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Credit
Specification of Joseph Jewell : preparation of calomel for medicinal use. Public Domain Mark. Source: Wellcome Collection.
Patent for "a method of preparing or reducing to an impalpable powder for medicinal use the substance commonly called or known by the name of calomel, whereby the process usually employed of levigating the same is rendered unnecessary.
| Location | Status | Access | |
|---|---|---|---|
Closed stores Pat. vol. 16 |
| Location | Access | ||
|---|---|---|---|
Closed stores Pat. vol. 16:30 |