Homemade ways to test food products.
Lvov 1911; publ. Circle of Chemists Member of the Industrial Aid League in Lvov. 8 (large), pp. 36, numerous advertisements, wraps broch. oryg.
Soiling and rubbing of covers, no. Trace of flooding on lower corner of copy, in places on pages non-staining and soiled. Ways to study, among others: milk, cream, chocolate, vinegar.
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