Humphrey, S. D.  1823-1883. <br/><br/>
A practical manual of the collodion process,  giving in detail a method for producing positive and negative pictures on glass and paper.  Ambrotypes.  Printing process ... 
By S. D. Humphrey. 
 - 3d ed., rev. and greatly enl. 
 - New York,  Humphrey's journal print,  1857. 
 - 2 p. l., [xi]-xii, [13]-215 p.  illus.  19 cm. 
<br/><br/> Publisher's advertisement: 4 p. (at front) 
<br/><br/><label>LCCN: </label>ca 09005901  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Photography.<br/>Ambrotype.
<br/><br/><label>LC Class. No.: </label>TR390  / .H92