196 Wisconsin Academy of Sciences, Arts, and Letters. 
Times, and found it successful, and believe the two Solutions to be 
the same Medicine, provided they are accurately prepared with 
either of the purified Salts. 
A Letter from Dr. Arnold, Physician to the General Infirmary, and to the 
Dispensary, \ at Leicester, (p. 117). 
Dear Sir: 
I was pleased to learn, by your last, that your intended publication rela¬ 
tive to the cure of intermittents by means of an arsenical Preparation, 
is in such forwardness; and shall willingly contribute my assistance, to 
establish the credit of a remedy of which I am led by experience to form 
a very favourable opinion. With this in view you at length receive a 
short sketch of my observations, on the use of Arsenic in the cure of 
intermittents; which I flatter myself will be found to correspond in a 
great measure with your own, and those of our friend, Doctor Wither¬ 
ing ; who first communicated to me the uses of this new Medicine, and 
the method of preparing it. 
I would most readily have sent you a complete summary of my prac¬ 
tice in this respect; in which I would have left it to facts to speak for 
themselves; but am obliged to decline an undertaking, which would re¬ 
quire more time than is compatible with your haste, and my present 
leisure. 
(p. 118) The medicine I have made use of is a solution of the common 
arsenicum album of the shops; of which the following is the formula. 
Recipe Arsenici albi pulveris subtilissimi grana octo, 
Aquae distillatae uncies octo. 
Digire in blaneo mariae donee penitus solvatur arsenicum. Caveas 
autem ne aquae vel guttula evaporetur; quae non statim, solution! Anita, 
reponatur. Per chartam deinde cola. 
Dosis a guttis quindecim ad quadraginta, ter in die, inter febrium in- 
termittentium paroxysmos, in menthae vulgaris infusi uncies duabus. 
(Note) The remainder of the letter refers to the dosage, symptoms and 
diagnosis, of cases observed). 
(Signed) (p. 123) Your faithful fried and fervent; 
Thomas Arnold. 
West-Cotes 
March 27th, 1786. 
A Letter from W. Withering. M. D. F. R. 8. (p. 12i3) 
Birmingham, May 21st. 1786. 
Dear Sir: 
The Arsenical Solution was first used here in the Autumn of the year 
1783, at which time Intermittents of various denominations were very 
prevalent both in this and in adjourning Counties. The general use of 
Tasteless Ague and Fever Drops of this period made me solicitous to know 
the composition of that medicine, and I was informed it was made from 
the Ore of Coblat; but as it did. not answer the usual tests for that Semi- 
