CONTENTS. v 
XIV. On a Zeolitic mineral (allied to Stilbite) from the Isle er 
Skye, Scotland; by J. W. Matter, Ph.D., - - : 
XV. On the Application of the Mechanical est of Heat to 
the Steam Engine; by R. Crausivus, ee 180 
XVI. Statistics of the Flora of the Northern United States; by 
Asa Gray, - a 
XVII. Letter on the it ai of Practical Geology of “Gi 
Britain ; by Sir Ropericx I. Murcuison, 
XVIII. Remarks on the Genus Tetradium, with shoot ct fe 
Species found in Middle igen by Prof. J. M. Sar- 
ForD, A.M., - - “ - : - 236 
| XIX. A new Fossil Shell in = eae 68 River Sandstone ; 
by E. Hitcncock, Jr, - 239 
XX. On the Eruption at Hawaii; by Bi, Tivs Oeil - - 240 
XXI. On the Purification of ee pepacaticl ; by M. Er- 
nest NickLés, - 244 
XXII. Third Supplement to Dana’ s ‘isiaidays ; by the Ait, 246 
XXII[. Correspondence of M. Jerome Nickuis—Academy of 
Sciences—Death of M. Binet: Agricultural Universal Exhi- 
bition: Fecula of the Horse-chestnut, 264.—Astronomy : 
View of a part of the surface of the Moon, 265.—Meteor- 
ological System of France, 266.—Inundations : Electricity 
: —Substitute for the copper wire in the construction of He- 
s lices, 267.—Effects with Ruhmkorff’s Apparatus of Induc- 
: tion: Electric Chronometers: Gas and Steam Manometer 
Alarm: On a Cause of Atmospheric Electricity, 268.— 
Bibliography, 269. — 
SCIENTIFIC INTELLIGENCE. 
Chemistry and Physics.—Some experiments in Electro physiology, by Prof. MatrTrvcct, 
270.—Selenium : Iodine, 271 
veined and Geology.—Meteoric Iron of Thuringia, 271. —Meteoric Iron of Cape of 
Good Hope: Meteoric Stone of Mezé-Madaras in Siebenburg: On the Volcanoes of 
aehain Italy, 272.—On the Isthmus of Suez, by M Renavp, 273.—On the Mines of 
Mineral Coal in Peru, by M. E. pe Rivero, 274.--Waters of Lake Ooroomiah, by 
Heney Wirt, 276 —On the Koh-i-Noor Diamond, 278.—On the origin of Greensand 
and its furmation in the Ocean of the present epoch, by Prof. J. W. BarLey, 230. — 
[See also, p. 296.] 
- Botany and Zoology.—Wild Potatoes in New Mexico and Western Texas, 284.—Notes 
alved Entomostraca: Cum eee 235 eorgtee Maderensia, or Insects 
” of the Maderian Group, by T. Vernon Woutastos, M.A., F.R.S.: On the Variation 
| of Species with especial reference to the mes, pea ba an inquiry into the Na- 
, © ture of Genera, by the same, 236..--On e Fresh water Entomostraca of South 
: America, by Joun Lussock, Esq., F.Z.S 
on Paleozoic Biv 
