Intelligence and Miscellaneous Articles. 153 



.peninsula next the Bay of Fundy, from Briers' Island to Cape Blow- 

 me-down, is one continuous narrow belt of trap, greenstone, and 

 amygdaloid. This belt is bounded to the south-east in its southern 

 part by St. Mary's Bay, and from the head of that bay to the Basin 

 of Mines, by the old red sandstone formation already described. The 

 trap overlies and pierces the sandstone at several points in its 

 course along the Bay of Fundy. At Cape Blow-me-down it forms 

 a perpendicular cliff 400 feet high, and rests on strata of sandstone. 

 If the axis of the Cobequial ridge be prolonged towards the west 

 until it meets the head of the Bay of Fundy, that axis, after pursuing 

 the Silurian zone which encircles the Cobequial granite, will enter 

 a trappean ridge composed principally of red felspar and porphyry, 

 about seven miles broad. The western extremity of the axis 

 on the Bay of Fundy is at Cape Chignecto, to the north-east of 

 which lies Chignecto Bay. The trap of Cape Chignecto is of two 

 varieties, the red and the green. The red contains several large 

 veins of sulphate of barytes. Near Shoolie, and at a place called 

 Cranberry Point, a conglomerate appears which consists of masses 

 of trap and of sandstone. It is near Apple River that the coal 

 strata, which extend to the north of this ridge of trap, come in con- 

 tact with it. The trap forms the axis from which the coal-measures 

 dip away until they become horizontal at Little Shoolie. 



XXV. Intelligence and Miscellaneous Articles. 



DETONATION OF THE ALLOY OF POTASSIUM AND ANTIMONY. 



THIS alloy, as is well known, may be prepared by calcining the 

 potassio-tartrate of antimony. MM. Fordos and Gelis state, how- 

 ever, that when the mass has not been sufficiently heated and the 

 metallic alloy has not separated, a porous mass is obtained composed 

 of the alloy and charcoal, which detonates without being moistened, 

 and by the mere blow by which it is attempted to be separated from 

 the crucible ; the above-named chemists state that one of them was 

 wounded by the explosion which occurred with a mass of this alloy. 

 — Journ. dc Ph. et de Ch., Octobre 1843. 









ON THE CHEMICAL CONSTITUTION OF WOLFRAM. 

 BY M. MARGUERITE. 



Chemists are agreed as to the nature of the elements which are 

 contained in wolfram, but they appear to be ignorant of the degree 

 of oxidizement in which the tungsten exists. In a late sitting of 

 the Institute M. Pelouze stated the results of the experiments which 

 M. Marguerite had performed to determine this point. 



Admitting, of which indeed no doubt can be entertained, that the 

 analyses of Vauquelin, Berzelius and Ebelmen are correct, the fol- 

 lowing formulas may be assigned to wolfram : — 

 1st. 3 Wo 3 FeO, MnO Wo 3 . 

 2nd. 3 W tt o 5 FeO 3 , MnO Wo 3 . 

 3rd. 4 (W 2 O 5 ) 3 (Fe 2 O 3 ) Mn 2 O 3 . 

 The author decides in favour of the last formula, which represents 



