SOUND— AN OLD PROBLEM— BUILDING 



Sound. An elementary text-hook for Schools and Colleges. By J. JV. Capstick, 



M.A. [Camh.\ D.Sc. {Fict.), Fellow of Trinity College, Cambridge. 



Crown Svo. pp. viii + 296. Price 45. 6it. 



This new volume in the Cambridge Physical Series is primarily intended 

 for students of Physics, but enough has been included of Helmholtz's Theory 

 of Consonance to make it adequate also for students of Music. 



The author, realising that many of the most ordinary phenomena cannot 

 be explained adequately without the use of mathematics of a somewhat 

 advanced type, has aimed at making the least possible use of mathematical 

 methods, in order that the reader may not be led to evade the mental effort 

 required for the appreciation of the physical connexion between the pheno- 

 mena described. 



The chapter-headings are as follows: Nature of Sound — Elasticity and 

 Vibrations — Transverse Waves — Longitudinal Waves — Velocity of Longi- 

 tudinal Waves — Reflection and Refraction. Doppler's Principle — Inter- 

 ference. Beats. Combination Tones — Resonance and Forced Vibrations 

 — Quality of Musical Notes — Organ Pipes — Rods. Plates. Bells — 

 Acoustical Measurements — The Phonograph, Microphone and Telephone 

 — Consonance — Definition of Intervals. Scales. Temperament — Musical 

 Instruments. 



A large number of questions taken from Examination Papers set in various 

 Universities are included in the book, together with answers to them. 



"Squaring ihe Circle." A History of the Problem. By E. JV. Hohson, 

 Sc.D., LL.D., F.R.S., Sadleirian Professor of Pure Mathematics, and 

 Fellow of Christ'' s College, in the University of Cambridge. 

 Demy Svo. pp. viii + 5S. Price y. net. 



"The problem which is known to mathematicians as the quadrature 

 of the circle," says The Morning Post, "has long occupied the attention 



of mankind Professor Hobson deals in detail in these lectures with the 



history of the problem and its solution... and has some amusing comments 

 to make on the circle-squarer. Every scientific society, he says, still re- 

 ceives from time to time communications from the circle-squarer and the 

 trisector of angles, who often make amusing attempts to disguise the real 



character of their essays Professor Hobson explains that the popularity is 



due partly to its comparative obviousness, partly to its 'proverbial' celebrity 

 and partly to an exaggerated notion of the gain which would accrue to 

 mankind by its solution." 



Architectural and Building Construction Plates, Part I. Thirty draivings 

 covering an elementary course for architectural and building students. 

 By W. R. Jaggard,' A.R.I.B.A. 

 Size 20" X 13". Price 6s. net in portfolio, or in 6 separate parts, u. ^d. net each. 

 Also published in book form for the convenience of libraries at 6s. net. 



"A very useful series of drawings Teachers will find the plates especially useful... 



and young architectural and building students will, we are sure, fully appreciate the 

 series." — Tbe BuilJiiig Neavs 



