TABLt .OF CONTENTS 



TO THIS NINETEENTH VOLUME. r>- 



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Engravings of the following Objects: 1. Guide to. the Constellations: 2. Mr. 

 Machine for Glaziers: 3. Mr. Davy's Experiments. on Galvanism! 



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I. An Account of the relative Situations of the different Stars; ( by whjcja the 

 principal Constellations mav be distinguished. From la Lande's'Astrbnomv, 

 third Edition, Art. 743, &p, - - - -; .d .R ge 1 



II. On the Advantages of Malleable Zinc, aiid the Purposes to which 1 it may be 

 applied. By Mr. Charles Sylvester - - ] i 



III. Description of Mr Davis's improved Machine for Painters and Graders 13 



IV. Answer to some Observations of Mr. Dispan on the pretended Attraction 

 of Surface between Oil and Water ; by J. Carjadori de Prato, M r D." 14 



V. Abstract of an Essay on the Medicinal Properties of Plants compared with 

 their external Form and natural Classifications : by Mr. Decandolie- 17 



VI. Analysis of the Siderite, or Lazulite; by Messrs. Trommsdorff and Bern- 

 hardt - - - - - 20 



VII. On the Preparation of 'pure Barytes; by Mr. Robiquet - 23 



VIII. Remark on the spontaneous Decomposition of the hidroguretted Sul- 

 phuret of Bary tes : by Messrs. Robiquet and Chevreul - . 25 



IX. Remark on a. Property of Camphorated Water: by C. A, Cadet, Apothe- 

 cary in ordinary to his Majesty - - - - 26 



X. Report on a Memoir of Mr. Destouches, Apothecary at Paris ; by Messrs. 

 Vauquelin and Boullay. Read at the Parisian Society of Pharmacy, Fe- 

 bruary lo, 1807 - - - • - ' 2& 



XT. Mineraiogica] Description and Chemical Analysis of a Stone, called Py- 

 rophysalite: by Messrs. Hisinger and BerzelLus - - 33 



XII. On some Chemical Agencies of Electricity : by Humphrey Davy, Esq. 

 F. R. S. M. R. I. A. - - - - - 37 



XIN. Memoir on the Analysis of the Sweat* the Acid it contains, and the Acids 

 of the Urine and Milk ; read to the National Institute by Mr. Thenard 03 



XIV- Remarks on Orpirnent and Realgar: by Mr. Thenard - 74 



Scientific News - - - - ' 78 



FEBRUARY, 



