XXVI ADVERTISEMENTS. 



HAVE YOO ETER STOPPED TO TfllSK 



How much time and money is lost by not having the 



best books on the special subjects you 



are interested in ? 



Those desiring to investigate any scientific or technical subject can learn the 

 sources of information on the same by writing to 



THE SCIENTIFIC PUBLISHING COMPANY. 



Their Elaborate Classified Catalogues of Scientific and Technical Books will be 

 found invaluable to those engaged in Mitring, Metallurgy, Geology, General Engi- 

 neering. Mechanics. Chemistry, Electricity, surveying, Railroading, and kindred 

 sciences. Will be forwarded, postage free, on application. 



SPECIAL NOTICE TO AUTHORS 



WHO HAVE GOOD BOOKS TO PUBLISH. 



Scientific discovery and improvements in practice are n^w so rapid 

 that in a few years a large proportion of what are now standard works 

 will become obsolete. As modern methods supersede the older, so modern 

 works on each subject aie constantly required. The advantages which 

 the Scientific Publishing Company possesses for bringing out and making 

 known the books deemed by it worthy of publication are altogether 

 exceptional. The mere fact that these Publishers have brought out a 

 new oook on any subject, being universally accepted as a guarantee that 

 the work has merit, overcomes the disadvantages which new authors 

 labor under in getting their books before the world. The only require- 

 ment the Scientific Publishing Company insists on is that the book shall 

 be THE BEST on its subject, and th standing and reputation of a new 

 author are established by the mere fact that the Scientific Publishing 

 Company publishes his book. 



The high character of the new works already published, thfir spon- 

 taneous recognition, enthusiastic reception and large sales attest i he fact 

 that i he course the Scientific Publishing Companv is pursuing has met 

 with approval among professional men and student?. Other equally 

 important works are now in preparation. 



HP SPECIAL DISCOUNTS GIVEN to Libraries, Educa- 

 tional Institutions, and on Important Cash Orders. &* 



ANY PUBLICATION, EITHER SCIENTIFIC OR GENERAL IN 



CHARACTER CAN BE SUPPLIED. SEND YOUR 



ORDERS FOR BOOKS AND MAGAZINES TO 



THE SCIENTIFIC PUBLISHING COMPANY, 



-A.1ST33 

 27 PARK PLACE, NEW YORK. 



