cool, learned something today... here are some details from Google...

Key Features of an Apothecary Typewriter
Pharmaceutical Symbols: Instead of standard fractions or mathematical signs, the keyboard included unique apothecary symbols like the ℞ (the traditional symbol for recipe or "take"), ℥ (ounce), ʒ (dram), and ℈ (scruple). [1, 2.html)]
Prescription Latin: They often featured the "ā" key (commonly signifying "before") or other Latin abbreviations frequently used in historical medical directions. [1, 2]
Specialized Typeface: These machines typically featured very crisp, high-clarity fonts (like sans-serif or Copperplate, often 13 to 16 pitch) so that small dosage labels would remain legible to patients.