_A._ The Kingdom of Heaven is the central feature of practical Christianity. It represents a harmonious condition in which the Divine Will is perfectly obeyed; it signifies the highest state of existence, both individual and social, which we can conceive. Our whole effort should, directly or indirectly, make ready its way,—in our hearts, in our lives, and in the lives of others. It is the ideal state of society towards which Reformers are striving; it is the ideal of conscious existence towards which Saints aim. ------------------------------------------------------------------------ _Printed by_ MORRISON & GIBB LIMITED _Edinburgh_ ------------------------------------------------------------------------ Works by Sir Oliver Lodge ELEMENTARY MECHANICS      A text-book for Schools and Matriculation Candidates.            (Chambers.)   4s. 6d.   Net price, 3s. 5d. MODERN VIEWS OF ELECTRICITY      A well-known exposition of fundamental electrical principles.            New Edition, 1907.        (Macmillan.) 6s. LIGHTNING CONDUCTORS AND LIGHTNING GUARDS      A technical treatise on electric waves and discharges generally,    for Architects, Electrical Engineers, and Physicists. 1892.            (Whittaker & Co.) 15s. Net price, 11s. 3d. SIGNALLING THROUGH SPACE WITHOUT WIRES      First published in 1894 under the title “The Work of Hertz    and his Successors”; being a pioneer treatise on what has    become Wireless Telegraphy.    (Electrician Co.) 5s. net. PIONEERS OF SCIENCE      A course of popular lectures on Astronomical biography,    being sketches of the lives of the famous Astronomers and    their work, with numerous illustrations.                     (Macmillan.) 6s. Net price, 4s. 6d. SCHOOL TEACHING AND SCHOOL REFORM      A course of lectures delivered in Birmingham to Teachers.        1905. (Williams & Norgate.) 3s. Net price, 2s. 3d. EASY MATHEMATICS; CHIEFLY ARITHMETIC      Being a collection of hints to teachers, parents, self-taught    students, and adults, and containing a summary or indication    of most things in Elementary Mathematics useful to be  known.        1905.  (Macmillan.)   4s. 6d.   Net price, 3s. 5d. LIFE AND MATTER      A discussion of the scientific foundations of religion; being    an answer to Haeckel, and a speculation concerning the    meaning of Life. 1905. (Williams & Norgate.) 2s. 6d. net. MODERN VIEWS ON MATTER      Being the Romanes Lecture to the University of Oxford,    delivered in 1903, on the new discoveries in electricity in    connection with Radium and other such phenomena. A    pamphlet. (Clarendon Press.) (_Third Edition_) 1s. net. ELECTRONS, or the nature and properties of Negative Electricity.      A treatise on the most recent discoveries in the pure science    of Electricity. 1906. (George Bell & Sons.) 6s. net.