1880 U.S. Census: occupation variable "occhisco" lacks some value labels

I’m exploring U.S. 1880 Census data (100%), which is wonderful. One variable for occupation is “occhisco”, the Historical Classification of Occupations. Almost all the values are labelled in the data file, but some labels are missing.

In some cases these labels must be be idiosyncratic, as the codes don’t apear in the HISCO database (http://historyofwork.iisg.nl/major.php).

The original 1% sample user guide (Ruggles & Menard 1994) doesn’t include any information on HISCO occupational coding.

Any help would be much appreciated!

Thanks,

Michael

Codes without value labels:

6112

7110

7210

33210

38030

39790

45132

45134

56000

59990

61320

62790

77990

87110

89690