Miscellaneous Intelligence. 303 



takral Pressure of Running "Water ; by Thomas Green. 



On a new Maximum Thermometer ; by Thomas Green. 



On a new method of Determining the Conamercial value of Saltpetre • bv E I^ 

 Horsforcl. r » j 



An enquiry into the causes of a peculiar discoloration of Coffee, which had been 

 stored in the same building with Guano ; by Dr. Lewis H. Steiner. 



n^ Geology and Natural History. 



On the Flexures of the Strata in the Broadtop Coal Field, Penns^^lvania ; by J. 

 r, Lesley. 



On Comparative Sections in Western Kentucky, and "Western and Eastern Penn- 

 sylvania ; by J. P. Lesley. 



On the Variety and Preservation of the Stembergia ; by J. W. Dawson. 



On the Newer Pliocene Fossils of the St, Lawrence Vallej* ; by J. W. Dawson. 



On the division of the Azoic Rocks of Canada into Huronian and Laurentian ; by 

 Sir W. E. Logan. 



On the probable subdivision of the Laurentian series of Canadian Eocka ; by 

 Sir W. E. Logan, 



_ On the relative dates of the various intrusive Rocks, cutting the Laurentixm Series 



in Canada ; by Sir W. E. Logan, 

 On some Mineral Waters, and on the origin of Magnesian Rocks; by T. S. Hunt, 

 On the Parallelism between the rocks of the Laurentian and Silurian Systems ; 



by T. S. Hunt. 



On some intrusive rocka of the District of Montreal; by T. S. Hunt. 

 General Considerations on the Metamorphism of the Sedimentary Rocks ; by 

 T. S. Hunt. 



On a subsidence on the Coast of New Jersey and some of the adjoining States ; 

 by Geo. H. Cook, Rutger's College. 



Notice of a New System of Dressing Metallic Ores ; by R Silliman, Jr. 



On some Debatable Points in Natural Science ; by E. J. Chapman, Toronto. 



On a Species of Trilohite and Pleurotomaria from the Potsdam Sandstone of 

 New York ; by J. D. Dana. 



On the General Plan and Mode of conducting the Geological Survey of Great 

 Britain; by A. G Ramsay. 



On the Physical Break and the Break in the Succession of Life m the British 

 Socks ; by A. C. Ramsay. 



On the place in the Geological series of the masses of Crystalline or Sub-crystal- 

 iine Stratified Rocks, in the North Highlands of Scotland ; by Sir Roderick Murchi- 

 son^ with a Note on the Fossils by J. W. Salter. 



On Graptopora, a new genus of Polyzoa allied to the Graptolites ; by J. w. Salter. 



On the Fluctuations of Level in the North American Lakes ; by Cbas. Whittlesey. 



Notice of the occurrence of Chrysolite in Basalt; by O. P. Hubbard. 

 ^ On the occurrence of Sharks' Teeth in the Drift of the Mississippi; by A. H. 

 Wortlien. 



A critical review of the different Measurements of Mount Washington, In the 

 White Mountains of New Hampshire ; by A. Guyot 



On the Physical Structure of the Continent of Africa; by A. Guyot. 



On the General Distribution of Large Forests on the Globe as connected with 

 certain Climatic conditions; by A. Guyoi 



. On the Direction of Ancient Currents of Deposition and the source of Materials 

 *^the Older Paheozoic Rocks, with Remarks on the Origin of the Appalachian Chain 



of Mountains ; by Jame$ Hall. ,,..,. . ^ 



On the Cretaceous furmalions of the United States and the North American Con- 

 sent; by James Hall. 



On the Carboniferous Limestones and Coal Measures of the United States ; by 



•fames HalL 



On the comparative extent and distribution of the Limestones of the Pakrozoic 

 period, and the similarity of forms among fossils of the different epochs; with re- 

 marks upon the probability of different centres of distribution for the fauna of the 

 same epoch ; by James HalL 



^ Contributions to the Qeoloffv of California and the Gadsden Purchase : by T, 

 AntiseD. ^^ 



5 



