24 SCIENTIFIC CATALOGUE. 



The object of this work is to supply students and field-botanists with a 



fuller account of the Plants of the British Islands than the manuals 



hitherto in use aim at giving. The Ordinal, Generic, and Specific 



characters have been re-written, and are to a great extent original, 



and drawn from living or dried specimens , or both. " Cannot fail to 



perfectly fulfil the purpose for which it is intended.' 1 '' Land and 



Water. ' ' Containing the fullest and most accurate manual of the 



kind that has yet appeared.' 1 ' 1 - Pall Mall Gazette. 



Huxley (Professor). LAY SERMONS, ADDRESSES, 

 AND REVIEWS. By T. H. HUXLEY, LL.D., F.R.S. New 



and Cheaper Edition. Crown Svo. 'js. 



Fourteen Discourses on the following subjects: (i) On the Advisable- 

 ness of Improving Natural Knowledge: (2) Emancipation 

 Black and White: (3) A Liberal Education, and where to find 

 it: (4) Scientific Education : (5) On the Educational Value of 

 the Natural History Sciences: (6) On the Study of Zoology: 

 (7) On the Physical Basis of Life: (8) 77/6' Scientific Aspects of 

 Positivism: (9) On a Piece of Chalk: (10) Geological Contem- 

 poraneity and Persistent Types of Life : ( 1 1 ) Geological Reform : 

 (12) The Origin of Species : (13) Criticisms on the "Origin of 

 Species:" (14) On Descartes' " Discottrse touching the Method of 

 using One's Reason rightly and of seeking Scientific Truth." The 

 momentous influence exercised by Mr. Huxley's writings on physical, 

 mental, and social science is universally acknowledged ; his works 

 must be studied by all who would comprehend the various drifts of 

 modern thought. 



ESSAYS SELECTED FROM LAY SERMONS, ADDRESSES, 

 AND REVIEWS. Crown Svo. \s. 



This volume includes Numbers I, 3, 4, 7, 8, and 14, of the above. 



LESSONS IN ELEMENTARY PHYSIOLOGY. With numerous 

 Illustrations. Fourteenth Thousand. iSmo. cloth, ^s. 6d. 



This book describes and explains, in a series of graduated lessons, the 

 principles of Jin/nan Physiology, or the Structure and Functions 

 of the Human Body. The first lesson supplies a general view of 

 the subject. This is folloived by sections on the Vascular or Venous 

 System, and the Circulation ; the Blood and the Lymph ; Respira- 



