A diagram illustrating how to measure medicine accurately from 1926, using a graduated cylinder with fluid drams as the measuring unit (also called fluidrams, fluid drachms, or fluidrachms). Originally contained the caption "HOW TO MEASURE."

No author information for illustration in source, or in original publication:
The Art of Dispensing: a Treatise on the Methods and Processes Involved in Dispensing Medical Prescriptions] (10th ed.). London: Chemist and Druggist. 1926. p. 28. OCLC 429791028.

• A photograph, which has never previously been made available to the public (e.g. by publication or display at an exhibition) and which was taken more than 70 years ago (before 1 January 1955); or

• A photograph, which was made available to the public (e.g. by publication or display at an exhibition) more than 70 years ago (before 1 January 1955); or

• An artistic work other than a photograph (e.g. a painting), or a literary work, which was made available to the public (e.g. by publication or display at an exhibition) more than 70 years ago (before 1 January 1955).

This tag can be used only when the author cannot be ascertained by reasonable enquiry. If you wish to rely on it, please specify in the image description the research you have carried out to find who the author was. The above is all subject to any overriding publication right which may exist. In practice, publication right will often override the first of the bullet points listed.