20. Catnip 32 21. Hoarhound 33 22. Hoarhound, flowering top 34 23. Blessed thistle 35 24. Yarrow 36 25. Canada fleabane 37 26. Jimson weed 38 27. Leaves, flower, and capsules of jimson weed 39 28. Poison hemlock 40 29. American wormseed 41 30. Black mustard 43 31. White mustard 44 B. P. I.—89. B. I. E.—55. WEEDS USED IN MEDICINE. INTRODUCTION. It is a matter of interest, primarily to the farmer, that certain of the well-known weeds now either generally or locally infesting the country are the sources of crude drugs at the present time obtained wholly or in part by importation from abroad. Roots, leaves, and flowers of several of the species most detrimental in the United States are gathered, prepared, and cured in Europe, and not only form useful commodities there but supply to a considerable extent the demands of foreign lands. Hence it appears probable that while weeds can hardly be made desirable, still in his fight to exterminate them the farmer may be able to turn some of them to account. Some of the plants coming within this class are in many States at present subject to antiweed laws and farmers are required to take measures toward their extermination. It seems, therefore, desirable to make these pests sources of profit where possible. In many cases, when weeds have been dug, the work of handling and curing them is not excessive and can readily be done by women and children. The prices paid for crude drugs from these sources are not great and would rarely tempt anyone to pursue this line of work as a business. Yet, if in ridding the farm of weeds and thus raising the value of the land the farmer can at the same time make these pests the source of a small income instead of a dead loss, something is gained. In order to help the farmer to obtain the best possible prices for such products, instructions for collecting and preparing crude drugs derived from weeds are here briefly given. The collector should observe them carefully. COLLECTION AND CURING OF DRUGS.