An experimental inquiry into the properties of opium : and its effects on living subjects: with observations on its history, preparations and uses. Being the disputation which gained the Harveian prize for the year 1785 / By John Leigh.

  • Leigh, John, active 1786.
Date:
1786
Catalogue details

Licence: Public Domain Mark

Credit: An experimental inquiry into the properties of opium : and its effects on living subjects: with observations on its history, preparations and uses. Being the disputation which gained the Harveian prize for the year 1785 / By John Leigh. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

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    clafs feems to merit the greated attention; for though, when repeated, they did not perfetflly correfpond with the fird, yet I found in them the lead variation. Upon examining the different quantities found in the feveral claffes of experiments, it is clear a lofs has been fudained in fome of them ; but it mud be obferved, that tho’ it is impoffible to avoid fome lofs in expe- riments of this nature, dill we fhall find it lefs on the prefent occafion than appears at fil'd view. The opium which I ufed in thefe experiments had never received any heat, which I found by trial would free it, even applied in a moderate degree, of a very confiderable part of its moidure, and confequently leffen its weight. One ounce of the common opium of the fhops will, by expofure to a moderate heat, be de- prived of one drachm of its weight. * i The reafons which led me to ufe the pro-