452 Mr. Allan on the Cure of [June 



Which approaches very nearly the following formula : 



/« fn. + \\ mn. Tn. 

 But, if we deduce the atomic weight of Tungstic acid 

 from the last analysis, we have, 



26*95 (the whole bases) : 4*5 (an atom of bases)'.'. 

 73*60 (the whole acid) : 12*28 (an atom of acid) 

 Approaching 12*25 as nearly as can be expected from the 

 inaccuracies incidental upon experiments. Employing 12*25 

 then, as the atom of tungstic acid, and calculating as before, 

 we get atoms. 



Tungstic acid .... 6*00 or 2*41 nearly 2| 

 Protoxide of iron . . 2*49 „ 1*00 „ 1 

 Protoxide of manganese 3*50 ,, 1*40 ,, 1J 

 represented by the formula, /Tn. + 1| mn. Tn. 



The difference between this and former analyses would 

 lead to the opinion that they were different species, since 

 both that of Berzelius and the present one agree exceedingly 

 well, with the atomic proportions deduced from the formulae 

 by which they are represented. 



Great doubt still hangs about the atomic weight of 

 tungstic acid, and further experiments are required to 

 elucidate the subject. 



Article VIII. 



Erysipelas of the Extremities Successfully Treated by 

 Mechanical Pressure. By James Allan, Esq. Surgeon. 



Dear Sir, 



Should you deem the following cases illustra- 

 tive of a new and effectual method of treating Erysipelas of 

 the extremities worthy of a place in your valuable Journal, 

 you will oblige me by inserting them, 



Dear Sir, yours truly, 

 10, Cannon Street, &th March 1835. James Allan. 



To Dr. R. B. Thomson. 



Case 1st., April 5, 1823. — Mrs. H. aged 40, of a sanguine 

 temperament and plethoric habit, complains of consider- 



