S2Q Directions for constructing, 8£c. 
In consequence of these proofs of its successful effects, 
and these encomiums from the learned and respectable 
bodies who are so well enabled to decide regarding its 
merits, a number of applications have of late been ad- 
dressed to the inventor, soliciting him to describe and de- 
lineate the machine, so as it might be introduced into 
general use in the various quarters of the kingdom. 
To save time in complying with these requests, he 
adopted the method of printing and circulating these 
plates, accompanied with a description, which will clear- 
ly demonstrate, at how very small an expense, and with 
how very little mechanical art, the elastic frame can be 
constructed ; for, in fact, there is no village in Britain, 
in which an ordinary smith and carpenter reside, where 
it may not be easily made. 
Under these circumstances, the inventor feels it a duty 
he owes to his country, and to those suffering bodily dis- 
tress, to give it all the publicity in his power ; with which 
view, and with the most ardent wishes for its continuing 
to prove beneficial, in mitigating the distresses of such 
as may require its aid, this account is submitted to the 
public. 
Gay field Place, 
17th Sept. 1807. 
Indelible Ink, 
Lunar Caustic, Ji : weak solution of Gails, 52 . The cloth is to 
be first wetted with a solution of one ounce of salt of Tartar dissolved 
in §i fs of water, and must be quite dry before using the ink. 
Month , Mag. No. 1 10. 
ANOTHER. 
Dissolve 4 drachms of Lunar Caustic in 4 oz. of rain or river water. 
To the clear solution add 60 drops of an infusion of 2 drachms of pow- 
dered galls in a gill of boiling water. 
The cloth is to be previously wetted with a solution of 1 ounce of 
pearl ash in 4 oz. of water, and suffered to dry thoroughly. 
Philad . Med . Mus . Vol. 1 
