100 REPORTS ON THE STATE OF SCIENCE. 



The Study of Isomorphous Sulphonic Derivatives of Benzene. — 

 Report of the Committee, consisting of Principal Miers (Chairman), 

 and Professors H. E. Armstrong (Secretary), W. J. Pope, and 

 W. P. Wynne. 



In the previous report it is pointed out that a clue to the interpreta- 

 tion of the results put forward in earlier reports had been found in 

 the theory correlating molecular structure with crystalline form recently 

 advanced by Messrs. Barlow and Pope. 



During the past year the results obtained by the examination of 

 twenty-nine derivatives of the 1 : 4 series have been discussed from 

 the point of view of this theory and found to be in complete accordance 

 with it. The investigation is published in two papers printed in the 

 current August number of the ' Transactions of the Chemical Society.' 

 It is hoped that the examination of the ortho- and meta- series will 

 be completed during the coming year and that it will then be possible 

 to summarise the results of the inquiry in a final report. 



Erratic Blocks of the British Isles. — Report of the Committee, con- 

 sisting of Mr. R. H. Tiddeman (Chairman), Dr. A. R. Dwerryhouse 

 (Secretary), Dr. T. G. Bonney, Mr. F. M. Burton, Mr. F. W. 

 Harmer, Rev. S. N. Harrison, Dr. J. Horne, Mr. W. Lower 

 Carter, Professor W. J. Sollas, and Messrs. Wm. Hill, J. W. 

 Stather, and J. H. Milton. , . 



Reports have been received during the year from three districts, in 

 each case through a local Society : The University of Durham Philo- 

 sophical Society, per Dr. Woolacott; the Hull Geological Society, per 

 Mr. J. W. Stather, F.G.S., and the Belfast Naturalists' Field Club, 

 per Miss Mary K. Andrews. 



Northumberland and Durham. 



Reported by the Boulders Committee of the University of Durham 



Philosophical Society. 



(1) Reported by Dr. Woolacott. 



(a) Old sand-pit, North Moor Lane, Silksworth, near Sunderland: — 



Volcanic series of Borrowdale. Cheviot- porphyrite. Several granites. 

 Coal. Magnesian limestone (numerous). 



(b) Sand-pit near Bainbridge Holme Farm, Durham Pioad, near 

 Sunderland : — 



Whin Bill. Greywaeke. Volcanic series of Borrowdale. Magnesian 



limestone. 



