JUST OUT. Bs. net. 



The Heredity of Acquired 

 Characters in Plants. 



An Aspect of the True Darwinism based on Personal Observations and Experiments. 



By the Rev. Prof. GEORGE HENSLOW. 



With Illustrativ 



The object of this work is to substantiate Darwin's alternative explanation of 

 Evolution, which replaces his theory of " The Origin of Species by means of 

 Natural Selection." He maintained that new forms arose by the "direct action 

 of changed conditions of life," and that, if these persisted for several generations, 

 the variations produced by them would be hereditary. The Author herein describes 

 experiments and observations which entirely confirm this later view of Darwin, 

 held by him in 1876. It is precisely the same as is that of all plant-ecologists 

 of to-day. 



JOHN MURRAY, Albemarle Street, W. 



Demy Svo y 12s> 6d« net. 

 With numerous Diagrams and Illustrations. 



MICROSCOPY: 



The Construction, Theory, and 

 Use of the Microscope. 



By EDMUND J. SPITTA, F.R.A.S., F.R.M.S., etc., etc. 



NATURE says:- 



" From this point of view, let us hasten to urge every student of the microscope who wishes to 

 gain a thorough understanding of its principles and possibilities and its defects, and every user of 

 the instrument who desire3 a work of reference to which he may turn for an explanation of some 

 unexplained optical phenomenon, or for particulars of up-to-date apparatus, to procure a copy of 

 Mr. Spitta'r book without delay. It is a leisurely book— an unfriendly critic might even call it diffuse 

 — but there is scarcely a chapter which will not repay careful reading; and when one comes to the 

 chapter on ' Testing Objectives,' one can but feel grateful to Mr. Spitta for his admirable treatment of 

 a difficult subject." 



JOHN MURRAY, Albemarle Street, W. 



Scale of Charges for Advertising in " Science Progress." 



1 Insertion. 4 Insertions. 



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( xv ) 



