In 1834, Federico Lacelli patented a zincographic printing process, producing large maps called g�oramas.
2.
He actively encouraged subscribers and accused gentlemen who did not subscribe to the photo-zincographic " Domesday " of being unpatriotic and benighted.
3.
In 1868 he transferred the preparation of the " Atlas of India " from England to Calcutta, selecting a staff of engravers there for the purpose, and encouraging John Bobanau Nicklerlieu Hennessey to introduce the photo-zincographic process.
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