Dr. MhIUh tryed lately an Experiment upon the fa- 
mous Irijh Herb called, Machnh(^^ or Tithmalm Hibtr- 
fiicus^ which is by the Natives reported to be fo ftrcng a 
Purge , that even the carrying it about one in their 
Cloaths is fufficient to produce the Effedt ; this fabulous 
Story which has long prevailed, he prov'd falfe, by car- 
rying its Roots for Three Days in his Pocket, without 
any Alteration of that fort. 
A Quarry of white Marble is lately difcovered in the 
County of Antrimy a Specinien of which was brought to 
us ; 'tis of an extreamly fine Grain, fofc at firft, but 
grows very hard afterwards , like your Tortland 
Stone. 
