"sal soda" meaning in English

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  "lang_code": "en",
  "pos": "noun",
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          "ref": "1847, editorial staff, “Patent Grease for Railway Axles”, in Scientific American, series 1, Volume 3, Issue 9, page 72:",
          "text": "Water 1 gallon, clean tallow, 3 lbs., palm oil 6 lbs., common sal soda ½ lb., (or tallow 8 lbs., and palm oil 10 lbs.,)—mixture to be heated to 210° and well stirred till it is down to about 70°.",
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      "glosses": [
        "sodium carbonate"
      ],
      "id": "en-sal_soda-en-noun-IRN6ElLQ",
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          "sodium carbonate"
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  "word": "sal soda"
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  "lang_code": "en",
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          "ref": "1847, editorial staff, “Patent Grease for Railway Axles”, in Scientific American, series 1, Volume 3, Issue 9, page 72:",
          "text": "Water 1 gallon, clean tallow, 3 lbs., palm oil 6 lbs., common sal soda ½ lb., (or tallow 8 lbs., and palm oil 10 lbs.,)—mixture to be heated to 210° and well stirred till it is down to about 70°.",
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        "sodium carbonate"
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  "word": "sal soda"
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