SCIENTIFIC CATALOGUE. 



Kelland and Tait. AN INTRODUCTION TO QUATER- 

 NIONS. With numerous Examples. By P. KELLAND, M.A., 

 F.R.S., and P. G. TAIT, M.A., Professors in the department of 

 Mathematics in the University of Edinburgh. Crown 8vo. 75. 6d. 



Kempe. HOW TO DRAW A STRAIGHT LINE. A Lecture 



on Linkages. By A. B. KEMPE, B. A. Illustrated. Crown 8vo. is.dd. 



Merriman. ELEMENTS OF THE METHOD OF LEAST 

 SQUARES. By MANSFIELD MERRIMAN, Professor of Civil and 

 Mechanical Engineering, Lehigh Univer.-ity, Bethlehem, Penn., 

 U.S.A. Crown 8vo. "js. 6d. 



Morgan. A COLLECTION OF PROBLEMS AND EXAM- 

 PLES IN MATHEMATICS. With Answers. By H. A. 

 MORGAN, M. A., Sadlerian and Mathematical Lecturer of Jesus 

 College, Cambridge. Crown 8vo. cloth. 6s. 6d. 



Newton's Principia. 4to. cloth. 31*. 6<f. 



ft is a sufficient guarantee of the reliability of this complete edition of 

 Newtori 's Principia that it has been printed for and under the care 

 of Professor Sir William Thomson and Professor Blackburn, of 

 Glasgow University. 



Parkinson. A TREATISE ON OPTICS. By S. PARKIN- 

 SON, D.D., F.R.S., Fellow and Tutor of St. John's College, 

 Cambridge. Third Edition, revised and enlarged. Crown 8vo. 

 cloth. loj. 6d. 



Phear. ELEMENTARY HYDROSTATICS. With Numerous 

 Examples. ByJ. B. PHEAR, M.A., Fellow and late Assistant Tutor 

 of Clare Coll. Cambridge. Fourth Edition. Cr. 8vo. cloth. 5.5-. 6d. 



Pirrie. LESSONS ON RIGID DYNAMICS. By the Rev. G. 

 PIRRIE, M. A., Fellow and Tutor of Queen's College, Cambridge. 

 Crown 8vo. 6s. 



Puckle. AN ELEMENTARY TREATISE ON CONIC SEC- 

 TIONS AND ALGEBRAIC GEOMETRY. With numerous 

 Examples and Hints for their Solution. By G. HALE PUCKLE, 

 M.A. Fouth Edition, enlarged. Crown 8vo. "js. 6d. 



Rayleigh. THE THEORY OF SOUND. By LORD RAYLEIGH, 

 F.R.S., formerly Fellow of Trinity College, Cambridge. 8vo. 

 Vol. 1. I2J. 6d. ; Vol. II. I2s. 6d. [Vol. III. in preparation. 



Reuleaux. THE KINEMATICS OF MACHINERY. Out- 

 lines of a Theory of Machines. By Professor F. REULEAUX. 

 Translated and edited by A. B. W. KENNEDY, C.E., Professor of 

 Civil and Mechanical Engineering, University College, London. 

 With 450 Illustrations. Royal 8vo. 2os. 



