(333) 
During the season lectures have been delivered at the ma- 
rine biological laboratories at Cold Spring Harbor and at 
Wood’s Hole, in addition to attendance upon several scientific 
meetings. A piece of investigation upon Symbiosis and Sap- 
rophytism has been completed and published in the bulletin 
of the Torrey Botanical Club for October, 1899, which has 
been reprinted as No. 1 of the Contributions from the New 
York Botanical Garden. Various other technical and popu- 
lar articles have been written for other periodicals. An in- 
troductory text-book on botany, entitled «* Nature and Work 
of Plants,” has been prepared and is now in press with the 
Macmillan Company. 
Respectfully submitted, 
D. T. MacDoueat, 
Director of the Laboratories. 
