348 Carpenter on the Microscope. 



my doubts, and said, ' You believe you are at home, and 

 perhaps you are at work in the laboratory •/ but this doubt 

 passed off like lightning, as a thousand reasons occurred to 

 convince me that I was really at home, and nowhere else, for I 

 could get out of bed and walk — which I did ; I could go back 

 to bed — which I did also, having first examined my clothes, 

 looked at the two letters on the floor, and noticed that the door 

 was shut and the key outside. As soon as I got into bed the 

 second time the clothes again removed themselves to a distance, 

 and the same agreeable atmosphere surrounded me once more. 



" This action lasted about four hours, and towards its close 

 ideas succeeded with less rapidity, the distances diminished, 

 and the bed-clothes respectfully approached me, the nervous 

 movement disappeared, and all things gradually assumed their 

 natural aspect, except that my lips were less moist than usual.'" 



CARPENTER ON THE MICROSCOPE. 



The appearance of a third edition of Dr. Carpenter's well known 

 and valuable work* is an important event in the annals of 

 microscopic literature, in which it still occupies a foremost 

 place. It may be confidently stated that, as a scientific intro- 

 duction to the use of the microscope as an instrument of re- 

 search, and to the natural history and physiology of a very wide 

 range of objects, no work equal to it has ever been produced. 

 The present edition, by the introduction of much new matter, 

 the revision and correction of many passages written in a less 

 advanced stage of knowledge, and numerous additions to the 

 illustrations, is brought very closely up to the requirements of 

 the time. The first portion of The Microscope and its Revela- 

 tions, as in former editions, is devoted to an explanation of the 

 optical and mechanical arrangements of various kinds of in- 

 struments ; but while the great makers, whose productions 

 cannot be too highly praised, meet with ample justice, there is 

 a deficiency of information concerning the merits of their 

 imitators, whose productions, if less perfect, may be obtained afc 

 a largely diminished cost. The comparative merits of first and 

 second class object-glasses is a very important question for the 

 student. If rich, he would be unwise to grudge the price of 

 the finest that are produced ; but if his means are moderate, it 

 is important that he should have some idea of the results 



* The Microscope and its Revelations, by Gr. B. Carpenter, M.D., F.R.S., 



P.G.S., F.L.S., Registrar of the University of London, formerly President of the 



Microscopical Society of London, etc. Third Edition. Illustrated by ten plates, 

 and nearly 400 wood engravings. Churchill. 



