Under separate covers, Elmer is sending Prain 18 Philippine herbarium specimens that have given him considerable trouble. If it is not asking too much, he would be obliged if Prain could have them determined. In connection with his collecting and distributing Philippine herbarium specimens, Elmer publishes LEAFLETS OF PHILIPPINE BOTANY, which chiefly contains the results from his own material. Specialists of different families have kindly consented to determine his Philippine material and have their results published in the 'Leaflets'. He asks if Prain could accept these specimens under the same conditions, or if he would rather verify them and give Elmer the nearest possible name. Either way is satisfactory and would be very much appreciated. Annotated. Pages 1 and 4 of 4.