If it be too strong, it will leave a whiteness upon the feather.

A preparation of arsenic is frequently used ; but it is very dangerous, and sometimes attended with lamentable consequences.

I knew a natu- ralist, by name Howe, in Cayenne, in French Guiana, who had lost sixteen of his teeth.

He kept them in a box, and showed them to me.

On open- ing the lid " These fine teeth," said he, " once belonged to my jaws : they all dropped out by my making use of the arsenetique for pre- serving the skins of animals.