In 1820 another secession of workmen from the New England Glass Company took place, to embark on their own account their savings of many years in the doubtful enterprise of establishing flint-glass works in Kensington, Philadelphia, under the title of the Union Flint-Glass Company. The proprietors, being all workmen, were enthusiastic in the project, happy in the belief that they could carry it on successfully, work when convenient, and enjoy much leisure. All was _then_ to them sunshine. Ere long they realized the many inherent evils attendant on flint-glass works; the demon of discord appeared among them, and they discovered, when too late, that they had left a place of comfort and ease for a doubtful enterprise. Death thinned their ranks, and the works, after passing into other hands for a short trial, have years since ceased to exist. From 1820 to 1840 very many attempts were made, by corporations and firms, to establish the manufacture of flint-glass in the Atlantic States, but almost with entire failure. The parent tree, the old South Boston concern, failed; the works were revived from time to time by at least five different concerns, and all ended in failure; and for years the works remained closed, till the present occupant, Mr. Patrick Slane, hired the premises, and by his enterprise and great industry has greatly enlarged the works, and is now carrying on a large and active business. In his factory we learn the old system among the operatives he does not allow to have a foothold, and the individual industry of his hands is not cramped or limited by the oppressive system of the old school operative. As a record of the past and a reference for the future, we find, in reviewing the various attempts to establish flint-glass works in the Atlantic States, that it would not be just to place the names of those identified with them before the reader; for many were deluded by the projectors with promises of the most flattering success, but realized only disappointment and loss. In enumerating all the concerns, companies, and corporations that have been engaged in the manufacture of flint-glass in the Atlantic States, we find the number to be forty-two; of which number two concerns have retired, and ten are now in operation, viz., two at East Cambridge, three at South Boston, one at Sandwich, three near New York City, and one at Philadelphia; leaving two concerns who retired with property, and twenty-eight out of the forty-two concerns entire failures, involving the parties interested in heavy loss, the fate of the existing ten to be determined by future events.