. An encyclopædia of gardening; . 1369. The adjusting Iwrizontal level (,fig 157.) is peculiarly useful in laying out roads,or regulating the slope of lawns or borders, as is also the following instrument. 1370. DalzieVs level. (Jig. 159.) This is an instrument of a very simple description, 159. lately invented, for ascertaining the relative elevation of unequal surfaces. It consists of awooden bar (a) with a foot at one end (6), and at the other another larger foot with a grooveand scale (c), to which the bar is connected by a screw and nut. In using this instru-ment, two points of different
. An encyclopædia of gardening; . 1369. The adjusting Iwrizontal level (,fig 157.) is peculiarly useful in laying out roads,or regulating the slope of lawns or borders, as is also the following instrument. 1370. DalzieVs level. (Jig. 159.) This is an instrument of a very simple description, 159. lately invented, for ascertaining the relative elevation of unequal surfaces. It consists of awooden bar (a) with a foot at one end (6), and at the other another larger foot with a grooveand scale (c), to which the bar is connected by a screw and nut. In using this instru-ment, two points of different altitude being chosen, the support of the bar (b) is to beplaced on the higher, and (c) the foot of the scale on the lower, while the position of both issecured by a slight turn of the thumb-screw. The barbeing brought parallel to the horizonwith the plummet (fZ), will indicate, that the upper part of the scale is to be advanced, orthe reverse, keeping its foot on the point of support, until some one of the graduationscoincides with, or is visibly parallel to the upper edge of the bar. The difference of alti-tude sought is seen in figures, without calculation. Any person that understands the useof a level will see a variety of levelling operations on a small scale that this implement isc
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Keywords: ., bookcentury1800, bookdecade18, booksubjectgardening, bookyear1826
