ESSAY-REVIEWS 687 



At puberty, coincident with the dawn of the generative function, there is a 

 complete mental revolution ; there is a vague longing and desire, accompanied by 

 an attraction for the opposite sex ; it is insistent and so strong that " Love is 

 blind." Indeed, this fact explains what Maudsley in his Mental Physiology 

 surmised long ago before the great importance of the internal secretions were 

 known. " The passion of love has its source in the unconscious life, and can no 

 more be explained in consciousness than the feelings of hunger or thirst ; it makes 

 an elective affinity of the organism which oftentimes enslaves consciousness and 

 overpowers volition." 



But if" Love is blind " it is also true that " Love adds a precious seeing power 

 to the eye," which is apparently a paradox ; but the latter is not a biological anti- 

 thesis to the former, for the latter implies a perceptual instinct of sexual attraction 

 necessary to materialise the bio-chemical stimulus and effect preservation of the 

 species. This perceptual instinct is shown by the fact that the language of love 

 is universal ; it cannot be concealed, it appeals by mute eloquence in expression, 

 gesture, attitude, and eye in a manner more enticing and forcible than by any 

 spoken language. 



Much more might be said regarding the study of the Mind through Physiology 

 and Pathology, which is applied Physiology, when injury or disease performs an 

 experiment on the human being ; but it must not be forgotten, as it is so apt to be 

 both by physiologists and psychologists, that the divisions in all knowledge are 

 artificial ; that they should be accepted and used, as Bacon says, rather " for lines 

 to mark and distinguish than sections to divide and separate, in order that solution 

 of continuity in sciences may always be avoided." 



PLAGIARISM IN SCIENCE, by the Editor : on Essays on the Life 

 and Work of Newton, by Augustus de Morgan, edited, with Notes 

 and Appendices, by Philip E. B. Jourdain, M.A. [Pp. xiii+198.] 

 (London: The Open Court Publishing Co., 1914, price 5s. net.) 



An extremely interesting little book, giving the views of that distinguished 

 mathematician and clever writer, Augustus de Morgan, on certain points in 

 the life of Newton, and especially on the famous Newton-Leibniz controversy. 

 Mr. Jourdain's editing is excellent, and his footnotes supply much information 

 which is lacking in De Morgan's essays. The part of the work which will chiefly 

 interest the reader to-day is that which deals with De Morgan's opinions on the 

 controversy just mentioned. 



It is often stated very unwisely that questions of priority have no importance 

 for science. This is, in fact, just the opposite of the truth. Men of science, 

 as is well known, derive little or no pecuniary benefit from their studies ; but 

 they, like other men, do at least like to obtain the credit which their work is 

 likely to give them among their fellows. This is only what is to be expected ; 

 and, certainly, no man of science who has spent, let us say, years over making 

 an important discovery likes to see that discovery attributed to some one else 

 who has perhaps jumped into the arena just at the moment of victory, and who 

 then claims, for such small help, to share the laurels with the victor. It is not to 

 the benefit of science that miscarriages of credit should be easily allowed — and 

 yet they often occur. Nothing is more easy than scientific plagiarism. A man 

 has been working, let us say, for a long time at a special theme, and has nearly 

 brought it to completion. He speaks of his researches and mentions his con- 



