C 748 ] 
ment improved; where I have obviated all the Diffi- 
culties that hitherto attended it; and made it to 
anfwer all the Objections that have been raifed againft 
it; and demonftrate that it is fubfervient to all Parts 
of the Art, for which fuch Inftruments are defigned ; 
1 may in lbme meafure feem to be juftified. 
The Inftrumen tis (what has been hitherto called) 
the ‘Plain Table. One of the chief Objections 
againft it was, the Difficulty in fhifting of Papers; 
for you were almoft neceflitated, when you were at 
work on a Sheet in the Table, to put in all the Work 
that is to be contained thereon, (becaufe it is very 
impracticable to put it on the Table in the fame 
precife Pofition again) and this although it were with 
the utmoft Inconveniency, in purfuing fome grand 
Station, on circumfcribing the Whole. This is in- 
tirely obviated; and I have remedied all the other 
Objections againft it (as may be feen hereafter), in 
a very ftmple and eafy Manner, which I contrived in 
the Year 1721. for making a correct Map of the 
County of Warwick y by which, with good Succefs 
and Expedition, I completed and publifhed the fame 
in the Year 1728. and call the Inftrument The 
Plotting-Table. 
Gr T 7><h h- ! 739- Henry Brighton . 
A Defcription of the Plotting-Table. 
¥ T is a plain fmooth Board, about 18 Inches fquare, 
A and Three-quarters of an Inch thick, as Tab. I. 
fig. 1. slBCT), made of Mahogany , Walnut , 
Pear-tree , or Norway Oak , well clamped at the Ends, 
or 
