[ 85 ] 
do myfelf the Honour to prefent it to this Society. 
And, in order to make it better underfiood, I fub- 
join a Drawing of the Prefs I ufe in its full Size ; fee 
Tab. I. Fig. 4. and have brought the whole Appa- 
ratus (the Expcnce whereof is not above four shil- 
lings) to fhew the Manner of employing it: I fhall be 
alfo ready to give farthetTnformation or Afllftance to 
any Gentleman of this Society, who may defire or 
Hand in need thereof. 
1 have likewife added to this Account, as Speci- 
mens, both the Pidure and the Relievo of that Medal 
of Gold, which this Society beflows yearly, in con- 
fequence of Sir Godfrey Copleys Benefadion, as the 
Rrremium of fome new Experiment, or ufeful Ob- 
fervation lately laid before them. By the way of 
Eancy, I have alfo placed with them the revcrfe Side 
of an Half crown, and of a Silver Medal that came 
to Hand, taken off in Leather ; and am ready to fhew 
great Numbers of other Specimens. 
And now. Gentlemen, to conclude, If I have in- 
truded on your Time too long, or faid too much in 
behalf of what has often afforded me much Pleafufe, 
and, 1 think, capable of doing the fame to others, I 
hope to obtain your Pardon 5 and am. 
Tour mojl obedient humble Servatit , 
London , A-pril 19. 1744. H. Baker. 
N. B. Inftead of the Water-Colours herein mentioned, I have lately made 
ufe of the Mixture (both Red and Black) which is ufually emph yed 
by the Rolling-Prefs Printers in working off Copper-Plates, with very 
good Effeft : but when this is ufed, after it has been wiped off with a 
linen Cloth, it is neceffary to clear it perfe&ly from the Ground of the 
wax Impreflion, by rubbing one of your Fingers on a Piece of Whiting, 
and paffing it two or three times over your Impreffion, in the fame 
manner as Copper-Plates are cleared. 
XIV. Oil 
