A precision apparatus for applying liquid in uniform droplets to test surfaces has been described. The mean diameter of the droplets can be varied from 0.045 to 0.450 mm.
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Three positions of this switch are indicated in small letters on the diagram: The gear ratios are also indicated directly above the switch; these are 5, 25, and 125 to 1.
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The tip of the stylus as the anode and a copper wire as the cathode are dipped into a solution of sodium chloride. A potential of 6v is applied to the system and, by skillful handling of the tip of the stylus at the surface of the solution, metal is removed to form a smooth tapered point.
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Both anticholinesterase and DEP (diethylphthalate) were used for the delivery studies. The agents were dyed with Williams Red (Color index 288) and carefully filtered before use.
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© 1960 The American Institute of Physics.
1960
The American Institute of Physics
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