�y��vlog

Here the illustrations are facsimile reproductions by Amand-Durand's heliogravure process, and their delicacy is perfectly seen.

After considerable experimental work, involving several methods and several firms, the making of the heliogravure plates and the hand-press prints was entrusted to The Photogravure and Color Company of New York City.

The collection also includes Millet's lithograph, The Sower, and his rare heliogravure, Maternal Precaution.

The heliogravure reproduction of the Trifid nebula is No. 55.