CONTENTS. 
Account of Experiments made by the Assay Master of the King 
of the Netherlands,at the Mint of Utrecht, on the Native Cop- 
per existing in Blocks on the South Side of Lake Superior. 100 
Experiments on the Relation between Muriatic Acid and Chlo- 
TINe. ee oe ee ee oe oe ov - 201 
Experiments on Muriatic Acid Gas, with Observations on its 
Chemical Constitution, and on some other Subjects of Chemi- 
cal Theory. .. = a's es an wn OF 
Observations relating to the Operations undertaken io determine 
the Figure of the Earth. iA bg oe eee (1112) 
On the Means of curing the Dry-Rot. .. ee veel 
On the Question “ Whether Music is necessary to the Orator— 
to what Extent, and how most readily attainable?” 161, 241, 
401 
On the Astronomy of the Orientals.  .. os ase GS 
On the Performance of the Apollonicon constructed by Messrs. 
Fiicut and Rowson. .. ve oe oe ot ATT 
On the very correct Notions concerning the Structure of the 
Earth, entertained by the Rev. Joun MIcHELL, as early as 
the Year\1760. .. sy ag ae Ss ois oe 
Conjectures concerning the Cause, and Observations upon the 
Phenomena, of Earthquakes. .. .. 186, 254, 323 
Experiments on Muriatic Acid Gas, with Observations on its 
Chemical Constitution, &c, .. ais wi «aes 
On the Temperature of the Mines in Cornwall. .. .. 204 
Account of a Voyage to the Coast of Labrador and Quebec, in- 
cluding Remarks on the comparative Temperature of the 
Eastern and Western Hemispheres. .. ee -. 206 
On Arithmetical Complements es or ie ae 
Comparative Trials of the respective Merits of ‘ MassEy’s 
Patent Sounding Machine,” and one known by the Name of 
Goutp and Burt’s Buoy and Knipper. se we. ooh 
On the Modulus of Elasticity fe Air, and the Velocity of 
Sound. . ai habs ve 5. eta aa 
