CONTENTS. Vtt^ 



APRIL, 1807. 



Engravings of the following Subjects: 1. An Astronomical Circle, by Trough- 

 - ton ; 2. A Drag, for raising the Bodies of drowning Persons from the Water; 

 3. Diagram of a new Method of adjusting the 1 ransit Instrument. €0111010111- 

 cated by Sir li. C. Engletieki, Bart. M. P. F. R. S, &c. 



I. On the Inflammable Gas formed during the Distillation of Peat. By Thomas 

 Thomson, M. D. F. R. S. E. - - - - 241 



II. Observations on Professor Leslie's Theory of Caloric. By Dr. Halliday, of 

 Halesworth. ------ 270 



III. Description of a Drag for raising the Bodies of Persons who have sunk 

 under Water. By Dr. Cogan of Bath, - - - 273 



IV. Arguments against the Volcanic Origin of Basalt, derived from its Arrange- 

 ment in the County of Antrim, and from other Facts observed in that Country. 

 By the Rev. William Richardson, late Fellow of Trinity College, Dublin. 27T 



V. Method of adjusting a Transit Instrument in a Plane of the Meridian. By- 

 Sir H. C. Englefield, Bart. M. P. F. R. S. &c. - - 291 



VI. Observations on the Variation, and on the Dip of the Magnetic Needle, 

 made at the Apartments of the Royal Society, between the Years 178G and 

 1805 inclusive. By Mr. George Gilpin. - - - 294 



VII. A few Remarks on a Pamphlet entitled " Mr. W. Nicholson's Attack, in 

 his Philosophical Journal, on Mr. Winsor and the National Light and Heat 

 Company, with Mr. Winsor's Defence." . . - 308 



VIIL Account of the Small Whales in the Seas near the Shetland Isles. By 

 Patrick Neill, A. M. Secretary to the Natural History Society at Edin. 310 



IX. Method of preparing Parinels for Painters. By Mr. S. Grandi. 3 IS 



X. Scientific News: Small Portable Fire Engine, 318 — Enquiry respecting 

 -prease Spots, ib.— To Correspondents, 320. 



MAY. 



