Observations on the exact quantity of volatil-acid salts, which are contained in the different acid salts, by Mr Homberg Notes on the first page state that the paper was read on 21 June 1699 and entered in the L[etter] B[ook] volume 12 page 110, 29 April 1699. A second note reads 'Mem. Acad. 1699'. Includes one diagram. A note on the inside front cover of the volume states 'from the Memoirs of the Academie 1699. Not worth cataloguing'. 1699