524 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
MICROSCOPY. 
Handbook of Microscopy.* — It would be almost impossible to put 
into a smaller compass the instructions needed by beginners in Micro- 
scopy than we find them to be presented in the pages of this book. 
But efficiency has not been sacrificed to brevity. The field covered is 
greatly narrowed by the wise omission from so purely elementary a 
treatise of the history and evolution of the Microscope, and of all 
attempts to epitomize the optical principles on which the instrument is 
built. The book introduces the amateur to his Microscope in a simple 
form, and explains competently, but in few words, the nature and use of 
apparatus. The plain and at the same time very practical and modern 
instructions given (pp. 50-6) on centering and illuminating with substage 
condenser will be welcome to many a tyro, and will prevent much 
needless waste of time. If the portion of this small volume devoted 
to the nature and use of the instrument be read with care by any one 
of ordinary intelligence, the initial work involved in the use of the 
Microscope will be done with far less trouble and disappointment than 
is usually the case. 
Nor is the feature of absolute utility a whit less lost sight of by 
Mr. Cole in the second part of the volume. Every line has its value, 
and he will have but little ingenuity and perseverance who will work 
honestly with this book before him and not succeed in making fair 
microscopic preparations and mounts in a short time. 
We cannot unconditionally subscribe to all that is laid down in this 
book ; but the divergencies have no great moment in anything apper- 
taining to the work of the beginner ; and even when we differ, and our 
differences are carried over to higher power work, we feel assured that 
the judgment of the authors is a judgment and not a mere opinion, and 
is therefore deserving of respect. 
This book will have the success it deserves. 
a. Instruments, Accessories, &c.f 
(1) Stands. 
Reichert’s Travelling Microscope.^ — In this Microscope, shown in 
fig. 60, the coarse-adjustment is by sliding in a socket, and the fine by a 
micrometer screw. It is very solidly built, can be put together very 
easily and occupies a very small space. It is provided with diaphragm 
and mirror, plane and concave, 
* 4 Modern Microscopy. A handbook for beginners, in two parts. 1. The 
Microscope, with instructions for its use by M. I. Cross. 2. Microscopical Objects: 
bow prepared and mounted, by Martin J. Cole.’ Balliere, Tindall, & Cox, London, 
1893. 
f This subdivision contains (1) Stands; (2) Eye-pieces and Objectives; (3) Illu- 
minating and other Apparatus; (4) Photomicrography; (5) Microscopical Optics 
and Manipulation; (6) Miscellaneous. 
% Reichert’s Catalogue No. 18 (!ow2). 
