68 REPORTS ON INVESTIGATIONS AND PROJECTS. 



Regarding the unfinished part of his work, he reports that Prof. B. H. 

 Hibbard is at work on the "Federal land policy" and hopes that this will be 

 his last annual report of progress. 



Prof. F. W. Blackmar has completed his study of "The social and eco- 

 nomic phases of irrigation." He hopes to complete his general study of 

 American agriculture down to 1840 within twelve to eighteen months. 



Dr. E. D. Jones reports progress on his study of the "Development of the 

 agricultural market since 1840." 



Prof. H. C. Taylor has been somewhat delayed in his study of the "De- 

 velopment of the leading forms of land tenure" because both he and Dr. 

 John L. Coulter have been called upon to give a great deal of time to the 

 United States Census of Agriculture. Mr. L. C. Gray is devoting his time 

 to the work of the Institution. 



Division III.— MINING. 

 Mr. E. W. Parker reports that the following has been completed and pub- 

 lished within the year: 



History of the mining of gold and silver. By Walter R. Crane. John Wiley & 

 Sons, New York, 1909. 



The following studies have been received but not published : 



A chapter on platinum. By Dr. David T. Day. 



Chapters on aluminum, lithographic stone, fluorspar, and graphite. By Prof. 

 Ira A. Williams. 



The status of the unfinished work is as follows: 



Prof. C. K. Leith has been delayed in his study of iron ore on account of 

 his work in the Hudson Bay region and later by a month in Cuba. He hopes, 

 however, that his report will soon be substantially ready for transmittal. 



Mr. L. C. Graton has completed about 200 pages of the monograph on the 

 history of the copper industry. He has been delayed because of the pressure 

 of other work, but expects soon to be able to devote all of his time to the 

 historical chapters. 



Dr. F. B. Laney has been delayed by serious illness, extending from Octo- 

 ber 1909 to May 1910. He thinks, however, that he will be able to finish 

 his study of the quarrying industry by spring. 



No report has been received from Prof. Joseph Hyde Pratt on precious 

 stones, abrasive materials, etc. ; and Prof. Charles E. Munroe has been inter- 

 rupted by the conditions prevailing in George Washington University. 



Dr. David T. Day, whose chapter on platinum is mentioned above, expects 

 to complete soon the chapters on quicksilver, antimony, etc. * 



Mr. William E. Colby has recently been appointed lecturer on mining law 

 at the University of California, and this is of material assistance to him in 

 the preparation of his chapter. 



Mr. Parker, in addition to the editorial condensation of the chapters al- 

 ready received, has been devoting himself to the preparation of the general 

 chronology of mining. 



*This chapter was completed in November 1910. 



