CONTENTS. iii 



VII. Outlines of Experiments and Inquiries refpefting Sound and Light. By 

 Thomas Young, M.D. F.R.S. - - - - p. 72 



Quantity of air difchargcd through an aperture — Direftionand velocity of a flream of air: — Ocular 

 evidence of the nature of found. 



Scientific News, Accounts of Books, &:c. - - p. 78 — 80" 



Galvanic Pile, confifting of one and tho fame Metal throughout. — Philofophical Tranfaftions of the 

 Royal Society of London, for the Year 1 800. — Analytical Eiliiys towards promoting the Che- 

 mical Knowledge of Mineral Subflauces.^-An Epitome of Cheniiftry in three Parts,— Eieftric 

 Shock from a Jar by means of (iuKanifin. 



JUNE 1801. 



Engravings of the following Objefts : 1. Dr. Young's Figures illuftrating t«he 

 Do£trine of Sound j and, 2. Scales of Mufical Temperaments. 



I. Outlines of Experiments and Inquiries refpe£l:ing Sound and Light. By 

 Thomas Young, M.D. E.R.S. {Continued from page 78.) p. 81 



II. On the Identity of the Pyro-mucous, Pyro-tartareous, and Pyro-ligneous 

 Acids, with the Acetous Acid. By Citizens FourcTroy and Vauquelin. p. 91 



III. On the Strufture and . Ufes of the Membrana Tympani of the Ear. By 

 Everard Home, Efq. F.R.S. - - - p. 93 



IV. Inquries relative to the Laws of Affinity. By Citizen BerthoUet, Member 

 of the National Inftitute of Arts and Sciences. (Concluded from page 69.) 



p. 97 



V. A Memoir on Mortars, Water Lime, Cement, and Pouzzolana. By Cit. 

 Guyton. - - - - - p. 10.9 



VI. On the Combination of the Metals widi Sulphur, by Cit. Vauquelin. p. 114 



VII. On the Precipitate formed by mixing Muriate of Lime and Muriate of 

 Magnefia. By W.' Lambc, M.A. - - - P-,M8 



Scientific News, Accounts of Books, &c. - - p. 119 — 120 



Gratuitous Analyfis of Minerals, bv the Britiili Mineralogical Society. — Four EfTays on Praftical 

 Mechanics; the firil On Water Wheels; the fccond on the Steam Engine; the third on Mills ; 

 find the Iburdi on the Simplilication of Machinery. By Thomas Fen%\ick, Coal Viewer. 



b2 JULY 



