TABLE OF CONTENTS 



TO THIS SEVENTEENTH VOLUME. 



JUNE, 1807. 



Engravings of the following Objects: 1. Camera Lucida, byW. HydeWoi- 

 . laston, M. D. Sec. R. S. 2. Decompostion of Light. 



I. Description of the Camera Lucida. By W. H. Wollaston, Sec. R. S. £age 1 



II. Description of a new Boiler constructed with a View to the saving of Fuel. 

 By Benjamin Count of Rumford. Read at a Meeting of the first Class of the 

 National Institute the 6th October, 1800. - - 5 



III. Notice of an Experiment on the Use of the Heat of Steam, in Place of 

 that of an open Fire, in the making of Soap. By Benjamin Count of Rum- 

 ford. Read at a Meeting of the First Class of the National Institute, the 

 20th of October, 1800. - . . - H 



IV. On the Habitudes of Saline Bodies with Regard to Electricity. By Mr. Wil- 

 liam Skrimshire, Jun. Communicated by Mr. Cuthbertson. - 13 



V. On the Decomposition of Light into its most simple Elements: a Fragment 

 of a Work on Colours, by C. A. Prieur, formerly Colonel in the Corps of 

 Engineers, and Lecturer in the National Institution. - 18. 



VI. Wooden Matches for Artillery, to be used instead of Rope Match, or Port- 

 Fires: read at the National Institute, April 1800. By C. L. Cadet. 31 



VIT. Letter from a Correspondent on the Means of destroying the Insects whick 



infest the Houses in large Towns. - - - 38 



VIII. Theory of the Fabrication of Sulphuric Acid; read in the Class of Physi- 

 cal and Mathematical Sciences of the French National Institute, January the 

 20th, 180G. By Messrs. Desormes and Clement. - - 41 



IX. Facts toward a History of Cobalt and of Nickel. By Mr. Proust ; abridged 

 by Mr. Chevreuil. 46 



X. Facts toward a History of the Gallic Acid. By Bouillon Lagrange. 5S 



XI. Observations on the Soda, Magnesia, and Lime, contained in Water of 

 the Ocean ; showing that they operate advantageously there by neutralizing 

 Acids, and among others the Septic Acid, and that Sea Water may be ren- 

 dered fit for washing Clothes without the Aid of Soap. By Samuel L. Mit- 

 chill, of New York .... - 72 



XII. An Account of the" Improvement of an extensive Tract of Land. By 

 Richard Phillips, Esq. - - - - 74 



XIII. ScUntiflc News - - - - &5 



JULY, 



