produced by a ies current, 426. —Electrie ciciimaant ity paper, by Rev. ae 
‘H. G. O. Dwicur, 427.—On New Process for obtaining pure 
by Profs. R. E. Rogers, and 'W . B. Rocers, 428.—Radiant Heat: “Milk of the = 
Milk tree: Artificial Asbestus, 429.—Artificial Aventurine, by MM, Fremy and ae 
CLEMANDAT: 
Silver in ancient coins, : 
Mineralogy and Geology.—On certain Pseudomorphous Crystals of Quartz, by 
R. W. Fox, 430.—Petrified Forest se! Cairo, 433.—Cuchullin Hills in Skye: 
Gradual rise of Newfoundland above the sea: Ciaces aract Cave, Schoharie, 434.— 
Geological Survey of Vermont: ice 435.—Pterodactyl. in pe Begin 
k, 436. 
Zoology.—On the Yormution. of Cells, by M. ‘Coste, 436.—Spondylosaurus, by : 
M. Fiscuer DE Watpnrnm 4 Fharecaceras; 4. _ new genus of the family of Or- 
thoceratites, by M. 
passes ‘species of Fossil Asters in the Blue Limestone of 
— — les Smear J. G. Anruony, and W. P.J 44) — 
invbricasue’ Siliceous shields of Infusoria from 
ee ‘ jhe “ 
a ge. ee ee aac Rn sg ee pe ee 
ae Find Cones of my 448. —_Comet of 1844-45 : hse a Saar, 449, 
Miscellaneous Intelligence.—Anastatic Printing: E 
death and disappearance of some trees 
of Neufchatel, Switzerland, 451 -Lake Torrens, South Australia : 
Guano : re Collection of Fossils of Herr Munster of Bayreuth : Height of 
Vesuvius: 
_ chison ad icndsn, 2 
tural History Ce many York: ee . 
n oci Y, oF Malis. American Acad- 
oe vitae ayer Scleneta on sun. ue Universelle, Geneva, 453.— 
Phycologia Britannica; or History of the British Sea-weeds: Hooker's Species 
Filicum, ete. + ‘Hassate, oe the British Fresh Water Alge, including 
argo. mace® : ‘Martivs, Palmarum Genera et 
descriptions of ia! 
Species: aa ad : Borssizn, wae oe dans le Midi 
de Espagne, iecpes of Mexico, 456. 
Recent ae 455. és 
Specular Iron nen produced: Bromide and Chios. of Pi 
449.—On oe = 
*s and shrubs, ‘450. eae Louis Nan ie 
talian Congress of Science : eee conferred on cosas ces =o ae 
