November 13, 1879] NATURE 3 



In Eighteen Monthly Parts. Price, 40 cents each. Subscription for the whole work, paid in advance, $6. 



THE APPLICATIONS OF PHYSICAL FORCES. 



BY 



am£d£e gtjillemin. 



Translated from thk French by 



:m::r,s. nsroi^i^i^isr lockyer, 



and Edited, with Additions and Notes, by 



J. NORMAN LOCKYER. 



With Four Coloured Plates and nearly Five Hundred Engravings. 



The issue of Guillemin's " Forces of Nature in monthly parts being now complete, the publishers propose to follow it up by a 

 similar issue of the companion work on " The Applications of Physical Forces." This important and valuable treatise, which gives in 

 popular form explanations of the various modes in which the " Forces " with which readers of the previous volume are now familiar, may 

 be applied to human use, will now therefore be brought for the first time within the reach of a public to whom in its original and costly 

 form it was inaccessible. The mere mention of a few of the subjects dealt with in the work is enough to show its eminent fitness to 

 supply the ever-increasing thirst for scientific information : e.g. The Pendulum, the Balance, Hydraulic Press, Artesian Wells, Pumps, 

 Pi • Engines, Air Pumps and Guns, Balloons, the Stethoscope, Bells, Drums, Stringed Instruments, Wind Instruments, the Organ, Mirrors, 

 Lighthouses, the Microscope, the Telescope, the Stereoscope, Photography, Heliography, Heating Apparatus, the Steam Engine, Steam 

 ition, the Locomotive, the Compass, Lightning Conductors, EleetrU Telegraphy, and other applications of Electricity. 



MACMILLAN & CO., 22 Bond Street, NEW YORK. 



2STOA7V IFLE^ID-ST. 



BRITISH BARROWS: 



A RECORD OF THE EXAMINATION OF 



Sepulchral Mounds 



IN VARIOUS PARTS OF ENGLAND. 



IB^T WILLIAM O-I^EjEisT^W^EXjIL.. 



TOGETHER WITH DESCRIPTION OF FIGURES OF SKULLS. GENERAL REMARKS ON PREHISTORIC 



CR\NIA. AND AN APPENDIX, 



By GEORGE ROLLESTON, M.D., F.R.S., 



Lin acre Professor of Anatomy and Physiology and Fellow of Merton College, Oxford. 



With Illustrations. Svo. $9- 



" The prehistoric inhabitants of Europe are now exciting an interest in the minds of thoughtful men which, twenty years ago, would 

 have seemed impossible, and which can no longer be ignored by the historian. The story of Man in Great Britain is rapidly being 

 unfolded, principally by the careful and scientihe exploration of the various remains which are eloquent of the condition of things that 

 passed away before the art of letters was known in the North ; and among those who have been instrumental in bringing this about, 

 Mr. Greenwell w ill ever deserve a foremost place. ... In conclusion, it remains merely to say that this valuable work fills a void in 

 the archaeological record of Great Britain, and that it contains a larger mass of accurately-observed lacts than any book hitherto pub- 

 lished relating to the Bronze age in this country." — W. Boyd Dawkins. 



MACMILLAN & CO.. 22 Bond Street. NEW YORK. 



