It was the first to collect the fugitive essays of Macaulay, Jeffrey, Mackintosh, Carlyle, and others and publish them in separate volumes.
Carey died in 1845, and Hart continued the publishing business until 1854, when he retired.
[1] After retiring from the publishing business, he involved himself with industrial enterprises, serving in an executive capacity at the Centennial Button-hole Machine Company and the American Button-hole Machine Company.
[2] He was president of the board of trustees of Maimonides College, the first (albeit short-lived) rabbinical seminary in the United States.
[2] He died in 1885 and is interred in the Mikveh Israel Cemetery (11th and Federal) in South Philadelphia.