CONTENTS of NUMBER XXY. 



Page 



I. Refearchcs refpeftfng the Compolition of Enamel. By 



C. CtouET, Affociate of the French National Inftitutc - 3 



II. On a new fulminating Mercury. By Edward Howard, 

 Efq. F.R.S. - - - - - 17 



III. On the Origin and Progrefs of the Manufafture of 

 Pig-Ircn with Pit-Coal ; and Comparifon of the Value and 

 Effcfts of Pit- Coal, Wood, and Peat-Char. By Mr. Datio 

 Ml'Shet " t - - - 35 



IV. Advantageous Method of feparating the whole of 

 the tartarous Acid from crude Tartar. By M. Lowitz ; 

 abridged by Dr. Van MoNS, of Bruffels - - 46 



V. On the Method of preparing Ether by the Muriatic 

 Acid, or the Marine Ether of the Shops. By J. B. Van 

 MoNs - - . _ , - 48 



VI. Obfcrvations upon an unufual horizontal Refraftion of 

 the Air ; with Remarks on the Variations to which the lower 

 Parts of the Atmofphere are fometimes fubjeA. By the Rev, 

 S. ViMCE, A. M. F. R. S, and Plumian ProfefTor of Aftronomy 

 and experimental Philofophy in the UniverCty of Cambridge 54 



VII. Cafe of Tetanus cured by Wine. Communicated in 

 a Letter to Dr. James Gregory, Profcflbr of the Prafticc 

 of Phyfic in the Univerfity of Edinburgh, by Dr. David 

 HosACK, Profeflbr of Botany and Materia Mcdica in Co- 

 lumbia College - •. . . - - 63 



VIII. On the Expanfion of Water during Congelation. 

 Communicated" in a Letter from Stephen Dickson, M. D. 



to Dr. Mitch ILL, of New- York - - - 69 



IX. TheThcQiyof Explofions. Communicated in a Letter 

 from Mr. Blanchet to Dr. Mitchill, Profefr,>r of Chemiflry, 

 Natural Hiftory, and Agriculture, in Columbia College, in the 

 State of New- York - - - - 71 



X. Letter from Dr. Van Mons, of Bruffels, to J. C. De- 

 X.AMETHERIE, on the conflituent Principles of fixed Alkalies, 



ice. ' - - - - : . 76 



XI. Qurfory View of fome of the late Difcovcrics in 

 Science - . . _ . - yg 



New Publications r - • - 8 1 



InTELWGBNCE and MiSCEtLANEOUS ARTICLES. 



French National Inftitute. — -Aflronomy.— ^-The Ccnnefticut 

 Academy of Arts and Sciences. — ChemFftry. — Metliod of re- 

 ftoring Writing which has been effaced by oxygenated muriatic 

 Acid. — Botany. — A new Volcanic Ifiahd.— -Vaccine Inoculatioa. 

 — New Voyage of Difcovery, — Diicovcries in Africa. — BrewiiJ|r' 

 s~JLctter to •!>£ Lditor,— Deaths. 



