CONTENTS. vii 



Page. 

 XV. Extract from an unpublished Essay upon the compounds 

 of Cyanogen; by Dr. William H. Ellet, of Columbia 



College, New York, 329 



XVI. Notice of an Essay on the Remittent and Intermittent 

 diseases, including generically Marsh fevers and Neur- 

 algia; by John MacCulloch, M. D., F. R. S., &c. &c. 338 

 XVII. Analysis of the Clinton Mineral Water, Cliff street, city 



of New York ; by George Chilton, _ - . 345 

 XVIII. On the Vegetation of the Ottawa and some of its tribu- 

 taries (L. Canada); by Prof. A. Benedict, - - 349 

 XIX. Notice of Piperin ; by T. G. Clemson, - - - 352 

 XX. An account of Depositions of Calcareous Tufa, at Chit- 



teningo, Madison Co. N. Y. ; by Prof. Edward Sanford, 354 



miscellanies DOMESTIC AND FOREIGN. 



1 . Note on Cardamine rotundifolia, by Wm. Darlington, M. D. 356 



2. On Xanthite, with a notice of mineral localities ; by Lt. W. 



W. Mather, -- 359 



3. Mode of adjusting lightning rods, - - - - 361 



4. Practical penmanship; by B. F. Foster, - _ . 353 



5. On a sesqui-sulphate of mercury ; by Lt. W. T. Hopkins, 364 



6. Meteorological table ; by Gen. Martin Field, - - 366 



7. Abstract of meteorological observations, made at Marietta — 



observations on the flowering of plants, ripening of fruits, 

 &c. inl829, by S. P. HiLDRETH, - . . . 355 



8. Wire gauze windows, a suggested protection against malaria; 



by R. C. Bond, M. D. 370 



9. 10. On the heating of water; by Dr. E. Emmons — On the 



carbonization of lignite, id. - - - - - 371 



1 1 . On the inflammation of phosphorus in a partial vacuum ; by 



Prof A. D. Bache, - ' 372 



12. On the use of black mica in spectacles ; by Dr. Wm. Meade, 374 



13. Geological facts ; by David Thomas, - - - . 375 



14. Cannel coal in Ohio, 376 



15. Plumbago of Sturbridge, Mass. ----- 377 



16. Notice of the fall of the Tennessee meteorites, - - 378 



17. Fountains of fresh and salt water, . _ . . 379 



18. Suggestions as to the variation of the magnetic needle; by 



Daniel Byrnes, 380 



19. 20. Premiums for useful inventions — Manufacture of silk in 



America, ----.... 352 



21. Porcelain of Philadelphia, 384 



22, 23. Improved scale of chemical equivalents — Report to the 



Regents of the University of New York, - - 385 



24, 25. History of the county of Berkshire, Mass. — History of 



Wyoming, ---_-__. 387 



26. Georgia Meteor and ^Erolite, - . _ _ _ 388 



27. Dr. Comstock's Natural History of Birds, - . . 389 



28. 29, 30, 31. Obituary — Correction— Collections of New Eng- 



land rocks with their imbedded minerals, for sale— Trans- 

 actions of the Society of Arts, Manufactures and Com- 

 merce, London, -.. = .... 390 



