... after Hahnemann´s original instructions
Potassium hydrogen sulfate was molten on an iron plate and ground up. Two ounces of the powder were then dissolved in boiling water.
Some especially pure burnt lime was obtained from the Swabian Alps, where it was produced on a wood furnace. This was briefly dipped into water and left in a bowl to burn. After only a few minutes of intense chemical reaction the lime was completely burnt and collapsed into a powder. Again, two ounces were taken from this powder.
Both powders were then mixed in a warmed up mortar and this mass was then filled into a glass plunger (handmade replica) as described by Hahnemann. A pig´s bladder was arranged around the neck of the plunger and a fitting distilling top (handmade replica) was attached.
A moderate oak charcoal fire was heated in the garden in an original brick furnace from 1850. On top of the furnace a cold sand bath was placed in which the distillation equipment was placed. This was modeled after a modern round bottom flask in cold water bath. Soon the clear distillate started to drop into the receiver and after one hour and careful strengthening of the heat the distillation was completed. About 1.5 ounces of water clear fluid of flavourless odour and little, slightly soapy taste were produced, known as „Causticum Hahnemanni“.
Course of manufacture: 1. making of oak charcoal, 2. heating of oven, 3. dissolving of potassium hydrogen sulfate, 4. dissolved potassium hydrogen sulfate, 5. burning of lime, 6. burnt lime , 7. weighing of burnt lime, 8. mixing of warm potassium hydrogen sulfate solution with burnt lime, 9. pig´s bladder (biological), 10. attaching top with wet bladder, 11. heating of sand bath, 12. beginning of destillation, 13. distilling causticum, 14. fresh causticum distillate.
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