xxiv Proceedings [March ijth, igoj. 



Mr. William Thomson, F.R.S.K., read a paper entitled 

 " Further Investigation of the Detection and Approxi- 

 mate Estimation of Minute Quantities of Arsenic in 

 Malt, Beer, and Food Stuffs," in which he pointed out that 

 he had greatly improved the process which he had already 

 published. 



The apparatus described was exhibited, and a series of 

 lantern slides was also shown in illustration of the i)aper. 



Ordinary Meeting, March 17th, 1903. 



Charles Bailey, M.Sc, F.L.S., President, in the Chair. 



The thanks of the members were voted to the donors of the 

 books upon the table. The recent additions to the Library 

 included the following: — "Notes o?t Sampling and Testing'" 

 (8vo., Manchester, 1903), presented by the Manchester 

 Chamber of Commerce ; " Memorials of Robert Spears, 

 182^-gg" (8vo., London, 1903), presented by Mr. F. J. 

 Burgoyne ; and " Instructiotis to Observers of the Indian 

 Meteorological Department" by J. Eliot, 2nd edition (8vo., 

 Calcutta, 1902), presented by the Department. 



Mr. J. Cosmo Melvill, M.A,, F.L.S., exhibited two 

 holograph letters of Linnceus, written in 1758 and 1769 

 respectively, the former to Mr. Richard Warner, of Woodford, 

 the latter to Professor David van Royen, of Leyden. These 

 letters had recently come into Mr. Melvill's possession through 

 the medium of Mr. R. Morton Middleton, F.L.S., who had re- 

 discovered them, they having been missing for over 80 years. 

 A full account of the contents of the letters is given in the 

 Proc. Linn. 6(?<:., Session 190 1-1902, p. 48. 



