Chemistry and Physics. 503 



rhombic block could be observed, lifted above the surrounding 

 slate. 



At almost every place in the city and east and west of it, 

 where the glaciated ledges of the slates of the St. John Group 

 could be observed, some displacement was seen, though often 

 very slight. At the N.E. corner of the Church of England 

 burying-ground, east of the city, there is a ledge which shows 

 two slight faults (J inch each) with a downthrow on the south, 

 eastward of Courtney Bay, at its head, the slates at the shore and 

 on the road, have about a dozen faults with throws varying 

 from one half an inch to an inch ; these in almost all eases 

 have the downthrow on the north side. 



A fuller account of these faults will be given in the next 

 Bulletin of the Natural History Society of New Brunswick, 

 with some conjectures as to the causes which have produced 

 them. 



St. John, X. B., Canada, November 1, 1894. 



SCIENTIFIC INTELLIGENCE. 



I. Chemistry and Physics. 



1. On the new Iodine Bases. — Several additional salts of the 

 new iodonium bases, discovered by V. Meyer and Hartmann,* 

 have been described by these chemists. The nitrate (C 6 H 5 )„I. N0 3 , 

 obtained by neutralizing a concentrated solution of the tree base 

 with strong nitric acid, appears as a white crystalline precipitate, 

 readily soluble in hot water, from which it separates on cooling 

 in small plates or spear-like crystals. It fuses at 153°-154°, to a 

 clear liquid which soon begins to decompose and evolve gas ; 

 exploding if the quantity is considerable. The acid sulphate is 

 produced by adding sulphuric acid in slight excess to a strong 

 solution of the free base, and evaporating. The crystalline mass 

 is dissolved in alcohol and on adding ether, the salt separates in 

 colorless crystals reacting acid to litmus. The acetate is ob- 

 tained by agitating iodobenzene with caustic soda and adding 

 acetic acicl. On filtering the warm solution, it deposits on cool- 

 ing crystals of the acetate, which melt at 120 p . One of the most 

 interesting salts is the periodide, obtained by mixing the iodide 

 of the base with an alcoholic solution of iodine and triturating. 

 Combination at once takes place producing a brownish red pre- 

 cipitate, which yields, on crystallization from alcohol, dark red 

 lustrous crystals having the composition (C 2 H 6 ) 2 I. 1. 1 2 and fusing 

 at 138.° The sulphides are remarkably similar in appearance to 

 the sulphides of lead, thallium and antimony. On mixing a solu- 



* This Journal, III, xlvii, 399, May, 1894. 



