[ vi ] 
XVIII. On the Nervous Ganglia of the Uterus. By Robert Lee, 31. D., 
F.R.S. page 269 
XIX. On a Cycle of Eighteen Years in the 3Iean Annual Height of the Barometer in 
the Climate of London, and on a constant variation of the Barometrical 31ean 
according to the Moons Declination. By Luke Howard, Esq., F.R.S. . 277 
XX. Computation of the Ratio of the Diameter of a Circle to its circumference to 208 
places of figures. By William Rutherford, Esq., of the Royal Military Aca- 
demy. Communicated by S. Hunter Christie, Esq., M.A., Sec. R.S. 8§c. 8$c. 281 
XXL Researches in the Theory of Machines. By the Rev. H. Moseley, M.A., F.R.S., 
Professor of Natural Philosophy and Astronomy, King's College, London 285 
Index 307 
Appendix. 
P, ’ esents .... . . [ 1 ] 
Meteorological Journal kept at the Apartments of the Royal Society, by order of the 
President and Council. 
ERRATUM. 
Page 229, line 2, for to prolong themselves into lymph, read to prolong themselves into the lymph. 
