Poynting, J.H.. <br/><br/>
The Mean Density of the Earth: An Essay /  Textual Documents 
J.H.Poynting. 
 - 1st ed. / 
 - London :  Charles Griffin & Co. Ltd. ,  1894. 
 - 156p. ;  22cm. 
<br/><br/><label>Subjects--Index Terms: </label>Physics Mean Density-Earth G-Physics 
<br/><br/><label>Dewey Class. No.: </label>531.51  / P 877 M