420 



il^gskd antr Chemical S^ctbn. 



At a meeting held in the Library of the Bristol Museum and Library, on 

 12th December, 1877, Mr. Leipner, Hon. Sec., B.N.S. in the Chair, it was 

 resolved that a Section should be constituted under this title. "Rules were 

 drawn up, and the following Officers elected for the ensuing year : — 

 President — Philip J. Worsley, Esq. 

 Secretary — William A. Tilden, Esq., D.Sc. 



During the year 1878 eight meetings of the section were held with an 

 average attendance of seventeen, not including one meeting when the 

 Phonograph was exhibited by Professor Sylvanus Thompson, and there was 

 a large gathering of Members of the Society. 



The following communications have been made to the section during the 

 year : — 



1. W. W. Stoddart, Esq., E.G-.S. — "On a remarkable occurrence of 

 Indican in the Human Body." 



2. Professor Thompson.—" On Vortex Motion in Liquids." 



3. J. Gr. Grenfell, Esq. — "On Super-saturated Solutions." 



4. Professor Letts. — " On some Bismuth Residues." 



5. Professor Thompson. — " On Conduction of Heat by Crystals." 



6. Dr. W. A. Tilden. — "On Hofmann's Method for the Determination 

 of Vapour Densities." 



7. Professor Thompson. — "On Edison's Phonograph." 



8. Dr. G. S. Thomson exhibited the " Phonoscope." 



9. Dr. W. A. Tilden. — " On the Specific Gravities of Liquids ; a means of 

 -determining them accurately, with remarks on the calculation of results." 



10. N. Collie, Esq.—" On Baryto-Ccelestine found in Clifton." 



11. Dr. H. E. Fripp.— " On the Theory of Illuminating Apparatus used 

 with the Microscope." 



2. Dr. W. A. Tilden. — " An Experiment demonstrating the Dissociation 

 of Sal—Ammoniac by Heat." 



W. A. TILDEN, Eon. Sec. 



