C iv ] 
XVIII. Observation of the great Eclipse of the Sun of Sept. 5, 
1793. By John Jerome Schroeter, Esq. Communicated by 
George Best, Esq. F. R. S. p. 262 
XIX. Experiments and Observations made with the Doubler of 
Electricity, with a view to determine its real Utility, in the in- 
vestigation of the Electricity of atmospheric Air , in different 
degrees of Purity. By Mr. John Read. Communicated by 
Richard Henry Alexander Bennet, Esq. F. R. S. p. 2 66 
XX. Tables for reducing the Quantities by Weight, in any Mix- 
ture of pure Spirit and Water, to those by Measure; and for . 
determining the Proportion, by Measure, of each of the two 
Substances in such Mixtures. By Mr. George Gilpin, Clerk 
to the Royal Society. Communicated by Sir Charles Blagden, 
Knt. Sec. R. S. P- 2 75 
XXI. Observations and Experiments on a Wax-like Substance, 
resembling the P6-la of the Chinese, collected at Madras by 
Dr. Anderson, and called by him White Lac. By George 
Pearson, M. D. F. R. S. P- 3 8 3 
XXII. Account of some remarkable Caves in the Principality of 
Bayreuth, and of the fossil Bones found therein. Extracted 
from a Pape r sent, with Specimens of the Bones, as a Present 
to the Royal Society, by his most Serene Highness the Mar- 
grave of Anspach, &c. -P- 4° 2 
XXIII. Observations on the fossil Bones presented to the Royal 
Society by his most Serene Highness the Margrave of Anspach, 
&c. By the late John Hunter, Esq. F. R. S. Communicated 
by Everard Home, Esq. F. R. S. P- 4 ° 7 - 
XXIV. Account of a mineral Substance, called Strontionite, in 
which are exhibited its external, physical, and chemical Cha- 
racters. By Mr. John Godfrey Schmeisser, F. R. S. p. 418 
