^c8 Major-General Roy's Account of the 



three feet froai each other ; and being braced diagonally, arc 

 mortolfed at top into circles of the iame fort of wood. Over 

 this circle, a fqiiarc table of about \\\ inches is fixed, com- 

 pofed of oak, and mahogany at top ; but both taken together 

 do not exceed i| inch in thlcknefs. 



The nature of the moveable ftands, whereof there were at 

 lafl: no fewer than feventeen provided, will be comprehended 

 from the reprefentations of them towards the right-hand in 

 tab. XVIII. and XIX. Their general con{lru<5lion, in what 

 regards the part of them which is fixed, dlffc:rs not from that 

 of the others, excepting that they were of different heights, 

 from two iztt to about two feet eight inches, fo as better to 

 fuit the irregularities of the ground v^^here it mjght be necef- 

 fary to place them In the middle of each of thefe, an hexa- 

 gonal wooden pipe defcends, from the top to within two or 

 three inches of the bottom, where it is joined by a brace 

 reaching from each leg. This pipe receives the common 

 cheefe prefs wooden fcrew (having three fides fcrewed and 

 three plane], to the top of which the fqiiare table is attached. 

 It is embraced by the circular nut, or winch with four handles, 

 whereby the table is elevated or deprelTed at pleafure ; and being 

 brought to its proper height, is there made perfedly faft by 

 means of the flat-headed iron fcrew, which pafling through 

 one of the legs, prefles an iron plate, fixed in the infide of the 

 pipe, againft one of the plane fides of the fcrew. 



In defcrlbing the deal rods, there has already been occafion to 

 make mention of the vertical and horizontal clamps, whereby the 

 crofs-feet are faftened to the table on the top of the fland. The na- 

 ture of thefe tables will be beft underftood by confulting the two 

 plans of them towards the right hand in tab. XVIII. ; whereof . 

 one reprefents the two grooves fitted for the alternate reception 

 2 of 



