CONTENTS. 
Professor Davseny on the Chemical Principles involved in the Rotation of Crops 
Professor Jounston on the Chemical Principles of Rotation of Crops........s05. 
Mr. J. Taomas Way on the Analysis of the Ashes of Plants........... epclweccestee 
Professor Jounston’s Observations on the Ashes of Plants ........ccscssesescncece 
Mr. J. P. Norton on the Ashes of Oats...cssscsccsessesssescsscesseeesseserecssesences 
Mr. F. C. Wricutson on the Ashes of Narcotic Plants ...ccsccsssscscseseectecess 
Mr. Wixturam SHarp on the Ashes of Wheat....sscsccsseccececseecetecesseces asipeeot 
Mr. E. G, Sco weitzer’s Analysis of three species of FUCUS......cses.seseseceseees 
Mr. J. P. Norton on the Composition of Slate Rocks and the Soils formed 
from them .c.cccccsccesees Se viivaecetuseuvs TM rite Lie Lut ee: “PR ehadb.ceweate 
Professor Lizpie on Mineral Manure .........ssecsceeceeeees COTM ATH Sei sabbeakd 
Dr. CANTER 0 Malacca Guano ..........ccccececceecceceenceees Sodan ceeansaeceteet ‘ 
Mr. Tuomas J. Pearsaxu on Masses of Salt discovered in the lowest portions 
MP WeUANO OF Cie ISTANG OM ECHABUC .1..cenccsececsusccastcvaseccesees ous cautcseus classe 
GEOLOGY AND PHYSICAL GEOGRAPHY. 
Rev. Professor Sepe¢wick on the Geology of the Neighbourhood of Cambridge, 
including the Formations between the Chalk Escarpment and the Great Bed- 
ford Level ......ss.sss00+ Ele daven cus saws Gens schassetsueescey Sou geabnn gncieaeso ee rane sutetet Se 
M. Ferpinanp Oswatp on the occurrence of Silurian Rocks at, the Villages 
of Ober and Neu Schmollen, near Breslau, in Silesia, and covering an area of 
about eight square English miles ..............ccssscsecscscesceccececeecesesessccscecs 
Professor GOprERt’s Tabular View of Fossil Plants ..............se00e0 Ben eeeeence 
Dr. Buckuanp on the Agency of Land Snails in forming holes and trackways 
in Compact Limestone ....,.........ceceeeens Eatesneoeuier tovnssctrepeetets etna tears 
Mr. S. P. Prarrt on the Coal Deposits of the Asturias ..........- peaceedt une et 
Mr. A. C. Ramsay on the Denudation of South Wales and the adjacent 
Counties ............ Siweees stias Rakisene sete cnceratt.Gocaccsetcatne Radieeren ets peakbewtecsne 
Dr. Dizrrensacu on the Geology of New Zealand ............0 sbeUsteck sumesevue 
Sir R. Scpomsurex on the Lake Parima, the El Dorado of Sir Walter Raleigh 
and the Geography of Guiana. ..............+ MEO ey bes sukap amen pasis cache 
Mr. H. E. Srrickianpn’s Notice and Drawings of the Footprints of various 
Animals on the New Red Sandstone of Corncockle Muir ........... mmntnon ps diay 
Professor Henstow on Nodules, apparently Coprolitic, from the Red Crag, 
London Clay, and Greensand ............2+002- wou geeecdeessandecsaecs.scastapanurs aoe 
Rev. Dr. Buckianp on the Mechanical Action of Animals on Hard and Soft 
Substances during the Progress of Stratification .........secsssssseceseces Saeaeeeehe 
Extract of a Letter from Mr. Hopkins respecting Traces resembling Ornithich- 
MULGOR f) Rud bOMCRECS use. SCLELUARL cous toducked. sete ds Ce sbsdte dead 4b cbadi BBE TSS. vate 
Dr. Fauconsr on some New Additions among the Mammalia to the Fossil 
Fauna of India, from Perim Island, in the Gulf of Cambay «........ssssseeeee ‘ 
Mr. E. W. Binnery’s Remarks on Fossil Trees at St. Helen’s, Lancashire, which 
exhibit Stigmariz as their Roots ...........0 Se smb fNemeb tease ssvesavephecWeocks 
Mr. James Suir on the Subsidence of the Land at Puzzuoli ........sesssscsesese 
Professor AnsTEp on the Methods of Working and Ventilating the Coal-mines 
of the North of England, with reference to the Accidents that occur in such 
Mines from the Explosion of Firedamp ...ssseceseeeeesees daducuabiguclacewewsedeons 
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