The CONTENTS, 
VI. AnObfervation of an uncommon Gleam 
of Light proceeding from the Sun, by Mr. 
Peter Collinfon F. R. S. 456. 
VII. ExiraSl of a Letter from Mr. Benjamin 
Cooke F.R.S. to Mr. Peter Collinfon F.R.S. 
concerning the Property of new Flanel 
fparkling in the dark. 457. 
VIII. A Letter from Mr. John Hill, Apothe- 
cary , to the Prelident, concerning Windlor 
Loam. 45 8. 
IX. A Letter from Mr. Rob. Lucas, concerning 
. the Relief he found in the Stone from the Ufe 
of AlicantSoap and Lime-Water, jfe the Rev. 
Mr. Richard Lucas F.R.S. 463. 
X. The Figures of feme very extraordinary cal- 
culous Concretions formed in the Kidney of 
a Woman \ communicated by Mr. Charles 
Lucas at Dublin. 465. 
XI. Part of a Letter from Mr. William Ar- 
deron F. R. S. to Mr. Henry Baker F.R. S. 
concerning the Formation of Pebbles. 467. 
XII. A Letter from Arthur Dobbs Efq\ of 
Caftle-Dobbs in Ireland, to the Rev. Mr. 
Charles Wetftein, Chaplain and Secretary 
to His Royal Highnefs the Prince of Wales, 
concerning the Pdijlances between Alia and 
America. 471. 
XIII. A Letter from the Rev. Mr. G. Cof- 
tard, 
