TABLE OF CONTENTS 



TO THIS FIFTH VOLUME. 



MAY 1803^ 



Engravings of the following Objecls : 1. An improved Gun Lock, by Mr. John 

 Webb; 2. An Apparatus for fplitting Logs of Wood, by Mr. R. Knight; 

 3. Mr. Ecclefton's Peat Borer; 4. The Onifcus Praeguftator, as it refides in 

 the Mouth of the Bay Alewife j 5. Outline of the Clupea Tyrannus or Bay 

 Alewife; 6. Figure to illuftrate a new Method of computing the Longitude, 

 by Mr. Andrew. 



I. A Drawing and Defcrlption of the Clupea Tyrannus and Onifcus Praeguf- 

 tator. By Benjamin Henry Latrobe, F. A. P. S. - - - I' 



II. The Principles on which the Purification of Fifh-oil may be performed, and 

 of the Ufes to which it is applicable. By Robert Doffie. - j 



III. An EfTay on the Fecula of Green Plants. By ProfeiTor Prouft. 16 



IV. Defcription of a Borer for draining Boggy land. By T. Ecclefton, Esq. 28 



V. Defcription of an Improvement in the Gun-Lock by which the cafual Dif- 

 charge of the Piece is prevented. By Mr. John Webb. 29 



VI. Defcription and Account on a fimple Apparatus for breaking-up Logs of 

 Wood by the Explofion of Gunpowder. By Mr. Richard Knight. 3i 



VII. Letter from Mr. Dalton, containing Obfervations concerning the Deter- 

 mination of the Zero of Heat, the thermometrical Gradation, and the Law 

 by which denfe or non-elaftic Fluids expand by Heat. 34 



VIII. Memoir containing the Phyfical and Chemical Examination of the Teeth. 

 By Cit. JoiTes of Rennes. - ------ S6 



IX. A new Method of clearing obferved Lunar Diftances of the Effects of Pa- 

 rallax and Refraction, for the Purpofe of determining the Longitude at Sea or 

 Land. By Mr. J. Andrew. Communicated by the Author. - 43 



X. Analyfis of the Propolis or Maftic of Bees. By Cit. Vauquelin. 48 

 XI- Memoir on the cutaneous aeriform Tranfpiration. Read at the public 



Sitting of the Society of Health, at Grenoble, the 4th Frimaire, in the Year 

 11. By Cit. Trouffet, M. D. &c 50 



Scientific News, 54, — Decree of the French Government relative to the new Or- 

 ganization of the National Inftitute, ib. — Galvanic information, 58. — Prize 

 queftion, 59, — Hermaphrodite fifli, 60. — Experiments calculated to prove that 

 the Laws of Galvaniim appear to differ from thole of Electricity. By La- 

 grave, Member of the Galvanic Society, ib. — Galvanic Experiments, tending 

 to afcertain the Exiftence of two Fluids in the Animal Economy, the one pofi- 

 tive and the other negative, which, by their Union, appear to produce the 

 Agency of Vitality. By Lagrave, Member of the Galvanic Society. 62 



Account of New Books, 63. — Tranfactions of the American Philofophical So- 

 ciety held at Philadelphia for promoting uleful Knowledge, ib. — The Che- 

 mical Pocket Book, or Memoranda Chemica j arranged in a Compendium 

 of Chemiftry. By James Parkinfon, Holborn. 64 



JUNE 



