C vi 1 
IX. On a new Property of the Tangents of three Arches trisect- 
ing the Circumference of a Circle. By Nevil Maskelyne, D. D. 
F. R. S. and Astronomer Royal. p. 122 
X. An Account of the Application of the Gas from Coal to econo- 
mical Purposes. By Mr. William Murdoch. Communicated 
by the Right Hon . Sir Joseph Banks, Bart. K. B. P. R. S. 
p. 124 
XL Further Experiments on the Spleen. By Everard Home, 
Esq.F.R.S. p. 133 
APPENDIX. 
Meteorological Journal kept at the Apartments of the Royal 
Society , by Order of the President and Council. 
