VOL. XXXVIII.] PHILOSOPHICAL TRANSACTIONS. 60Q 



and only 15 grains more than the water of a brackish fountain in that place. 

 2. A pound of the same water, distilled to driness, left behind in the bottom 

 of the vessel, half a drachm of a substance inclining to the nature of crocus 

 martis, sprinkled over with a scruple of a white and insipid earth: the loadstone 

 attracted some reddish particles from this dust after drying it. In the distilla- 

 tion a sulphureous smell was pretty sensible. And hence, after the experiments 

 of the celebrated M. Lemery, we have a new accession of arguments, that 

 subterraneous fires and volcanos may be easily accended by the commixture of 

 sulphur and iron ; and consequently, that earthquakes may be produced by the 

 successive kindling of latent fires. 3. Two drachms of the galls, called di 

 levante, and with which ink is made, reduced to a very fine powder, and in- 

 fused for 4 hours in 2lb. of that water, tinged it of a light azure colour, with a 

 subsequent precipitation of the powder. 



^ Lunar Eclipse observed at Rome, Dec. 1, 1732. By S. S. ReviUus, Botrario, 

 and Man/redi. N° 428, p. 85. 



True time, afternoon. 



At 8^ 4 5™ 28^ The penumbra was sensible. 



8 51 19 The beginning of the true eclipse. 



9 48 24 The total immersion, 



11 31 13 Beginning of the emersion. 



12 26 55 End of the eclipse. 



^n Eclipse of the Moon observed in Fleet-street, London, Nov. 20, 1732, at 

 Night. By Mr. Geo. Graham, F. R. S. N° 428, p. 88. 



Observed with a small telescope about IS inches long, which magnifies about 

 13 times. 



N. B. Mr. Hodgson at Christ's-Hospital, with a 4-foot telescope, observed 

 the beginning at 8*^ H"', and the end 1 1'' 36-^'". 



41 



