Smithsonian Report. I''il. Walkins 



Plate 7 



Four solar lamps. Usualh- designed lo burn lard uW, these used a modified Argaiid burner 

 with a device to shade the flame into a column of light. The shades were often globular, 

 with engraved designs. The solar lamp was economical and efficient and was especially 

 popular in the 1840's. 



^0!2B*^ 



Three patent models of tin lard-burning lamps: Left, Harvey Tcmlinson's patent, Geneva 

 N. Y., September 1, 1843, embodying an Argand burner with copper air tube. Middle 

 Zebulon Warroll's patent, Chester Hill, Ohio, February 7, 1842, dq:>ending upon gravity 

 for flow of fuel, the heat from the flame warming the lard in the reservoir. Right, One 

 of several patents by Robert Cornelius, of Philadelphia, this one dated April 6, 1843. A 

 ribbon wick with copper conductor strip is the working principle. 



