RARE Book Dept.
=XG 321
no.7
ENGRAVING.
Spencer, Asa, £1.1842.
++. Vindication of claims to certain inventions and improvements in the graphic art. By Asa Spen- cer.
CNew Haven? 18427]
l2p. 21.5cm.
Caption title.
At head of title: "Appendix to the American Journal of Science and Arts, vol.xliv, No.1."
Claiming invention of process of mechanical engraving.
Printed buff f @ front wrapper preserved,
MR