_
LIB
574
L 0 C
Description of, ii. 96.
Use of, ii. 96.
To adjust the level, ii. 96.
Of the spirit or air level, ii. 97.
Levelling, ii. 97.
Lever, or Leaver, ii. 97.
Various kinds of levers, and their particular properties,ii. 97.
Principles and laws of motion, ii. 97.
Composition and resolution of forces, ii. 98.
If any body, A, be moved by any impulse which wouldcause it to describe the right-line a b, uniformly in agiven time, and if the same body a, be moved byanother impulse which would cause it to describethe right-line a d, uniformly in an equal time ; thesetwo impulses acting at the same instant, would carrythe body through the diagonal A c of a parallelogramA b c d, ii. 98.
Given the tracts, intensities, and tendencies of two forcesmaking any angle with each other, to find a singleforce equivalent to them, ii. 98.
To resolve any force into two others in any given direc-tions which shall act against any point of the line ofdirection of the given force, ii. 98.
If any two forces keep a third in equilibrio, the direc-tion of the third has the same point of concourse, andis in the same plane with the other two, and all thethree forces are, to each other, as the sides and diago-nal of a parallelogram formed on their lines of direc-tion, ii. 98.
The lines of direction of three forces keeping each otherin equilibrio, and the intensity and tendency of one ofthem being given, to find the intensity and tendencyof the other two, ii. 99.
Given, the directions of four forces in the same plane,keeping a solid in equilibrio, and one of the intensi-ties, to find the intensities of the other three, ii. 99.
Given, the direction of five forces in one plane, keepinga solid in equilibrio, and the intensities and tenden-cies of two of them, to find the intensities and ten-dencies of the rest, ii. 99.
If there be two straight lines, A b, b c, making anyangle, abc, with each other, and if two forcesequal and opposite in the directions a x, c Y, in thesame straight line, be applied, and three others in thedirections AW, b z, C J, then if the whole be inequilibrio, the directions z b, a w, c j, will have thesame point of concourse, or otherwise they will beparallel, ii. 99. v
If three forces acting against the same point be inequilibrio with each other, and if any point F, takenin the line of direction of any one of the forces, theother two forces are to each other, reciprocally, as thedistance of their lines of direction from that point,ii. 100.
If a solid a b c, be supported by three forces in the linesof direction zb, a w, CJ, these three lines will havethe same point of concourse, or be parallel to eachother, ii. 100.
If a solid be in equilibrio by three forces, and if anypoint be taken in the line of direction of any one ofthem ; the products of each of the other two by thedistance of their respective lines of direction from thatpoint will be equal, ii. 100.
Lever Boards, ii. 10!.
Library, ii. 101.
Origin of, ii. 101.
Of early libraries, ii. 101.
Libraries of London , ii. 101.
Table of different sizes of paper, ii. 101.
Use of, ii. 102.
Form of, ii. 102.
The Pharos of Alexandria, ii. 102.
Eddystone Lighthouse , i. 328.
Description of Bell-rock lighthouse, ii. 102.
Table showing the relative dimensions of Eddystone and Bell-rock lighthouses, ii. 102.
Construction of, ii. 102.
Watt’s invention of the jib and counterpoise cranes,ii. 103.
Of the Skerrymore Rock lighthouse, ii. 104.
Of the screw-pile, ii. 104.
Mode of constructing Point of Air lighthouse, ii. 105.Mr. C. Fox’s method of forming foundations for piers orbridges, ii. 105.
On Mr. Bush’s light of all nations, ii. 106.
On iron lighthouses, ii. 106.
On the illumination of lighthouses, ii. 106.
Examples of ditto, ii. 107.
Like Arcs, ii. 107.
Like Figures, ii. 107.
Like Solids, ii. 107.
Cement, i. 128.
Lime Kiln, ii. 107.
Lime, quick, ii. 107.
Line, ii. 107.
“ Equinoctial, ii. 107.
“ Geometrical, ii. 107.
“ Horary, or Hour Lines, ii. 108.
“ Horizontal, ii. 108.
“ Vertical, ii. 108.
“ Visual, ii. 108.
“ of Direction, ii. 108.
“ of Light, ii. 108.
“ of Measures, ii. 108.
“ of Shade, ii. 108.
“ of Station, ii. 108.
Lines, Division or Gradation of, ' ii. 108.
“ of the Proportional Compass, ii. 108.
“ of the Plain Scale, ii. 108.
“ of the Sector, ii. 108.
Linear Perspective, ii. 108.
Lining, ii. 108.
“ of a Wall, ii. 108.
Lining-out Stuff, ii. 108.
“ of a Sash Frame, ii. 108.
Lintel, ii. 108.
Lintels, or Fir-in-Bond , ii. 108.
List, or Listels, ii. 108.
Fillet, i. 414.
Listing, ii. 108.
Lobby, ii. 108.
Lock, ii. 108.
Description of, ii. 108.
Lock, or Weir, ii. 109.
“ Paddles, ii. 109.
“ Sills, ii. 109.
“ Weirs, or Paddle Weirs, ii- 109.
Locker, ii. 109.