In dealing with the medicines in the Appendix, it will be found that here and there hints are thrown out as to the action of medicines that may be thought out of place in a Pharmacopoeia. It must, however, be remembered that this is done with medicines about which but little is known, and the line of extra information, where given, may explain why the medicine is introduced. Another Object is gained thereby: medical men may be tempted to prove medicines if they see something to encourage them to do so.