—Hozoon ag eg the Sais fossil ihe 
Archzan: Manuel de Minéralogie, par A S$ CLOIZEAUX, —Syste 
Mineralogy by James D. Dana: A Revision ot ‘ie No mh ke rican Chansops: 
iaceze, by SERENO WATSON, 599.—Sarracenia variolaris: Jo sen Hoopes, 600. 
—Tube-building Amphipoda, by S. I. SmirH: On a new Genus of ‘Asellidze, by 
i A. #8 
Astronomy.—N: ee ecg Inclinations of the orbits of periodic comets; Cordoba 
Observatory 
Miscellaneous ae Intelligence.—National Academy of Sciences, 603.—Ameri- 
con Association for the — nt - Science, 604.—The Constants of Nature 
Smithsonian Miscellaneous Contributions, by F. W. CuarKe: Fifth —_ al 
Report of the State thes i of Health, of Massachusetts, 605.—Report on the 
Condition of the Sea Fisheries on the South Coast of New England in 1871 and — 
1872, by SPENCER F. Barrp: Centennial se erponeag So 17 boar. 606. Asse 
ati Ge: c Lea he Geo 
vations on the Genus Unio, etc., by logy. 
Physical Geography of the Lowe zon On Ooen an "Cniie ts, by J 
CrotL: Annual Report of the Tru Museum of i abe Zoology 
College in Cambridge, renner with the Re eae f the per ra of 
the Museum for 1873, 607. Bulletin tin of the Minn Academy of Natural 
Sciences for 1874: Errata to papers in this volume by seagrass Ver 608.— 
Obituary.—Professor John Phillips: Johann Heinrich von Madler, 6 
ERRATA TO a Vi—Page 251, E from top, for admissible, read inad- 
Page 450, 1. 6 from top, for Touer, read Toner. rue 478, 1 10 from 
me Fo O19, te hia ee be Pe ek te. 
