(254) 
tained during his summer vacation, spent in the vicinity of 
Easton, Pa. Dr. Tyler was supplied with a complete list of 
the economic material accessible in this general region, with 
detailed instructions for the collection and preservation of each 
species, to the number of nearly three hundred. Dr. Tyler 
worked during the months of July and August and collected 
20 sets of 83 species each. An offer to exchange these speci- 
mens was then embodied in a printed circular, copy of which 
accompanies this report, and designated ‘* Circular No. 2.” 
Exchanges have been arranged as follows: 
The Instituto Medico Nacional, of Mexico, has promised 
us a duplicate set of their exhibits in course of preparation for 
the Paris Exposition. 
The Technological Museum of Sidney has promised us a 
collection of Australian products. 
Negotiations are now under way with the Government of 
British India for a complete set of the economic products of 
that country, and promise to result successfully. 
Many copies of our circular have been mailed to distant 
institutions, which, owing to the late date when the circular 
was printed, have not resulted in the arrangement of ex- 
changes up to the close of the year. 
In the matter of securing donations, a special course was 
followed, in addition to the ordinary one of improving 
such casual opportunies as presented themselves. A list of 
all the leading vegetable-product industries, to the number of 
more than a hundred, was prepared, and a schedule made 
out of all the articles required to suitably illustrate each of 
them. Copies of these schedules were sent to representative 
persons or companies engaged in the respective industries. 
A special printed circular, designated ‘« Circular No. 1,” an 
copy of which accompanies this report, was prepared, setting 
forth the principles and methods of our proposed industrial 
exhibit, and inviting those able and willing to donate the re- 
quired sets of materials, models, photographs and other arti- 
cles listed in the respective schedules. The advantages 
likely to accrue to those making these donations were suitably 
