60 Mr. H. K. G. Morgan on the Use of the 



near Kissingen, the Adelheids quelle, near Heilbroun, and 

 above all, the springs of Kreugnach, which have been 

 found highly beneficial in scrophulous diseases when inter- 

 nally administered, their action being dependent entirely on 

 the chlorides, iodides, and bromides they contain. Sea-water 

 would afford similar advantages for bathing, and when evapo- 

 rated to dryness, the residue might be kept in earthen vessels, 

 and thus be conveyed to any distance; and as its constituents 

 are very soluble, sea-water in perfection might be procured at 

 any place. The evaporation of sea-water should be performed 

 with care, and the ingredients kept by chemists. One great 

 advantage would accrue from this method, viz. that sea-water 

 could be had of any degree of concentration which the prac- 

 titioner might deem necessary. At the baths of Kreugnach, 

 for example, extraordinary effects have been produced when 

 from 4<0 to 70 quarts of the mother liquor were added to the 

 natural salt-water of that spring, and this mixture used for 

 bathing. 



German Spa, Brighton, June 1839. 



Xr. On the Use of the Galvanic Battery in Blasting. By 

 Hamilton K. G. Morgan. 



To the Editors of the Philosophical Magazine and Journal. 

 Gentlemen, Johnstone Castle, Wexford, May 24, 1839. 



T BEG to trespass on your time by this letter on the use of 

 •*- the galvanic battery, instead of the fuze in blasting. 



The papers have given short descriptions of the experiments 

 made at Chatham, but all the details were not given. I com- 

 menced my experiments on blocks of the old trees that were 

 blown down by the late storm. I first prepared an igniting 

 cartridge by joining two pieces of clean copper wire to the 

 extremities of a steel wire taken from the scratch brush, such 

 as is made use of by gun-makers ; this steel wire is fastened 

 to the copper wires by waxed silk ; the length of steel wire 

 to be deflagrated is one- fourth of an inch ; a piece of very 

 slight wood is spliced to both copper wires to protect the 

 steel wire from any accident — it makes the whole strong and 

 more convenient to be introduced into the small cartridge,which 

 is either a quill or a small paper tube. They are filled with 

 fine powder, and made air-and water-tight, to prevent the 

 powder from getting damp and rusting the steel wire; a se- 

 cond small piece of wood is then fastened to this small cart- 

 ridge and the copper wires ; one of the wires is bent over this 

 piece of wood and brought up at an angle with the other up- 



