This residue in its turn is then subjected to distillation under reduced pressure to give both a vacuum distillate and a vacuum residue.
Indeed, the 'recycling' offers a more teacher-friendly distillation of the rather subtle ideas expressed in his earlier books, the last two in particular.
What is presented here is a distillation which highlights the differences between the cases.
In the sixteenth and early seventeenth centuries, pharmacy was still largely concerned with its traditional functions of the distillation and extraction of organic materials.
Nonetheless, his definition indicates to us that distillation became the representative method of chemical analysis by mid-seventeenth century.
It is a skillful distillation of an immense amount of work, presented in an accessible format of well-written text, simple diagrams and summary tables.
If the distillation process regulated one set of chemical terminology, it did not provide an exhaustive criterion for classification.
The volume is an extremely readable distillation of views.
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