 drug triangles
Have made my own in the past from two strips wood/plastic on a piece of ply or plastic sheet. all available from model shops.
The counters I really like were similar to those used in industry on a larger scale, consisting of holes in perspex. These could be used easily for s/c or e/c coated tabs which are difficult in a triangle.
We the had King counters which could easily be fooled if you put too many tabs through at once. Many pharmacies have the torsion balances which work fine if you use say 10 tabs as sample.
johnep |