+g 
rf ' 
_ 
PRELIMINARY 13 
14, Addition of Vectors.—A number of vectors, P, Q, R, and 8, 
shown to the left in Fig. 13, are added 
____ together as follows: Draw AB parallel and 
ual to P, BC parallel and equal to Q, 
CD parallel and equal to R, and DE parallel 
and equal to §, then the vector AE equal to 
T is the sum of the vectors P, Q, R, and 8. 
The sum will be the same whatever be the 
order in which the vectors are taken in per- . 
forming the addition. The vector T is also wig Te 
called the resultant vector. The polygon ABCDEA is called a vector 
ygon. 
15. Bibliography.—The following list gives the titles, authors, 
publishers, and published prices of some of the more important books 
on applied mechanics and its subdivisions :— 
GENERAL 
Applied Mechanics, Rankine. Griffin, London. 12s. 6d. 
Applied Mechanics. Cotterill. Macmillan, London. 18s. 
Mechanics of Engineering. Church. Wiley, New York. 25s. 6d. 
Mechanics Applied to Engineering. Goodman. Longmans, London. 9s. 
Applied Mechanics, Lanza. Wiley, New York. 31s. 6d. 
Applied Meehanics. Alexander and Thomson. Macmillan, London. 21s, 
Applied Mechanics. Perry. Cassell, London. 7s. 6d. 
_ Applied Mechanics and Mechanical Engineering (5 vols.). Jamieson. Griffin, 
London, 28s. 6d. 
Mechanical Engineering. Lineham. Chapman & Hall, London. 12s. 6d. 
Experimental Engineering. Carpenter. Wiley, New York. 25s. 6d. 
Experimental Mechanics. Ball. Macmillan, London. 6s. 
Dynamics of Rotation. Worthington. Longmans, London. 4s, 6d. 
MATERIALS AND STRUCTURES 
Testing Materials (2vols.). Martensand Henning. Wiley, New York. 31s. 6d. 
Mechanics of Materials. Merriman. Wiley, New York. 2ls, 
i Theory Structures and Strength of Materials. Bovey. Wiley, New York. 
3 
s. 6d, 
Testing of Materials. Unwin. Longmans, London. 16s, 
The of Materials, Ewing. Cambridge University Press. 12s, 
Strength of Materials. Morley. Longmans, London. 7s. 6d. 
prod and Resistance of Materials. Burr. Wiley, New York. 31s, 6d, 
Materials of Construction. Johnson. Wiley, New York. 25s. 
Materials of Engineering (3 vols.). Thurston, Wiley, New York. 34s. 
A History of the Theory of Elasticity and of the Strength of Materials, Tod- 
hunter and Pearson. Cambridge University Press. 55s. 
Strength as Elasticity of Structural Members. Woods. Arnold, London. 
10s. 6d. 
Testing and Strength of Materials. Popplewell. The Scientific Publishing 
Co., Manchester. 10s. 6d. 
Notes on Construction in Mild Steel. H. Fidler. Longmans, London. 16s. 
Bridge Construction. Claxton Fidler. Griffin, London. 30s. 
Design of Structures. Anglin. Griffin, London. 16s. 
Engineering Construction. Warren. Longmans, London. 16s. 
Theory and Design of Structures. Andrews. Chapman & Hall, London. 9s. 
Roofs and Bridges (4 parts). Merriman and Jacoby. Wiley, New York. 42s. 
Stresses in Bridges and Roof Trusses. Burr. Wiley, New York. lds. 
Design of Plate Girders. Lilly, Chapman & Hall, London. 7s. 6d. 
Constructional Steclwork. Farnsworth, Griffin, London. 10s, 6d- 
