REVIEWS. 
413 
Then, owing to the size of the maps, a stout kind of paper had to he used, 
in which steel pens and compasses worked (at least in my unpractised 
hands) most unpleasingly.” But for all this the author has produced a set 
of maps of the Heavens which are as excellent in mere details of printing 
as they are accurate and reliable in an astronomical sense. 
HYDROSTATICS AND SOUND.* 
rrilE author of this book tells us that it contains all that is required for 
J- the London University, and we are willing to believe him. At 
all events we can see that it is as much before other books of the kind 
as the London University examinations are in advance of most others. 
Assuredly, if this little work contains all that a student must know in 
respect to hydrostatics and sound, no very severe test exists at Burlington 
House ; for it must be confessed that it deals with only the elements of the 
two subjects, and that there is within — including questions — a space of about 
140 pp. of a duodecimo volume. But after all this does not appear so strange, 
if the reader will but remember that the book is written by one who is 
himself familiar enough with the London University examinations. He has 
cut from his pages all those useless accounts of appliances and valueless 
descriptions which so many of the old manuals are filled with. He has thus 
given himself room for the introduction of the really useful matter which 
fills his pages. In the manual he deals with the subjects of Hydrostatics 
and Sound clearly and concisely ; and as each chapter is followed by a table 
of questions to which the answers are given, and as the mode of replying to 
them is sufficiently explained in the text, we see no reason why the student 
should experience any difficulty in working through its pages. Its general 
“ get up ” is excellent, whether in regard to the type in which it is printed, 
or the excellent diagrams and figures which it contains. 
THE CHEMISTRY OF CREATION. f 
T HE little work which is now before us was written some years ago and was 
not published. This is a statement made in the preface by the author. 
We can only say in passing that we wish it had never been published : 
lstly, because it cannot convince the disciples of Gliddon ; and 2ndly, 
because, not doing so, it is obviously of no use ; unless, perhaps, it may do 
in America what it would not possibly do here — it may bring in something 
to the author. Such works are ineffective ; for, while they all start with 
SDme point or argument which would be denied to the author by his op- 
* 11 An Elementary Course of Hydrostatics and Sound,” &c. By Richard 
Wormell, M.A., B.Sc. London : Groombridge. 1870. 
t “ The Chemical History of the Six Days of Creation.” By John Pkin, 
C.E., editor of the “ Technologist.” New York : American News Company. 
1870. 
