Robert IIarpvvicke, 192, Piccadilly, w. 



Third Edition, much enlarged, with full description of the various 

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Half-hours with the Microscope. 



By Edwin Laxkester, M.D. Illustrated by 250 Drawings 

 from Nature by Tuften West. 



CONTENTS. 

 Half-an-hour on Structure. Half-an-hour at the Pond-side. 



Half-an-hour in the Garden. Half-an-hour at the Seaside. 



Half-an-hour in the Country. | Half-an-hour In- doors. 



Appendix. — The Preparation and Mounting of Objects. 



"This wonderful anatomy of sight divides clearly one blood corpuscle from 

 another ; marks distinction from the blood of a fowl and that of a frog ; separates 

 the filaments of the finest plants ; delineates the bearded hair of the sowthistle ; 

 makes a picture of vine or potato blight ; pries into the hollow cells of the passion 

 flower ; and searches the warm depths of the poppy. Then it dignifies into isolation 

 the minutest hair on the ear of a mouse, the mouth of a flea, the fang of a spider, 

 the eye of a fly, the smallest particle that goes to make up a drift of swandown. 

 Elementary Manuals of Science are seldom so well adapted to please, no less than 

 to teach. The compiler of the volume has this conspicuous merit, that he deals 

 with wonders, and never exaggerates them." — Atheneeum. 



" The beautiful little volume before us cannot be otherwise than welcome. It is 

 in fact, a very complete manual for the amateur microscopist The ' Half- 

 Hours' are filled with clear and agreeable descriptions, whilst eight plates, executed 

 with the most beautiful minuteness and sharpness, exhibit no less than 250 objects 

 with the utmost attainable distinctness." — Critic. 



" It is a most interesting study only to observe how Nature in her smallest 

 productions, developes the figures as well as the organization by which the functions 

 of the largest animals and vegetable creations are performed. But the botanist, the 

 physiologist, the zoologist, the anatomist, the geologist, and the chemist, may derive 

 assistance from this book in accomplishing their several pursuits, and exploring the 

 secret springs of the operations which they manipulate." — Morning Post. 



" Contains some good advice as to the choice of specimens for examination, with a 

 view of gaining an insight into the structure of plants and animals, and of turning 

 a pleasant amusement into an interesting study. The collected specimens of natu- 

 ral objects are carefully described and illustrated by plates on a magnified scale. 

 To such as are beginning the study, we can recommend this manual as a useful 

 guide." — Economist. 



Demy Svo. price Gd. 



The Mechanics of the Heavens ; 



And the new Theories of the Sun's Electro-Magnetic and Repulsive 

 hitiuence : a Paper submitted to the British Association, at Cam- 

 bridge, with Notes and Postscript. By JaTvies Reddie, Author of 

 Vis Inertias; or, Fallacies affecting Science. 



Demy 8vo. 



n Atmospheric Electricity. 



By Reuben Phillip.-. 



