i88i .] Analyses of Books. 161 
qualified to lay down any general hypothesis on the ancestry of 
the Metazoa. 
A separate memoir is devoted to the acquisition and loss of a 
food-yolk in Molluscan eggs. 
The English Universities and John Bunyan , and the 44 Encyclo- 
pedia Britannica ” and the Gipsies. By James Simson. 
New York: James Miller. Edinburgh: Maclachlan and 
Stewart. London : Bailliere, Tindall, and Co. 
The title of this little work seems to require some explanation. 
The author maintains that John Bunyan was a Gipsy, or at least 
of Gipsy origin, — a question possibly of interest to the literary 
world, but which does not in any way fall within our jurisdiction, 
— and he appeals to the Universities of England, and to all con- 
nected or who have been connected with them, to discuss this 
point. Mr. Simson then criticises an article on Gipsies in the 
44 Encyclopaedia Britannica,” from the pen of Mr. F. H. Groome. 
A passage which the author quotes from Lord Macaulay should 
not be passed over without solemn protest. Says the great Whig 
historian : — “ Though there were many clever men in England 
during the latter half of the seventeenth century, there were 
only two great creative minds. One of these minds produced 
the 4 Paradise Lost,’ the other the 4 Pilgrim’s Progress.’ ” The 
writer here very characteristically ignores a mind which produced 
the 44 Principia ” — of far greater value than the 44 Paradise Lost ” 
and the 44 Pilgrim’s Progress ” put together. 
The ethnological questions involved are from our point of view 
much more important. To us it seems unreasonable to expeCt 
social equality for a strange race which has obtruded itself un- 
invited into European countries, so long as it refuses to become 
merged in the great body of the people. A distinCl caste, if not 
a dominant aristocracy, must take the rank of Pariahs. To an 
absorption of the Gipsies we can see no objection. 
Popular Lectures on Scientific Subjects. By H. Helmholtz, 
Professor of Physics in the University of Berlin. Trans- 
lated by E. Atkinson, Ph.D., F.C.S. Second Series. 
London : Longmans and Co. 
The subjects of the Ledtures contained in this series are — 
44 In Memory of Gustav Magnus,” on the 44 Origin and Signifi- 
cance of Geometrical Axioms,” on the 44 Relation of Optics to 
