Examples from the Web for arsenical
The Arsenical vapours being conducted into this passage, adhere both to the sides thereof and to the joists that lye across it.
Arsenical compounds have supplanted practically all other substances used to combat external biting insects.Apple Growing|M. C. Burritt
Iron and Arsenical Pyrites are also very common attendants, and are both confounded under the name of Mundic.A Guide to the Mount's Bay and the Land's End|John Ayrton Paris
A fresh section of it shows it to be Arsenical Iron Pyrites, each piece weighing four or five ounces.The Mound Builders|George Bryce
This is owing to some particles of inflammable matter, from which Arsenical minerals are seldom quite free.