120 THE AMERICAN MONTHLY [Mar 
sion, chemical affinity, the solid, liquid and gaseous states 
of matter, latent heat, the transition from liquid to gas 
and the expansion of water by freezing. Energy he calls 
an entity and not a mode of motion, This book is worth 
the attention of every naturalist and philosopher. Curi- 
ously, he finds that atoms are not all of the same size or 
shape. We shall hear from Mr. Murray again with much 
satisfaction. He writes from Ottumwa, Iowa. The A. 
S. Barnes Co. Publishers. 
Key to Magnetic Healing.—A handbook for ministers, 
doctors, lawyers, teachers, students, business men, nurses, 
and others, by Professor J. H. Strasser, of the New Ulm 
Inst. of Magnetic Healing. This book comprises the his- 
tory of magnetic healing, the theories of vital magnetism, 
mental science, hypnotism and telepathy, and practice of 
magnetic healing. This book seeks to bring the subject 
down to common sense avoiding mystery, confusion, su- 
perstition. The fundamental principles of magnetic heal- 
ing are fully demonstrated. This book gives the reader 
entirely new and higher views about the workings of his 
own body and mind, and shows how to get well, and how 
to keep well. It gives the most advanced theory, and the 
correct practice of magnetic healing. Price $5.00 with a 
reduction to our subscribers equaling our subscription. 
MICROSCOPICAL QUERIES. 
A subscriber writes: ‘I have made several sections of 
coal, but have so far been unable to bleach them.” Please 
let us have your experience therein or abstract of any print 
ed instructions to which you have access. 
Is there anything I can use to thin the cedar oil without 
unduly altering its refractive index? I can, indeed, man- 
age with a Rousselet compressorium fitted with very thin 
cover-glass, but it is not always practicable to transfer a 
minute object from the slide 1¢t happens to be on. 
